Andrew Wilcox <awilcox@maine.com>
Andrey Sapozhnikov <sapa@icb.chel.su>
Andy Armstrong <andy@hexten.net>
+Andy Broad <andy@broad.ology.org.uk>
Andy Bussey <andybussey@yahoo.co.uk>
Andy Dougherty <doughera@lafayette.edu>
Andy Lester <andy@petdance.com>
Charles Wilson <cwilson@ece.gatech.edu>
Charlie Gonzalez <itcharlie@gmail.com>
Chas. Owens <chas.owens@gmail.com>
+Chase Whitener <cwhitener@gmail.com>
Chaskiel M Grundman
Chia-liang Kao <clkao@clkao.org>
Chip Salzenberg <chip@pobox.com>
James Raspass <jraspass@gmail.com>
Jamshid Afshar
Jan D. <jan.djarv@mbox200.swipnet.se>
-Jan Dubois <jand@activestate.com>
+Jan Dubois <jan@jandubois.com>
Jan Pazdziora <adelton@fi.muni.cz>
Jan Starzynski <jan@planet.de>
Jan-Erik Karlsson <trg@privat.utfors.se>
Vadim Konovalov <vkonovalov@lucent.com>
Valeriy E. Ushakov <uwe@ptc.spbu.ru>
Vernon Lyon <vlyon@cpan.org>
+Victor Adam <victor@drawall.cc>
Victor Efimov <victor@vsespb.ru>
Viktor Turskyi <koorchik@gmail.com>
Ville Skyttä <scop@cs132170.pp.htv.fi>
api_version='22'
api_versionstring='5.22.0'
ar='ar'
-archlib='/usr/lib/perl5/5.22.0/armv4l-linux'
-archlibexp='/usr/lib/perl5/5.22.0/armv4l-linux'
+archlib='/usr/lib/perl5/5.22.1/armv4l-linux'
+archlibexp='/usr/lib/perl5/5.22.1/armv4l-linux'
archname64=''
archname='armv4l-linux'
archobjs=''
cat='cat'
cc='cc'
cccdlflags='-fpic'
-ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.22.0/armv4l-linux/CORE'
+ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.22.1/armv4l-linux/CORE'
ccflags='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
ccflags_uselargefiles='-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
ccname='arm-linux-gcc'
inc_version_list_init='0'
incpath=''
inews=''
-installarchlib='./install_me_here/usr/lib/perl5/5.22.0/armv4l-linux'
+installarchlib='./install_me_here/usr/lib/perl5/5.22.1/armv4l-linux'
installbin='./install_me_here/usr/bin'
installhtml1dir=''
installhtml3dir=''
installman3dir='./install_me_here/usr/share/man/man3'
installprefix='./install_me_here/usr'
installprefixexp='./install_me_here/usr'
-installprivlib='./install_me_here/usr/lib/perl5/5.22.0'
+installprivlib='./install_me_here/usr/lib/perl5/5.22.1'
installscript='./install_me_here/usr/bin'
-installsitearch='./install_me_here/usr/lib/perl5/site_perl/5.22.0/armv4l-linux'
+installsitearch='./install_me_here/usr/lib/perl5/site_perl/5.22.1/armv4l-linux'
installsitebin='./install_me_here/usr/bin'
installsitehtml1dir=''
installsitehtml3dir=''
-installsitelib='./install_me_here/usr/lib/perl5/site_perl/5.22.0'
+installsitelib='./install_me_here/usr/lib/perl5/site_perl/5.22.1'
installsiteman1dir='./install_me_here/usr/share/man/man1'
installsiteman3dir='./install_me_here/usr/share/man/man3'
installsitescript='./install_me_here/usr/bin'
pr=''
prefix='/usr'
prefixexp='/usr'
-privlib='/usr/lib/perl5/5.22.0'
-privlibexp='/usr/lib/perl5/5.22.0'
+privlib='/usr/lib/perl5/5.22.1'
+privlibexp='/usr/lib/perl5/5.22.1'
procselfexe='"/proc/self/exe"'
prototype='define'
ptrsize='4'
sig_num_init='0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 6, 17, 29, 31, 0'
sig_size='68'
signal_t='void'
-sitearch='/usr/lib/perl5/site_perl/5.22.0/armv4l-linux'
-sitearchexp='/usr/lib/perl5/site_perl/5.22.0/armv4l-linux'
+sitearch='/usr/lib/perl5/site_perl/5.22.1/armv4l-linux'
+sitearchexp='/usr/lib/perl5/site_perl/5.22.1/armv4l-linux'
sitebin='/usr/bin'
sitebinexp='/usr/bin'
sitehtml1dir=''
sitehtml1direxp=''
sitehtml3dir=''
sitehtml3direxp=''
-sitelib='/usr/lib/perl5/site_perl/5.22.0'
+sitelib='/usr/lib/perl5/site_perl/5.22.1'
sitelib_stem='/usr/lib/perl5/site_perl'
-sitelibexp='/usr/lib/perl5/site_perl/5.22.0'
+sitelibexp='/usr/lib/perl5/site_perl/5.22.1'
siteman1dir='/usr/share/man/man1'
siteman1direxp='/usr/share/man/man1'
siteman3dir='/usr/share/man/man3'
strerror_r_proto='0'
strings='/usr/include/string.h'
submit=''
-subversion='0'
+subversion='1'
sysman='/usr/share/man/man1'
tail=''
tar=''
vendorprefixexp=''
vendorscript=''
vendorscriptexp=''
-version='5.22.0'
-version_patchlevel_string='version 22 subversion 0'
+version='5.22.1'
+version_patchlevel_string='version 22 subversion 1'
versiononly='undef'
vi=''
xlibpth='/usr/lib/386 /lib/386'
config_argc=0
PERL_REVISION=5
PERL_VERSION=22
-PERL_SUBVERSION=0
+PERL_SUBVERSION=1
PERL_API_REVISION=5
PERL_API_VERSION=22
PERL_API_SUBVERSION=0
api_version='22'
api_versionstring='5.22.0'
ar='ar'
-archlib='/usr/lib/perl5/5.22.0/armv4l-linux'
-archlibexp='/usr/lib/perl5/5.22.0/armv4l-linux'
+archlib='/usr/lib/perl5/5.22.1/armv4l-linux'
+archlibexp='/usr/lib/perl5/5.22.1/armv4l-linux'
archname64=''
archname='armv4l-linux'
archobjs=''
cat='cat'
cc='arm-none-linux-gnueabi-gcc'
cccdlflags='-fpic'
-ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.22.0/armv4l-linux/CORE'
+ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.22.1/armv4l-linux/CORE'
ccflags='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
ccflags_uselargefiles='-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
ccname='arm-linux-gcc'
inc_version_list_init='0'
incpath=''
inews=''
-installarchlib='./install_me_here/usr/lib/perl5/5.22.0/armv4l-linux'
+installarchlib='./install_me_here/usr/lib/perl5/5.22.1/armv4l-linux'
installbin='./install_me_here/usr/bin'
installhtml1dir=''
installhtml3dir=''
installman3dir='./install_me_here/usr/share/man/man3'
installprefix='./install_me_here/usr'
installprefixexp='./install_me_here/usr'
-installprivlib='./install_me_here/usr/lib/perl5/5.22.0'
+installprivlib='./install_me_here/usr/lib/perl5/5.22.1'
installscript='./install_me_here/usr/bin'
-installsitearch='./install_me_here/usr/lib/perl5/site_perl/5.22.0/armv4l-linux'
+installsitearch='./install_me_here/usr/lib/perl5/site_perl/5.22.1/armv4l-linux'
installsitebin='./install_me_here/usr/bin'
installsitehtml1dir=''
installsitehtml3dir=''
-installsitelib='./install_me_here/usr/lib/perl5/site_perl/5.22.0'
+installsitelib='./install_me_here/usr/lib/perl5/site_perl/5.22.1'
installsiteman1dir='./install_me_here/usr/share/man/man1'
installsiteman3dir='./install_me_here/usr/share/man/man3'
installsitescript='./install_me_here/usr/bin'
pr=''
prefix='/usr'
prefixexp='/usr'
-privlib='/usr/lib/perl5/5.22.0'
-privlibexp='/usr/lib/perl5/5.22.0'
+privlib='/usr/lib/perl5/5.22.1'
+privlibexp='/usr/lib/perl5/5.22.1'
procselfexe='"/proc/self/exe"'
prototype='define'
ptrsize='4'
sig_num_init='0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 6, 17, 29, 31, 0'
sig_size='68'
signal_t='void'
-sitearch='/usr/lib/perl5/site_perl/5.22.0/armv4l-linux'
-sitearchexp='/usr/lib/perl5/site_perl/5.22.0/armv4l-linux'
+sitearch='/usr/lib/perl5/site_perl/5.22.1/armv4l-linux'
+sitearchexp='/usr/lib/perl5/site_perl/5.22.1/armv4l-linux'
sitebin='/usr/bin'
sitebinexp='/usr/bin'
sitehtml1dir=''
sitehtml1direxp=''
sitehtml3dir=''
sitehtml3direxp=''
-sitelib='/usr/lib/perl5/site_perl/5.22.0'
+sitelib='/usr/lib/perl5/site_perl/5.22.1'
sitelib_stem='/usr/lib/perl5/site_perl'
-sitelibexp='/usr/lib/perl5/site_perl/5.22.0'
+sitelibexp='/usr/lib/perl5/site_perl/5.22.1'
siteman1dir='/usr/share/man/man1'
siteman1direxp='/usr/share/man/man1'
siteman3dir='/usr/share/man/man3'
strerror_r_proto='0'
strings='/usr/include/string.h'
submit=''
-subversion='0'
+subversion='1'
sysman='/usr/share/man/man1'
tail=''
tar=''
vendorprefixexp=''
vendorscript=''
vendorscriptexp=''
-version='5.22.0'
-version_patchlevel_string='version 22 subversion 0'
+version='5.22.1'
+version_patchlevel_string='version 22 subversion 1'
versiononly='undef'
vi=''
xlibpth='/usr/lib/386 /lib/386'
config_argc=0
PERL_REVISION=5
PERL_VERSION=22
-PERL_SUBVERSION=0
+PERL_SUBVERSION=1
PERL_API_REVISION=5
PERL_API_VERSION=22
PERL_API_SUBVERSION=0
the most important issues are listed below, but you should refer
to pod/perldelta.pod for more detailed information.
-B<WARNING:> This version is not binary compatible with earlier versions
-of Perl. If you have built extensions (i.e. modules that include C code)
+B<WARNING:> This version is not binary compatible with versions of Perl
+earlier than 5.22.0.
+If you have built extensions (i.e. modules that include C code)
using an earlier version of Perl, you will need to rebuild and reinstall
those extensions.
Note that the exact format and range of long doubles varies:
the most common is the x86 80-bit (64 bits of mantissa) format,
but there are others, with different mantissa and exponent ranges.
-In fact, the type may not be called "long double" at C level, and
-therefore the C<uselongdouble> means "using floating point larger
-than double".
=head3 "more bits"
=head3 quadmath
-One option for long doubles is that gcc 4.6 and later have a library
+One option for more precision is that gcc 4.6 and later have a library
called quadmath, which implements the IEEE 754 quadruple precision
(128-bit, 113 bits of mantissa) floating point numbers. The library
works at least on x86 and ia64 platforms. It may be part of your gcc
With "Configure -Dusequadmath" you can try enabling its use, but note
the compiler dependency, you may need to also add "-Dcc=...".
At C level the type is called C<__float128> (note, not "long double"),
-but Perl source knows it as NV.
+but Perl source knows it as NV. (This is not "long doubles".)
=head3 Algorithmic Complexity Attacks on Hashes
=item Directories for the perl distribution
-By default, Configure will use the following directories for 5.22.0.
+By default, Configure will use the following directories for 5.22.1.
$version is the full perl version number, including subversion, e.g.
5.12.3, and $archname is a string like sun4-sunos,
determined by Configure. The full definitions of all Configure
=head1 Coexistence with earlier versions of perl 5
-Perl 5.22.0 is not binary compatible with earlier versions of Perl.
+Perl 5.22.1 is not binary compatible with versions of Perl earlier than
+5.22.0.
In other words, you will have to recompile your XS modules.
In general, you can usually safely upgrade from one version of Perl
libraries after 5.6.0, but not for executables. TODO?) One convenient
way to do this is by using a separate prefix for each version, such as
- sh Configure -Dprefix=/opt/perl5.22.0
+ sh Configure -Dprefix=/opt/perl5.22.1
-and adding /opt/perl5.22.0/bin to the shell PATH variable. Such users
+and adding /opt/perl5.22.1/bin to the shell PATH variable. Such users
may also wish to add a symbolic link /usr/local/bin/perl so that
scripts can still start with #!/usr/local/bin/perl.
=head2 Upgrading from 5.21.11 or earlier
-B<Perl 5.22.0 may not be binary compatible with Perl 5.21.11 or
+B<Perl 5.22.1 may not be binary compatible with Perl 5.21.11 or
earlier Perl releases.> Perl modules having binary parts
(meaning that a C compiler is used) will have to be recompiled to be
-used with 5.22.0. If you find you do need to rebuild an extension with
-5.22.0, you may safely do so without disturbing the older
+used with 5.22.1. If you find you do need to rebuild an extension with
+5.22.1, you may safely do so without disturbing the older
installations. (See L<"Coexistence with earlier versions of perl 5">
above.)
print("$f\n");
}
-in Linux with perl-5.22.0 is as follows (under $Config{prefix}):
+in Linux with perl-5.22.1 is as follows (under $Config{prefix}):
./bin/perl
- ./lib/perl5/5.22.0/strict.pm
- ./lib/perl5/5.22.0/warnings.pm
- ./lib/perl5/5.22.0/i686-linux/File/Glob.pm
- ./lib/perl5/5.22.0/feature.pm
- ./lib/perl5/5.22.0/XSLoader.pm
- ./lib/perl5/5.22.0/i686-linux/auto/File/Glob/Glob.so
+ ./lib/perl5/5.22.1/strict.pm
+ ./lib/perl5/5.22.1/warnings.pm
+ ./lib/perl5/5.22.1/i686-linux/File/Glob.pm
+ ./lib/perl5/5.22.1/feature.pm
+ ./lib/perl5/5.22.1/XSLoader.pm
+ ./lib/perl5/5.22.1/i686-linux/auto/File/Glob/Glob.so
Secondly, for perl-5.10.1, the Debian perl-base package contains 591
files, (of which 510 are for lib/unicore) totaling about 3.5MB in its
pod/perl5200delta.pod Perl changes in version 5.20.0
pod/perl5201delta.pod Perl changes in version 5.20.1
pod/perl5202delta.pod Perl changes in version 5.20.2
-pod/perl5210delta.pod Perl changes in version 5.21.0
-pod/perl52110delta.pod Perl changes in version 5.21.10
-pod/perl52111delta.pod Perl changes in version 5.21.11
-pod/perl5211delta.pod Perl changes in version 5.21.1
-pod/perl5212delta.pod Perl changes in version 5.21.2
-pod/perl5213delta.pod Perl changes in version 5.21.3
-pod/perl5214delta.pod Perl changes in version 5.21.4
-pod/perl5215delta.pod Perl changes in version 5.21.5
-pod/perl5216delta.pod Perl changes in version 5.21.6
-pod/perl5217delta.pod Perl changes in version 5.21.7
-pod/perl5218delta.pod Perl changes in version 5.21.8
-pod/perl5219delta.pod Perl changes in version 5.21.9
+pod/perl5203delta.pod Perl changes in version 5.20.3
+pod/perl5220delta.pod Perl changes in version 5.22.0
pod/perl561delta.pod Perl changes in version 5.6.1
pod/perl56delta.pod Perl changes in version 5.6
pod/perl581delta.pod Perl changes in version 5.8.1
"url" : "http://perl5.git.perl.org/"
}
},
- "version" : "5.022000"
+ "version" : "5.022001"
}
homepage: http://www.perl.org/
license: http://dev.perl.org/licenses/
repository: http://perl5.git.perl.org/
-version: '5.022000'
+version: '5.022001'
ndt_obj = $(obj0) $(obj1) $(obj2) $(obj3) $(ARCHOBJS)
obj = $(ndt_obj) $(DTRACE_O)
-perltoc_pod_prereqs = extra.pods pod/perl5220delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
+perltoc_pod_prereqs = extra.pods pod/perl5221delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
generated_pods = pod/perltoc.pod $(perltoc_pod_prereqs)
generated_headers = uudmap.h bitcount.h mg_data.h
pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST
$(MINIPERL) pod/perlmodlib.PL -q
-pod/perl5220delta.pod: pod/perldelta.pod
- $(RMS) pod/perl5220delta.pod
- $(LNS) perldelta.pod pod/perl5220delta.pod
+pod/perl5221delta.pod: pod/perldelta.pod
+ $(RMS) pod/perl5221delta.pod
+ $(LNS) perldelta.pod pod/perl5221delta.pod
extra.pods: $(MINIPERL_EXE)
-@test ! -f extra.pods || rm -f `cat extra.pods`
$spitshell >>$Makefile <<'!NO!SUBS!'
-# Can't depend on lib/Config.pm because that might be where miniperl
+# minitest can't depend on lib/Config.pm because that might be where miniperl
# is crashing.
-minitest: $(MINIPERL_EXE)
+minitest_prep:
-@test -f lib/Config.pm || $(MAKE) lib/Config.pm $(unidatafiles)
@echo " "
@echo "You may see some irrelevant test failures if you have been unable"
@echo "to build lib/Config.pm, or the Unicode data files."
@echo " "
- - cd t && (rm -f $(PERL_EXE); $(LNS) ../$(MINIPERL_EXE) $(PERL_EXE)) \
- && $(RUN_PERL) TEST base/*.t comp/*.t cmd/*.t run/*.t \
- io/*.t re/*.t opbasic/*.t op/*.t uni/*.t perf/*.t \
- </dev/tty
+ - cd t && (rm -f $(PERL_EXE); $(LNS) ../$(MINIPERL_EXE) $(PERL_EXE))
+
+MINITEST_TESTS = base/*.t comp/*.t cmd/*.t run/*.t io/*.t re/*.t opbasic/*.t op/*.t uni/*.t perf/*.t
+
+minitest: $(MINIPERL_EXE) minitest_prep
+ - cd t && $(RUN_PERL) TEST $(MINITEST_TESTS) </dev/tty
+
+minitest-notty minitest_notty: $(MINIPERL_EXE) minitest_prep
+ - cd t && PERL_SKIP_TTY_TEST=1 $(RUN_PERL) TEST $(MINITEST_TESTS)
# Test via harness
# Here comes the CW tools - TO BE FILLED TO BUILD WITH CW -
-MODULE_DESC = "Perl 5.22.0 for NetWare"
+MODULE_DESC = "Perl 5.22.1 for NetWare"
CCTYPE = CodeWarrior
C_COMPILER = mwccnlm -c
CPP_COMPILER = mwccnlm
# versioned installation can be obtained by setting INST_TOP above to a
# path that includes an arbitrary version string.
#
-INST_VER = \5.22.0
+INST_VER = \5.22.1
#
# Comment this out if you DON'T want your perl installation to have
* This symbol contains the ~name expanded version of ARCHLIB, to be used
* in programs that are not prepared to deal with ~ expansion at run-time.
*/
-#define ARCHLIB "c:\\perl\\5.22.0\\lib\\NetWare-x86-multi-thread" /**/
+#define ARCHLIB "c:\\perl\\5.22.1\\lib\\NetWare-x86-multi-thread" /**/
/*#define ARCHLIB_EXP "" /**/
/* ARCHNAME:
* This symbol is the filename expanded version of the BIN symbol, for
* programs that do not want to deal with that at run-time.
*/
-#define BIN "c:\\perl\\5.22.0\\bin\\NetWare-x86-multi-thread" /**/
-#define BIN_EXP "c:\\perl\\5.22.0\\bin\\NetWare-x86-multi-thread" /**/
+#define BIN "c:\\perl\\5.22.1\\bin\\NetWare-x86-multi-thread" /**/
+#define BIN_EXP "c:\\perl\\5.22.1\\bin\\NetWare-x86-multi-thread" /**/
/* BYTEORDER:
* This symbol holds the hexadecimal constant defined in byteorder,
* This symbol contains the ~name expanded version of SITEARCH, to be used
* in programs that are not prepared to deal with ~ expansion at run-time.
*/
-#define SITEARCH "c:\\perl\\site\\5.22.0\\lib\\NetWare-x86-multi-thread" /**/
+#define SITEARCH "c:\\perl\\site\\5.22.1\\lib\\NetWare-x86-multi-thread" /**/
/*#define SITEARCH_EXP "" /**/
/* SITELIB:
* removed. The elements in inc_version_list (inc_version_list.U) can
* be tacked onto this variable to generate a list of directories to search.
*/
-#define SITELIB "c:\\perl\\site\\5.22.0\\lib" /**/
+#define SITELIB "c:\\perl\\site\\5.22.1\\lib" /**/
/*#define SITELIB_EXP "" /**/
#define SITELIB_STEM "" /**/
t/yaml_code.yml
),
],
+ 'CUSTOMIZED' => [
+ qw( lib/CPAN.pm ),
+ ],
},
# Note: When updating CPAN-Meta the META.* files will need to be regenerated
},
'Module::CoreList' => {
- 'DISTRIBUTION' => 'BINGOS/Module-CoreList-5.20150420.tar.gz',
+ 'DISTRIBUTION' => 'BINGOS/Module-CoreList-5.20150720.tar.gz',
'FILES' => q[dist/Module-CoreList],
},
},
'Win32' => {
- 'DISTRIBUTION' => "JDB/Win32-0.51.tar.gz",
+ 'DISTRIBUTION' => "JDB/Win32-0.52.tar.gz",
'FILES' => q[cpan/Win32],
},
ingo_weinhold\100gmx.de bonefish\100cs.tu-berlin.de
james\100mastros.biz theorb\100desert-island.me.uk
-jand\100activestate.com jan.dubois\100ibm.net
+jan\100jandubois.com jand\100activestate.com
++ jan.dubois\100ibm.net
japhy\100pobox.com japhy\100pobox.org
+ japhy\100perlmonk.org
+ japhy\100cpan.org
api_version='22'
api_versionstring='5.22.0'
ar='ar'
-archlib='/pro/lib/perl5/5.22.0/i686-linux-64int'
-archlibexp='/pro/lib/perl5/5.22.0/i686-linux-64int'
+archlib='/pro/lib/perl5/5.22.1/i686-linux-64int'
+archlibexp='/pro/lib/perl5/5.22.1/i686-linux-64int'
archname64='64int'
archname='i686-linux-64int'
archobjs=''
incpth='/usr/lib/gcc/i586-suse-linux/4.8/include /usr/local/include /usr/lib/gcc/i586-suse-linux/4.8/include-fixed /usr/lib/gcc/i586-suse-linux/4.8/../../../../i586-suse-linux/include /usr/include'
inews=''
initialinstalllocation='/pro/bin'
-installarchlib='/pro/lib/perl5/5.22.0/i686-linux-64int'
+installarchlib='/pro/lib/perl5/5.22.1/i686-linux-64int'
installbin='/pro/bin'
installhtml1dir=''
installhtml3dir=''
installman3dir='/pro/local/man/man3'
installprefix='/pro'
installprefixexp='/pro'
-installprivlib='/pro/lib/perl5/5.22.0'
+installprivlib='/pro/lib/perl5/5.22.1'
installscript='/pro/bin'
-installsitearch='/pro/lib/perl5/site_perl/5.22.0/i686-linux-64int'
+installsitearch='/pro/lib/perl5/site_perl/5.22.1/i686-linux-64int'
installsitebin='/pro/bin'
installsitehtml1dir=''
installsitehtml3dir=''
-installsitelib='/pro/lib/perl5/site_perl/5.22.0'
+installsitelib='/pro/lib/perl5/site_perl/5.22.1'
installsiteman1dir='/pro/local/man/man1'
installsiteman3dir='/pro/local/man/man3'
installsitescript='/pro/bin'
perl_static_inline='static __inline__'
perladmin='hmbrand@cpan.org'
perllibs='-lnsl -ldl -lm -lcrypt -lutil -lc'
-perlpath='/pro/bin/perl5.22.0'
+perlpath='/pro/bin/perl5.22.1'
pg='pg'
phostname='hostname'
pidtype='pid_t'
pr=''
prefix='/pro'
prefixexp='/pro'
-privlib='/pro/lib/perl5/5.22.0'
-privlibexp='/pro/lib/perl5/5.22.0'
+privlib='/pro/lib/perl5/5.22.1'
+privlibexp='/pro/lib/perl5/5.22.1'
procselfexe='"/proc/self/exe"'
prototype='define'
ptrsize='4'
sig_num_init='0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 6, 17, 29, 31, 0'
sig_size='69'
signal_t='void'
-sitearch='/pro/lib/perl5/site_perl/5.22.0/i686-linux-64int'
-sitearchexp='/pro/lib/perl5/site_perl/5.22.0/i686-linux-64int'
+sitearch='/pro/lib/perl5/site_perl/5.22.1/i686-linux-64int'
+sitearchexp='/pro/lib/perl5/site_perl/5.22.1/i686-linux-64int'
sitebin='/pro/bin'
sitebinexp='/pro/bin'
sitehtml1dir=''
sitehtml1direxp=''
sitehtml3dir=''
sitehtml3direxp=''
-sitelib='/pro/lib/perl5/site_perl/5.22.0'
+sitelib='/pro/lib/perl5/site_perl/5.22.1'
sitelib_stem='/pro/lib/perl5/site_perl'
-sitelibexp='/pro/lib/perl5/site_perl/5.22.0'
+sitelibexp='/pro/lib/perl5/site_perl/5.22.1'
siteman1dir='/pro/local/man/man1'
siteman1direxp='/pro/local/man/man1'
siteman3dir='/pro/local/man/man3'
ssizetype='ssize_t'
st_ino_sign='1'
st_ino_size='8'
-startperl='#!/pro/bin/perl5.22.0'
+startperl='#!/pro/bin/perl5.22.1'
startsh='#!/bin/sh'
static_ext=' '
stdchar='char'
strerror_r_proto='0'
strings='/usr/include/string.h'
submit=''
-subversion='0'
+subversion='1'
sysman='/usr/share/man/man1'
sysroot=''
tail=''
vendorprefixexp=''
vendorscript=''
vendorscriptexp=''
-version='5.22.0'
-version_patchlevel_string='version 22 subversion 0'
+version='5.22.1'
+version_patchlevel_string='version 22 subversion 1'
versiononly='define'
vi=''
xlibpth='/usr/lib/386 /lib/386'
zip='zip'
PERL_REVISION=5
PERL_VERSION=22
-PERL_SUBVERSION=0
+PERL_SUBVERSION=1
PERL_API_REVISION=5
PERL_API_VERSION=22
PERL_API_SUBVERSION=0
* This symbol contains the ~name expanded version of ARCHLIB, to be used
* in programs that are not prepared to deal with ~ expansion at run-time.
*/
-#define ARCHLIB "/pro/lib/perl5/5.22.0/i686-linux-64int-ld" /**/
-#define ARCHLIB_EXP "/pro/lib/perl5/5.22.0/i686-linux-64int-ld" /**/
+#define ARCHLIB "/pro/lib/perl5/5.22.1/i686-linux-64int-ld" /**/
+#define ARCHLIB_EXP "/pro/lib/perl5/5.22.1/i686-linux-64int-ld" /**/
/* ARCHNAME:
* This symbol holds a string representing the architecture name.
* This symbol contains the ~name expanded version of PRIVLIB, to be used
* in programs that are not prepared to deal with ~ expansion at run-time.
*/
-#define PRIVLIB "/pro/lib/perl5/5.22.0" /**/
-#define PRIVLIB_EXP "/pro/lib/perl5/5.22.0" /**/
+#define PRIVLIB "/pro/lib/perl5/5.22.1" /**/
+#define PRIVLIB_EXP "/pro/lib/perl5/5.22.1" /**/
/* PTRSIZE:
* This symbol contains the size of a pointer, so that the C preprocessor
* This symbol contains the ~name expanded version of SITEARCH, to be used
* in programs that are not prepared to deal with ~ expansion at run-time.
*/
-#define SITEARCH "/pro/lib/perl5/site_perl/5.22.0/i686-linux-64int-ld" /**/
-#define SITEARCH_EXP "/pro/lib/perl5/site_perl/5.22.0/i686-linux-64int-ld" /**/
+#define SITEARCH "/pro/lib/perl5/site_perl/5.22.1/i686-linux-64int-ld" /**/
+#define SITEARCH_EXP "/pro/lib/perl5/site_perl/5.22.1/i686-linux-64int-ld" /**/
/* SITELIB:
* This symbol contains the name of the private library for this package.
* removed. The elements in inc_version_list (inc_version_list.U) can
* be tacked onto this variable to generate a list of directories to search.
*/
-#define SITELIB "/pro/lib/perl5/site_perl/5.22.0" /**/
-#define SITELIB_EXP "/pro/lib/perl5/site_perl/5.22.0" /**/
+#define SITELIB "/pro/lib/perl5/site_perl/5.22.1" /**/
+#define SITELIB_EXP "/pro/lib/perl5/site_perl/5.22.1" /**/
#define SITELIB_STEM "/pro/lib/perl5/site_perl" /**/
/* SSize_t:
* script to make sure (one hopes) that it runs with perl and not
* some shell.
*/
-#define STARTPERL "#!/pro/bin/perl5.22.0" /**/
+#define STARTPERL "#!/pro/bin/perl5.22.1" /**/
/* HAS_STDIO_STREAM_ARRAY:
* This symbol, if defined, tells that there is an array
=head1 EPIGRAPHS
+=head2 v5.23.5 - utastro!nather (Ed Nather), "The Story of Mel", in net.jokes, May 21, 1983.
+
+L<Announced on 2015-11-20 by Abigail|http://www.nntp.perl.org/group/perl.perl5.porters/2015/11/msg232758.html>
+
+After Mel had left the company for greener pa$ture$, the Big Boss asked
+me to look at the code and see if I could find the test and reverse it.
+Somewhat reluctantly, I agreed to look. Tracking Mel's code was a real
+adventure.
+
+I have often felt that programming is an art form, whose real value can
+only be appreciated by another versed in the same arcane art; there are
+lovely gems and brilliant coups hidden from human view and admiration,
+sometimes forever, by the very nature of the process. You can learn a
+lot about an individual just by reading through his code, even in
+hexadecimal. Mel was, I think, an unsung genius.
+
+Perhaps my greatest shock came when I found an innocent loop that had
+no test in it. No test. None. Common sense said it had to be a closed
+loop, where the program would circle, forever, endlessly. Program
+control passed right through it, however, and safely out the other side.
+It took me two weeks to figure it out.
+
+The RPC-4000 computer had a really modern facility called an index
+register. It allowed the programmer to write a program loop that used
+an indexed instruction inside; each time through, the number in the
+index register was added to the address of that instruction, so it
+would refer to the next datum in a series. He had only to increment
+the index register each time through. Mel never used it.
+
+Instead, he would pull the instruction into a machine register, add one
+to its address, and store it back. He would then execute the modified
+instruction right from the register. The loop was written so this
+additional execution time was taken into account -- just as this
+instruction finished, the next one was right under the drum's read head,
+ready to go. But the loop had no test in it.
+
+The vital clue came when I noticed the index register bit, the bit that
+lay between the address and the operation code in the instruction word,
+was turned on -- yet Mel never used the index register, leaving it zero
+all the time. When the light went on it nearly blinded me.
+
+He had located the data he was working on near the top of memory -- the
+largest locations the instructions could address -- so, after the last
+datum was handled, incrementing the instruction address would make it
+overflow. The carry would add one to the operation code, changing it to
+the next one in the instruction set: a jump instruction. Sure enough,
+the next program instruction was in address location zero, and the
+program went happily on its way.
+
+=head2 v5.23.4 - Denis Diderot, trans. David Coward, "Jacques the Fatalist"
+
+L<Announced on 2015-10-20 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/10/msg232040.html>
+
+Well, everybody's got a dog. The prime minister is the king's dog. The
+first secretary is the prime minister's dog. A wife is a husband's dog,
+or a husband is a wife's dog. Favourite is Madame So-and-so's dog and
+Thibaut is the man on the corner's dog. When my Master tells me to talk
+when I'd prefer not to, which to be honest doesn't happen very often,
+when he tells me to shut up when I feel like talking, which I find very
+difficult, when he asks me to tell the story of my love-life and then
+keeps interrupting, what am I if not his dog? Weak men are the dogs of
+strong men.
+
+=head2 v5.23.3 - Oliver Wendell Holmes, "The Deacon’s Masterpiece or The Wonderful 'One-Hoss Shay': A Logical Story"
+
+L<Announced on 2015-09-20 by Peter Martini|http://www.nntp.perl.org/group/perl.perl5.porters/2015/09/msg231173.html>
+
+ Little of of all we value here
+ Wakes on the morn of its hundredth year
+ Without both feeling and looking queer.
+ In fact, there’s nothing that keeps its youth,
+ So far as I know, but a tree and truth.
+ (This is a moral that runs at large;
+ Take it. — You’re welcome. — No extra charge.)
+
+=head2 v5.23.2 - Blind Guardian, "Skalds and Shadows"
+
+L<Announced on 2015-08-20 by Matthew Horsfall|http://www.nntp.perl.org/group/perl.perl5.porters/2015/08/msg230298.html>
+
+ Would you believe in a night like this
+ A night like this, when visions come true
+ Would you believe in a tale like this
+ A lay of bliss, praise in the old lore
+ Come to the blazing fire and
+
+ See me in the shadows
+ See me in the shadows
+ Songs I will sing
+ Of runes and rings
+ Just hand me my harp
+ This night turns into myth
+ Nothing seems real
+ You soon will feel
+ The world we live in is another skald's
+ Dream in the shadows
+ Dream in the shadows
+
+ Do you believe there is sense in it
+ Is it truth or myth?
+ They´re one in my rhymes
+ Nobody knows the meaning behind
+ The weaver's line
+ Well nobody else but the Norns can
+ See through the blazing fires of time and
+ All things will proceed as the
+ Child of the hallowed
+ Will speak to you now
+
+ See me in the shadows
+ See me in the shadows
+ Songs I will sing of tribes and kings
+ The carrion bird and the hall of the slain
+ Nothing seems real
+ You soon will feel
+ The world we live in is another skald´s
+ Dream in the shadows
+ Dream in the shadows
+
+ Do not fear for my reason
+ There's nothing to hide
+ How bitter your treason
+ How bitter the lie
+ Remember the runes and remember the light
+ All I ever want is to be at your side
+ We'll gladden the raven now I will
+ Run through the blazing fires
+ That's my choice
+ Cause things shall proceed as foreseen
+
+=head2 v5.23.1 - Elizabeth Haydon, "The Assassin King"
+
+L<Announced on 2015-07-20 by Matthew Horsfall|http://www.nntp.perl.org/group/perl.perl5.porters/2015/07/msg229413.html>
+
+ I was born beneath this willow,
+ Where my sire the earth did farm
+ Had the green grass as my pillow
+ The east wind as a blanket warm.
+
+ But away! away! called the wind from the west
+ And in answer I did run
+ Seeking glory and adventure
+ Promised by the rising sun.
+
+ I found love beneath this willow,
+ As true a love as life could hold,
+ Pledged my heart and swore my fealty
+ Sealed with a kiss and a band of gold.
+
+ But to arms! to arms! called the wind from the west
+ In faithful answer I did run
+ Marching forth for king and country
+ In battles 'neath the midday sun.
+
+ Oft I dreamt of that fair willow
+ As the seven seas I plied
+ And the girl who I left waiting
+ Longing to be at her side.
+
+ But about! about! called the wind from the west
+ As once again my ship did run
+ Down the coast, about the wide world
+ Flying sails in the setting sun.
+
+ Now I lie beneath the willow
+ Now at last no more to roam,
+ My bride and earth so tightly hold me
+ In their arms I'm finally home.
+
+ While away! away! calls the wind from the west
+ Beyond the grave my spirit, free
+ Will chase the sun into the morning
+ Beyond the sky, beyond the sea.
+
+=head2 v5.23.0 - Bob Dylan, Maggie's Farm
+
+L<Announced on 2015-06-20 by Ricardo Signes|http://www.nntp.perl.org/group/perl.perl5.porters/2015/06/msg228807.html>
+
+ I ain't gonna work on Maggie's farm no more
+ I ain't gonna work on Maggie's farm no more
+ Well, I try my best
+ To be just like I am
+ But everybody wants you
+ To be just like them
+ They sing while you slave and I just get bored
+ I ain't gonna work on Maggie's farm no more
+
+=head2 v5.22.1-RC4 - Wilhelm Müller, trans. Anon., "The Signpost" (No. 20 in Schubert's song-cycle, "Winterreise")
+
+L<Announced on 2015-12-08 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/12/msg233215.html>
+
+ Why do I shun all those highways
+ Which the other wanderer seeks?
+ Why do I find bridged by-ways
+ Through snow-covered deep creeks?
+
+ For I have no crime committed,
+ Why I should now run from men,--
+ What demented heart's desire
+ Drives me to a desert glen?
+
+ Signposts on all highways stationed
+ Point their signs toward the towns,
+ Whilst I wonder 'yond moderation,
+ Without rest, yet seeking rest!
+
+ One such signpost I see planted
+ Of my question unconcerned,
+ One road must my choice be granted,
+ Whence no man has yet returned!
+
+=head2 v5.22.1-RC3 - Wilhelm Müller, trans. Anon., "Stormy Morning" (No. 18 in Schubert's song-cycle, "Winterreise")
+
+L<Announced on 2015-12-02 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/12/msg233032.html>
+
+ How the storm tore rents
+ In heavens gray attired!
+ The rags of cloud are flying
+ Around, of combat tired.
+
+ And flames of fire lambent,
+ Fly between them and part,
+ That 's what I call a morning,
+ A morning after my heart!
+
+ My heart sees in the heavens
+ Its own picture unspoilt--
+ It's nothing but the Winter,
+ The Winter, cold and wild.
+
+=head2 v5.22.1-RC2 - Wilhelm Müller, trans. Anon., "The Old Head" (No. 14 in Schubert's song-cycle, "Winterreise")
+
+L<Announced on 2015-11-15 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/11/msg232632.html>
+
+ The hoary frost has a white sheen
+ Strewn all over my hair,
+ So I thought I was an old man
+ And thought life dealt me fair.
+
+ Yet soon was thawed my old white mane,
+ And I have my black hair again.
+ How I abhor my young fair years,
+ How long to wait for death and biers?
+
+ From setting sun to morning's hue
+ Many a head turns white.
+ Who'll credit it? My hair did not
+ In all this lifelong plight!
+
+=head2 v5.22.1-RC1 - Wilhelm Müller, trans. Anon., "Will-o'-the Wisp" (No. 9 in Schubert's song-cycle, "Winterreise")
+
+L<Announced on 2015-10-31 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/10/msg232321.html>
+
+ In the deepest rocky crevice
+ A will-o'-the wisp lured me;
+ How I could find my way from here,
+ For me it's easy memory!
+
+ For I am used to straying ways,
+ Every path to th'end a way,
+ All our joys and all our suffering,--
+ To a will-o'-the wisp it 's all play!
+
+ Through the dried-up bed of torrents
+ I quite calmly downward stroll;
+ Every stream its sea will enter,
+ Every suffering finds its goal!
+
+=head2 v5.22.0 - Gene Wolfe, The Citadel of the Autarch
+
+L<Announced on 2015-06-01 by Ricardo Signes|http://www.nntp.perl.org/group/perl.perl5.porters/2015/06/msg228300.html>
+
+“You are the advocate of the dead.”
+
+The old man nodded. “I am. People talk about being fair to this one and
+that one, but nobody I ever heard talks about doing right by them. We
+take everything they had, which is all right. And spit, most often, on
+their opinions, which I suppose is all right too. But we ought to
+remember now and then how much of what we have we got from them. I
+figure while I’m still here I ought to put a word in for them.”
+
=head2 v5.22.0-RC2 - T.S. Eliot, unpublished work
L<Announced on 2015-05-21 by Ricardo Signes|http://www.nntp.perl.org/group/perl.perl5.porters/2015/05/msg228142.html>
Till the work its master honour.
Blessing comes from Heaven’s Donor.
+=head2 v5.20.3 - Elias Lönnrot, trans. Keith Bosley, "The Kalevala", Canto 42: Stealing the Sampo
+
+L<Announced on 2015-09-12 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/09/msg230945.html>
+
+ Steady old Väinämöinen
+ uttered a word and spoke thus:
+ 'No lilting on the waters
+ and no singing on the waves!
+ Song keeps you lazy
+ tales delay rowing.
+ Precious day would pass and night
+ would overtake us midway
+ on these wide waters
+ upon these vast waves.'
+
+ The wanton Lemminkäinen
+ uttered a word and spoke thus:
+ 'The time will pass anyway
+ the fair day will flee
+ and the night will come panting
+ and the twilight will steal in
+ if you don't sing while you live
+ nor hum in this world.'
+
+=head2 v5.20.3-RC2 - Anon., trans. Malcolm C. Lyons, "The Story of Abu Muhammad the Idle and the Marvels He Encountered with the Ape As Well As the Marvels of the Seas and Islands", from "Tales of the Marvellous and News of the Strange"
+
+L<Announced on 2015-08-29 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/08/msg230544.html>
+
+'I fled from Basra, sad and tearful, with no idea where I was going,
+and I was reciting these lines:
+
+ The pain of parting makes me melt away,
+ As lovers do when those they love are harsh.
+ I wonder at the patience that I showed
+ When I had lost my love, for that was wonderful.
+ Beloved, do you know that since you left,
+ I have remained confused in misery.
+
+I then heard a voice that said: "Damn you, have you no fear of
+Almighty God that you hand over a girl to an unbelieving 'ifrit?" I
+walked for a time amongst the palm-trees until I caught sight of a
+person, whom I approached. When I asked him who he was he said: "I
+am one of the jinn who were converted to Islam at the hands of 'Ali
+ibn Abi Talib, may God ennoble him." "How can I get to my wife?" I
+asked him, and he said: "Wretched fellow, you had a bird which you
+allowed to fly away and now you want to fly after it." But he
+added: "Follow this road with God's blessing all night until dawn
+and then by the shore you will see a huge cave in which there is an
+idol made of white stone. You must drink of the water that there is
+coming out of the cave and smear your face with its mud. Stay there
+and a barge will pass you as you stand opposite the statue. Various
+different creatures will emerge, heads without bodies and bodies
+without heads, and they will prostrate themselves in adoration to
+the idol rather than to Almighty God. When you see that, embark on
+the barge and cross to the other bank and walk along it until
+sunset. On a high point you will see a castle built of bricks of
+gold and silver. That is where your 'ifrit will be. I have now
+told you about this, so goodbye."
+
+=head2 v5.20.3-RC1 - Anon., trans. Malcolm C. Lyons, "The Story of Abu Muhammad the Idle and the Marvels He Encountered with the Ape As Well As the Marvels of the Seas and Islands", from "Tales of the Marvellous and News of the Strange"
+
+L<Announced on 2015-08-22 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/08/msg230359.html>
+
+'On the night of the wedding the ape came to sit in front of me and
+asked me what I intended to do. "Whatever you tell me," I replied,
+and he said: "Take care not to covet the girl, or I shall come back
+and burn you up and leave you as a lesson for those who can learn."
+I agreed to this and when evening came I found the world full of
+candles and torches burning in holders of gold and silver. There
+were servants and serving girls, and everyone who saw me
+congratulated me on my good fortune, as there was no girl on the
+face of the earth more beautiful than my bride.
+[...]
+'Next morning I went out to the market, and people went in and asked
+her how the night had been. "He never looked up at me," she told
+them. Then, when it was afternoon, I went to my house, where the
+ape was sitting by the door. "Tell me what you did," it said, and I
+told it: "By God, I did not learn and do not know whether this was a
+man or a girl." "That's what I want," it said.
+[...]
+'On the second night my bride was brought to me, after which the
+servants left her and went away. She fell asleep, and, while she
+was sleeping, I killed the cock, wrapped it in the cloth and put the
+four poles from the couch over it. Suddenly there was a huge crash
+like a peal of thunder and a fiery 'ifrit swooped on the girl. I
+fainted at the sight and when I recovered I heard a voice saying:
+"By the Lord of the Ka'ba, the girl has been carried off!" and there
+was a sound like the rustling of wind and bitter weeping. At this I
+shed tears, struck my head and was filled with regret when it was no
+longer of any use, for to me the whole world was worth no more than
+a bean.
+
=head2 v5.20.2 - Jonathan "Jonti" Picking, L<"Magical Trevor"|http://www.weebls-stuff.com/other-toons/video/magical-trevor.html>
L<Announced on 2015-02-14 by Steve Hay|http://www.nntp.perl.org/group/perl.perl5.porters/2015/02/msg225777.html>
perlapi.c
cpan/Devel-PPPort/module2.c
cpan/Devel-PPPort/module3.c
+ cpan/autodie/t/touch_me
reentr.c
reentr.h
regcharclass.h
XXX Generate this with:
- perl Porting/acknowledgements.pl v5.22.0..HEAD
+ perl Porting/acknowledgements.pl v5.22.1..HEAD
=head1 Reporting Bugs
After editing, regenerate uconfig.h (this must be run on a system with a
/bin/sh available):
- $ perl regen/uconfig_h.pl
+ $ perl regen/uconfig_h.pl
This might not cause any new changes.
You may also need to regen opcodes:
- $ ./perl -Ilib regen/opcode.pl
+ $ ./perl -Ilib regen/opcode.pl
You may have to add stub entries in C<%Module::CoreList::version>,
C<%Module::CoreList::deprecated> and C<%Module::CoreList::Utils::delta>.
Test your changes:
- $ git clean -xdf # careful if you don't have local files to keep!
- $ ./Configure -des -Dusedevel
- $ make
- $ make test
+ $ git clean -xdf # careful if you don't have local files to keep!
+ $ ./Configure -des -Dusedevel
+ $ make
+ $ make test
Commit your changes:
- $ git status
- $ git diff
- B<review the delta carefully>
+ $ git status
+ $ git diff
+ B<review the delta carefully>
- $ git commit -a -m 'Bump the perl version in various places for 5.x.y'
+ $ git commit -a -m 'Bump the perl version in various places for 5.x.y'
At this point you may want to compare the commit with a previous bump to
see if they look similar. See commit f7cf42bb69 for an example of a
for modules that have identical version numbers but different contents by
running:
- $ ./perl Porting/cmpVERSION.pl --tag=v5.X.YY
+ $ ./perl -Ilib Porting/cmpVERSION.pl --tag=v5.X.YY
(This is done automatically by F<t/porting/cmp_version.t> for the previous
release of the current branch, but not for any releases from other branches.)
=head4 Add Module::CoreList version bump to perldelta
-Add a perldelta entry for the new Module::CoreList version.
+Add a perldelta entry for the new Module::CoreList version. You only
+need to do this if you want to add notes about the changes included
+with this version of Module::CoreList. Otherwise, its version bump
+will be automatically filled in below in L<finalize perldelta>.
=for checklist skip RC
commits. (Note that for an odd-numbered version, perl will install
itself as C<perl5.x.y>). C<perl -v> will identify itself as:
- This is perl 5, version X, subversion Y (v5.X.Y (v5.X.Z-NNN-gdeadbeef))
+ This is perl 5, version X, subversion Y (v5.X.Y (v5.X.Z-NNN-gdeadbeef))
where 5.X.Z is the latest tag, NNN the number of commits since this tag,
and C<< deadbeef >> commit of that tag.
Create a tarball. Use the C<-s> option to specify a suitable suffix for
the tarball and directory name:
- $ cd root/of/perl/tree
- $ make distclean # make sure distclean works
- $ git clean -xdf # make sure perl and git agree on files
- # git clean should not output anything!
- $ git status # and there's nothing lying around
+ $ cd root/of/perl/tree
+ $ make distclean # make sure distclean works
+ $ git clean -xdf # make sure perl and git agree on files
+ # git clean should not output anything!
+ $ git status # and there's nothing lying around
- $ perl Porting/makerel -bx -s RC1 # for a release candidate
- $ perl Porting/makerel -bx # for the release itself
+ $ perl Porting/makerel -bx -s RC1 # for a release candidate
+ $ perl Porting/makerel -bx # for the release itself
This creates the directory F<../perl-x.y.z-RC1> or similar, copies all
the MANIFEST files into it, sets the correct permissions on them, then
Check that the test harness and install work on each test machine:
- $ make distclean
- $ ./Configure -des -Dprefix=/install/path && make all test_harness install
- $ cd /install/path
+ $ make distclean
+ $ ./Configure -des -Dprefix=/install/path && make all test_harness install
+ $ cd /install/path
=head4 Check C<perl -v> and C<perl -V>
Copy the perldelta.pod for this release into blead; for example:
- $ cd ..../blead
- $ cp -i ../5.10.x/pod/perldelta.pod pod/perl5101delta.pod # for example
- $ git add pod/perl5101delta.pod
+ $ cd ..../blead
+ $ cp -i ../5.10.x/pod/perldelta.pod pod/perl5101delta.pod #for example
+ $ git add pod/perl5101delta.pod
Don't forget to set the NAME correctly in the new file (e.g. perl5101delta
rather than perldelta).
Run
- $ ./perl -Ilib -MModule::CoreList \
- -le 'print Module::CoreList->find_version($]) ? "ok" : "not ok"'
+ $ ./perl -Ilib -MModule::CoreList \
+ -le 'print Module::CoreList->find_version($]) ? "ok" : "not ok"'
and check that it outputs "ok" to prove that Module::CoreList now knows
about blead's current version.
On these systems, it might be the default compilation mode, and there
is currently no guarantee that passing no use64bitall option to the
Configure process will build a 32bit perl. Implementing -Duse32bit*
-options would be nice for perl 5.22.0.
+options would be nice for perl 5.22.1.
=head2 Profile Perl - am I hot or not?
=head1 Big projects
Tasks that will get your name mentioned in the description of the "Highlights
-of 5.22.0"
+of 5.22.1"
=head2 make ithreads more robust
Make perl executable and create a symlink for libperl:
chmod a+x /boot/common/bin/perl
- cd /boot/common/lib; ln -s perl5/5.22.0/BePC-haiku/CORE/libperl.so .
+ cd /boot/common/lib; ln -s perl5/5.22.1/BePC-haiku/CORE/libperl.so .
-Replace C<5.22.0> with your respective version of Perl.
+Replace C<5.22.1> with your respective version of Perl.
=head1 KNOWN PROBLEMS
This document briefly describes Perl under Mac OS X.
- curl -O http://www.cpan.org/src/perl-5.22.0.tar.gz
- tar -xzf perl-5.22.0.tar.gz
- cd perl-5.22.0
+ curl -O http://www.cpan.org/src/perl-5.22.1.tar.gz
+ tar -xzf perl-5.22.1.tar.gz
+ cd perl-5.22.1
./Configure -des -Dprefix=/usr/local/
make
make test
=head1 DESCRIPTION
-The latest Perl release (5.22.0 as of this writing) builds without changes
+The latest Perl release (5.22.1 as of this writing) builds without changes
under all versions of Mac OS X from 10.3 "Panther" onwards.
In order to build your own version of Perl you will need 'make',
=item Additional Perl modules
- unzip perl_ste.zip -d f:/perllib/lib/site_perl/5.22.0/
+ unzip perl_ste.zip -d f:/perllib/lib/site_perl/5.22.1/
Same remark as above applies. Additionally, if this directory is not
one of directories on @INC (and @INC is influenced by C<PERLLIB_PREFIX>), you
choice. Once you have done so, use a command like the following to
unpack the archive:
- vmstar -xvf perl-5^.22^.0.tar
+ vmstar -xvf perl-5^.22^.1.tar
Then set default to the top-level source directory like so:
- set default [.perl-5^.22^.0]
+ set default [.perl-5^.22^.1]
and proceed with configuration as described in the next section.
Microsoft Visual C++ version 6.0 or later
Intel C++ Compiler (experimental)
Gcc by mingw.org gcc version 3.4.5 or later
- Gcc by mingw-w64.sf.net gcc version 4.4.3 or later
+ Gcc by mingw-w64.org gcc version 4.4.3 or later
Note that the last two of these are actually competing projects both
delivering complete gcc toolchain for MS Windows:
Delivers gcc toolchain targeting 32-bit Windows platform.
-=item L<http://mingw-w64.sf.net>
+=item L<http://mingw-w64.org>
Delivers gcc toolchain targeting both 64-bit Windows and 32-bit Windows
platforms (despite the project name "mingw-w64" they are not only 64-bit
MinGW64 compiler (gcc version 4.4.3 or later)
The Windows SDK can be downloaded from L<http://www.microsoft.com/>.
-The MinGW64 compiler is available at L<http://sourceforge.net/projects/mingw-w64>.
+The MinGW64 compiler is available at L<http://mingw-w64.org>.
The latter is actually a cross-compiler targeting Win64. There's also a trimmed
down compiler (no java, or gfortran) suitable for building perl available at:
L<http://strawberryperl.com/package/kmx/64_gcctoolchain/>
CCHOME points to wherever you installed your compiler.
If building with the cross-compiler provided by
-mingw-w64.sourceforge.net you'll need to uncomment the line that sets
+mingw-w64.org you'll need to uncomment the line that sets
GCCCROSS in the makefile.mk. Do this only if it's the cross-compiler - ie
only if the bin folder doesn't contain a gcc.exe. (The cross-compiler
does not provide a gcc.exe, g++.exe, ar.exe, etc. Instead, all of these
/*
=for apidoc av_clear
-Clears an array, making it empty. Does not free the memory the av uses to
-store its list of scalars. If any destructors are triggered as a result,
-the av itself may be freed when this function returns.
+Frees the all the elements of an array, leaving it empty.
+The XS equivalent of C<@array = ()>. See also L</av_undef>.
-Perl equivalent: C<@myarray = ();>.
+Note that it is possible that the actions of a destructor called directly
+or indirectly by freeing an element of the array could cause the reference
+count of the array itself to be reduced (e.g. by deleting an entry in the
+symbol table). So it is a possibility that the AV could have been freed
+(or even reallocated) on return from the call unless you hold a reference
+to it.
=cut
*/
/*
=for apidoc av_undef
-Undefines the array. Frees the memory used by the av to store its list of
-scalars. If any destructors are triggered as a result, the av itself may
-be freed.
+Undefines the array. The XS equivalent of C<undef(@array)>.
+
+As well as freeing all the elements of the array (like C<av_clear()>), this
+also frees the memory used by the av to store its list of scalars.
+
+See L</av_clear> for a note about the array possibly being invalid on
+return.
=cut
*/
# Code to set any extra flags here.
extra=''
+# Protect double or single quotes for better restoring of ccflags.
+myccflags=`echo $ccflags | sed -e 's/"/\\\"/g' -e "s/'/\\\'/g"`
+
echo "Extracting cflags (with variable substitutions)"
# This section of the file will have variable substitutions done on it.
# Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
# This file is generated by cflags.SH
# Used to restore possible edits by cflags.SH.
-myccflags="$ccflags"
+myccflags="$myccflags"
+
# Extra warnings, used e.g. for gcc.
warn="$warn"
# Extra standardness.
require DynaLoader;
@ISA = qw|Exporter DynaLoader|;
- $VERSION = '0.51';
+ $VERSION = '0.52';
$XS_VERSION = $VERSION;
$VERSION = eval $VERSION;
sub PRODUCT_MEDIUMBUSINESS_SERVER_SECURITY () { 0x01F } # Windows Essential Business Server Security Server
sub PRODUCT_MEDIUMBUSINESS_SERVER_MESSAGING () { 0x020 } # Windows Essential Business Server Messaging Server
sub PRODUCT_SERVER_FOUNDATION () { 0x021 } # Server Foundation
-
+#define PRODUCT_HOME_PREMIUM_SERVER 0x00000022
sub PRODUCT_SERVER_FOR_SMALLBUSINESS_V () { 0x023 } # Windows Server 2008 without Hyper-V for Windows Essential Server Solutions
sub PRODUCT_STANDARD_SERVER_V () { 0x024 } # Server Standard without Hyper-V (full installation)
sub PRODUCT_DATACENTER_SERVER_V () { 0x025 } # Server Datacenter without Hyper-V (full installation)
sub PRODUCT_STANDARD_SERVER_CORE_V () { 0x028 } # Server Standard without Hyper-V (core installation)
sub PRODUCT_ENTERPRISE_SERVER_CORE_V () { 0x029 } # Server Enterprise without Hyper-V (core installation)
sub PRODUCT_HYPERV () { 0x02A } # Microsoft Hyper-V Server
-
+#define PRODUCT_STORAGE_EXPRESS_SERVER_CORE 0x0000002B
+#define PRODUCT_STORAGE_STANDARD_SERVER_CORE 0x0000002C
+#define PRODUCT_STORAGE_WORKGROUP_SERVER_CORE 0x0000002D
+#define PRODUCT_STORAGE_ENTERPRISE_SERVER_CORE 0x0000002E
sub PRODUCT_STARTER_N () { 0x02F } # Starter N
sub PRODUCT_PROFESSIONAL () { 0x030 } # Professional
sub PRODUCT_PROFESSIONAL_N () { 0x031 } # Professional N
-
+#define PRODUCT_SB_SOLUTION_SERVER 0x00000032
+#define PRODUCT_SERVER_FOR_SB_SOLUTIONS 0x00000033
+#define PRODUCT_STANDARD_SERVER_SOLUTIONS 0x00000034
+#define PRODUCT_STANDARD_SERVER_SOLUTIONS_CORE 0x00000035
+#define PRODUCT_SB_SOLUTION_SERVER_EM 0x00000036
+#define PRODUCT_SERVER_FOR_SB_SOLUTIONS_EM 0x00000037
+#define PRODUCT_SOLUTION_EMBEDDEDSERVER 0x00000038
+#define PRODUCT_SOLUTION_EMBEDDEDSERVER_CORE 0x00000039
+#define PRODUCT_PROFESSIONAL_EMBEDDED 0x0000003A
+#define PRODUCT_ESSENTIALBUSINESS_SERVER_MGMT 0x0000003B
+#define PRODUCT_ESSENTIALBUSINESS_SERVER_ADDL 0x0000003C
+#define PRODUCT_ESSENTIALBUSINESS_SERVER_MGMTSVC 0x0000003D
+#define PRODUCT_ESSENTIALBUSINESS_SERVER_ADDLSVC 0x0000003E
+#define PRODUCT_SMALLBUSINESS_SERVER_PREMIUM_CORE 0x0000003F
+#define PRODUCT_CLUSTER_SERVER_V 0x00000040
+#define PRODUCT_EMBEDDED 0x00000041
sub PRODUCT_STARTER_E () { 0x042 } # Starter E
sub PRODUCT_HOME_BASIC_E () { 0x043 } # Home Basic E
sub PRODUCT_HOME_PREMIUM_E () { 0x044 } # Home Premium E
sub PRODUCT_PROFESSIONAL_E () { 0x045 } # Professional E
sub PRODUCT_ENTERPRISE_E () { 0x046 } # Enterprise E
sub PRODUCT_ULTIMATE_E () { 0x047 } # Ultimate E
+#define PRODUCT_ENTERPRISE_EVALUATION 0x00000048
+#define PRODUCT_MULTIPOINT_STANDARD_SERVER 0x0000004C
+#define PRODUCT_MULTIPOINT_PREMIUM_SERVER 0x0000004D
+#define PRODUCT_STANDARD_EVALUATION_SERVER 0x0000004F
+#define PRODUCT_DATACENTER_EVALUATION_SERVER 0x00000050
+#define PRODUCT_ENTERPRISE_N_EVALUATION 0x00000054
+#define PRODUCT_EMBEDDED_AUTOMOTIVE 0x00000055
+#define PRODUCT_EMBEDDED_INDUSTRY_A 0x00000056
+#define PRODUCT_THINPC 0x00000057
+#define PRODUCT_EMBEDDED_A 0x00000058
+#define PRODUCT_EMBEDDED_INDUSTRY 0x00000059
+#define PRODUCT_EMBEDDED_E 0x0000005A
+#define PRODUCT_EMBEDDED_INDUSTRY_E 0x0000005B
+#define PRODUCT_EMBEDDED_INDUSTRY_A_E 0x0000005C
+#define PRODUCT_STORAGE_WORKGROUP_EVALUATION_SERVER 0x0000005F
+#define PRODUCT_STORAGE_STANDARD_EVALUATION_SERVER 0x00000060
+#define PRODUCT_CORE_ARM 0x00000061
+sub PRODUCT_CORE_N () { 0x62 } # Windows 10 Home N
+sub PRODUCT_CORE_COUNTRYSPECIFIC () { 0x63 } # Windows 10 Home China
+sub PRODUCT_CORE_SINGLELANGUAGE () { 0x64 } # Windows 10 Home Single Language
+sub PRODUCT_CORE () { 0x65 } # Windows 10 Home
+#define PRODUCT_PROFESSIONAL_WMC 0x00000067
+#define PRODUCT_MOBILE_CORE 0x00000068
+#define PRODUCT_EMBEDDED_INDUSTRY_EVAL 0x00000069
+#define PRODUCT_EMBEDDED_INDUSTRY_E_EVAL 0x0000006A
+#define PRODUCT_EMBEDDED_EVAL 0x0000006B
+#define PRODUCT_EMBEDDED_E_EVAL 0x0000006C
+#define PRODUCT_NANO_SERVER 0x0000006D
+#define PRODUCT_CLOUD_STORAGE_SERVER 0x0000006E
+#define PRODUCT_CORE_CONNECTED 0x0000006F
+#define PRODUCT_PROFESSIONAL_STUDENT 0x00000070
+#define PRODUCT_CORE_CONNECTED_N 0x00000071
+#define PRODUCT_PROFESSIONAL_STUDENT_N 0x00000072
+#define PRODUCT_CORE_CONNECTED_SINGLELANGUAGE 0x00000073
+#define PRODUCT_CORE_CONNECTED_COUNTRYSPECIFIC 0x00000074
+#define PRODUCT_CONNECTED_CAR 0x00000075
+#define PRODUCT_INDUSTRY_HANDHELD 0x00000076
+#define PRODUCT_PPI_PRO 0x00000077
+#define PRODUCT_ARM64_SERVER 0x00000078
+sub PRODUCT_EDUCATION () { 0x79 } # Windows 10 Education
+sub PRODUCT_EDUCATION_N () { 0x7A } # Windows 10 Education N
+#define PRODUCT_IOTUAP 0x0000007B
+#define PRODUCT_CLOUD_HOST_INFRASTRUCTURE_SERVER 0x0000007C
+#define PRODUCT_ENTERPRISE_S 0x0000007D
+#define PRODUCT_ENTERPRISE_S_N 0x0000007E
+#define PRODUCT_PROFESSIONAL_S 0x0000007F
+#define PRODUCT_PROFESSIONAL_S_N 0x00000080
+#define PRODUCT_ENTERPRISE_S_EVALUATION 0x00000081
+#define PRODUCT_ENTERPRISE_S_N_EVALUATION 0x00000082
sub PRODUCT_UNLICENSED () { 0xABCDABCD } # product has not been activated and is no longer in the grace period
$desc = "R2";
}
}
+ }
+ elsif ($major == 10) {
+ $os = '10';
+ }
- if ($productinfo == PRODUCT_ULTIMATE) {
+ if ($major >= 6) {
+ if ($productinfo == PRODUCT_ULTIMATE) {
$desc .= " Ultimate";
}
elsif ($productinfo == PRODUCT_HOME_PREMIUM) {
elsif ($arch == PROCESSOR_ARCHITECTURE_AMD64) {
$desc .= " (64-bit)";
}
- }
+ }
}
unless (defined $os) {
["2012", "2012", 2, 6, 2, 0x00, 2, 89 ],
["[Small Business Server] 2008 R2", "2008", 2, 6, 1, 0x09, 2, 89 ],
+["8.1", "8.1", 2, 6, 3 ],
+["2012 [R2]", "2012", 2, 6, 3, 0x00, 2, 89 ],
+
+["10", "10", 2, 10, 0 ],
+
);
my @ia64_tests = (
+5.20151213
+ - Updated for v5.22.1
+
+5.20151120
+ - Updated for v5.23.5
+
+5.20151020
+ - Updated for v5.23.4
+
+5.20150920
+ - Updated for v5.23.3
+
+5.20150912
+ - Updated for v5.20.3
+
+5.20150820
+ - Updated for v5.23.2
+
+5.20150720
+ - Updated for v5.23.1
+
5.20150520
- - Updated for v5.21.12
+ - Updated for v5.22.0
5.20150420
- Updated for v5.21.11
+ - fixes a fencepost error in is_core()
+ - copes with versions that do not match x.yyyzzz
5.20150320
- Updated for v5.21.10
%bug_tracker %deprecated %delta/;
use Module::CoreList::TieHashDelta;
use version;
-$VERSION = '5.20150520';
+$VERSION = '5.20151213';
sub _released_order { # Sort helper, to make '?' sort after everything else
(substr($released{$a}, 0, 1) eq "?")
sub find_version {
my $v = shift;
- $v = shift if eval { $v->isa(__PACKAGE__) };
+ if ($v->isa(__PACKAGE__)) {
+ $v = shift;
+ return if not defined $v;
+ }
return $version{$v} if defined $version{$v};
- return undef;
+ return;
}
sub is_deprecated {
5.021010 => '2015-03-20',
5.021011 => '2015-04-20',
5.022000 => '2015-06-01',
+ 5.023000 => '2015-06-20',
+ 5.023001 => '2015-07-20',
+ 5.023002 => '2015-08-20',
+ 5.020003 => '2015-09-12',
+ 5.023003 => '2015-09-20',
+ 5.023004 => '2015-10-20',
+ 5.023005 => '2015-11-20',
+ 5.022001 => '2015-12-13',
);
for my $version ( sort { $a <=> $b } keys %released ) {
removed => {
}
},
+ 5.023000 => {
+ delta_from => 5.022000,
+ changed => {
+ 'B::Op_private' => '5.023000',
+ 'CPAN::Meta' => '2.150005',
+ 'CPAN::Meta::Converter' => '2.150005',
+ 'CPAN::Meta::Feature' => '2.150005',
+ 'CPAN::Meta::History' => '2.150005',
+ 'CPAN::Meta::Merge' => '2.150005',
+ 'CPAN::Meta::Prereqs' => '2.150005',
+ 'CPAN::Meta::Requirements'=> '2.133',
+ 'CPAN::Meta::Spec' => '2.150005',
+ 'CPAN::Meta::Validator' => '2.150005',
+ 'CPAN::Meta::YAML' => '0.016',
+ 'Config' => '5.023',
+ 'Encode' => '2.73',
+ 'ExtUtils::CBuilder' => '0.280223',
+ 'ExtUtils::CBuilder::Base'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::Unix'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::VMS'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::Windows'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::Windows::BCC'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::Windows::GCC'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::Windows::MSVC'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::aix'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::android'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::cygwin'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::darwin'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::dec_osf'=> '0.280223',
+ 'ExtUtils::CBuilder::Platform::os2'=> '0.280223',
+ 'Fatal' => '2.27',
+ 'Getopt::Long' => '2.46',
+ 'HTTP::Tiny' => '0.056',
+ 'List::Util' => '1.42_01',
+ 'List::Util::XS' => '1.42_01',
+ 'Locale::Codes' => '3.35',
+ 'Locale::Codes::Constants'=> '3.35',
+ 'Locale::Codes::Country'=> '3.35',
+ 'Locale::Codes::Country_Codes'=> '3.35',
+ 'Locale::Codes::Country_Retired'=> '3.35',
+ 'Locale::Codes::Currency'=> '3.35',
+ 'Locale::Codes::Currency_Codes'=> '3.35',
+ 'Locale::Codes::Currency_Retired'=> '3.35',
+ 'Locale::Codes::LangExt'=> '3.35',
+ 'Locale::Codes::LangExt_Codes'=> '3.35',
+ 'Locale::Codes::LangExt_Retired'=> '3.35',
+ 'Locale::Codes::LangFam'=> '3.35',
+ 'Locale::Codes::LangFam_Codes'=> '3.35',
+ 'Locale::Codes::LangFam_Retired'=> '3.35',
+ 'Locale::Codes::LangVar'=> '3.35',
+ 'Locale::Codes::LangVar_Codes'=> '3.35',
+ 'Locale::Codes::LangVar_Retired'=> '3.35',
+ 'Locale::Codes::Language'=> '3.35',
+ 'Locale::Codes::Language_Codes'=> '3.35',
+ 'Locale::Codes::Language_Retired'=> '3.35',
+ 'Locale::Codes::Script' => '3.35',
+ 'Locale::Codes::Script_Codes'=> '3.35',
+ 'Locale::Codes::Script_Retired'=> '3.35',
+ 'Locale::Country' => '3.35',
+ 'Locale::Currency' => '3.35',
+ 'Locale::Language' => '3.35',
+ 'Locale::Script' => '3.35',
+ 'Math::BigFloat' => '1.999701',
+ 'Math::BigInt' => '1.999701',
+ 'Math::BigInt::Calc' => '1.999701',
+ 'Math::BigInt::CalcEmu' => '1.999701',
+ 'Math::BigRat' => '0.260801',
+ 'Module::CoreList' => '5.20150620',
+ 'Module::CoreList::TieHashDelta'=> '5.20150620',
+ 'Module::CoreList::Utils'=> '5.20150620',
+ 'Module::Metadata' => '1.000027',
+ 'Net::Cmd' => '3.06',
+ 'Net::Config' => '3.06',
+ 'Net::Domain' => '3.06',
+ 'Net::FTP' => '3.06',
+ 'Net::FTP::A' => '3.06',
+ 'Net::FTP::E' => '3.06',
+ 'Net::FTP::I' => '3.06',
+ 'Net::FTP::L' => '3.06',
+ 'Net::FTP::dataconn' => '3.06',
+ 'Net::NNTP' => '3.06',
+ 'Net::Netrc' => '3.06',
+ 'Net::POP3' => '3.06',
+ 'Net::SMTP' => '3.06',
+ 'Net::Time' => '3.06',
+ 'POSIX' => '1.54',
+ 'Parse::CPAN::Meta' => '1.4417',
+ 'Pod::Simple' => '3.30',
+ 'Pod::Simple::BlackBox' => '3.30',
+ 'Pod::Simple::Checker' => '3.30',
+ 'Pod::Simple::Debug' => '3.30',
+ 'Pod::Simple::DumpAsText'=> '3.30',
+ 'Pod::Simple::DumpAsXML'=> '3.30',
+ 'Pod::Simple::HTML' => '3.30',
+ 'Pod::Simple::HTMLBatch'=> '3.30',
+ 'Pod::Simple::LinkSection'=> '3.30',
+ 'Pod::Simple::Methody' => '3.30',
+ 'Pod::Simple::Progress' => '3.30',
+ 'Pod::Simple::PullParser'=> '3.30',
+ 'Pod::Simple::PullParserEndToken'=> '3.30',
+ 'Pod::Simple::PullParserStartToken'=> '3.30',
+ 'Pod::Simple::PullParserTextToken'=> '3.30',
+ 'Pod::Simple::PullParserToken'=> '3.30',
+ 'Pod::Simple::RTF' => '3.30',
+ 'Pod::Simple::Search' => '3.30',
+ 'Pod::Simple::SimpleTree'=> '3.30',
+ 'Pod::Simple::Text' => '3.30',
+ 'Pod::Simple::TextContent'=> '3.30',
+ 'Pod::Simple::TiedOutFH'=> '3.30',
+ 'Pod::Simple::Transcode'=> '3.30',
+ 'Pod::Simple::TranscodeDumb'=> '3.30',
+ 'Pod::Simple::TranscodeSmart'=> '3.30',
+ 'Pod::Simple::XHTML' => '3.30',
+ 'Pod::Simple::XMLOutStream'=> '3.30',
+ 'Pod::Usage' => '1.67',
+ 'Scalar::Util' => '1.42_01',
+ 'Socket' => '2.019',
+ 'Sub::Util' => '1.42_01',
+ 'Time::Piece' => '1.30',
+ 'Time::Seconds' => '1.30',
+ 'UNIVERSAL' => '1.13',
+ 'Unicode' => '8.0.0',
+ 'XS::APItest' => '0.73',
+ 'autodie' => '2.27',
+ 'autodie::Scope::Guard' => '2.27',
+ 'autodie::Scope::GuardStack'=> '2.27',
+ 'autodie::Util' => '2.27',
+ 'autodie::exception' => '2.27',
+ 'autodie::exception::system'=> '2.27',
+ 'autodie::hints' => '2.27',
+ 'autodie::skip' => '2.27',
+ 'encoding' => '2.15',
+ 'feature' => '1.41',
+ 'parent' => '0.234',
+ 'threads' => '2.02',
+ },
+ removed => {
+ }
+ },
+ 5.023001 => {
+ delta_from => 5.023000,
+ changed => {
+ 'B::Op_private' => '5.023001',
+ 'Config' => '5.023001',
+ 'DynaLoader' => '1.33',
+ 'Encode' => '2.75',
+ 'Encode::MIME::Header' => '2.17',
+ 'Encode::Unicode' => '2.13',
+ 'Fatal' => '2.29',
+ 'File::Path' => '2.11',
+ 'Getopt::Long' => '2.47',
+ 'I18N::Langinfo' => '0.13',
+ 'IPC::Open3' => '1.19',
+ 'Module::CoreList' => '5.20150720',
+ 'Module::CoreList::TieHashDelta'=> '5.20150720',
+ 'Module::CoreList::Utils'=> '5.20150720',
+ 'Net::Cmd' => '3.07',
+ 'Net::Config' => '3.07',
+ 'Net::Domain' => '3.07',
+ 'Net::FTP' => '3.07',
+ 'Net::FTP::A' => '3.07',
+ 'Net::FTP::E' => '3.07',
+ 'Net::FTP::I' => '3.07',
+ 'Net::FTP::L' => '3.07',
+ 'Net::FTP::dataconn' => '3.07',
+ 'Net::NNTP' => '3.07',
+ 'Net::Netrc' => '3.07',
+ 'Net::POP3' => '3.07',
+ 'Net::SMTP' => '3.07',
+ 'Net::Time' => '3.07',
+ 'Opcode' => '1.33',
+ 'POSIX' => '1.55',
+ 'PerlIO::scalar' => '0.23',
+ 'Socket' => '2.020',
+ 'Storable' => '2.54',
+ 'Unicode::Collate' => '1.14',
+ 'Unicode::Collate::CJK::Big5'=> '1.14',
+ 'Unicode::Collate::CJK::GB2312'=> '1.14',
+ 'Unicode::Collate::CJK::JISX0208'=> '1.14',
+ 'Unicode::Collate::CJK::Korean'=> '1.14',
+ 'Unicode::Collate::CJK::Pinyin'=> '1.14',
+ 'Unicode::Collate::CJK::Stroke'=> '1.14',
+ 'Unicode::Collate::CJK::Zhuyin'=> '1.14',
+ 'Unicode::Collate::Locale'=> '1.14',
+ 'Unicode::Normalize' => '1.19',
+ 'XS::APItest' => '0.74',
+ 'XS::Typemap' => '0.14',
+ 'autodie' => '2.29',
+ 'autodie::Scope::Guard' => '2.29',
+ 'autodie::Scope::GuardStack'=> '2.29',
+ 'autodie::Util' => '2.29',
+ 'autodie::exception' => '2.29',
+ 'autodie::exception::system'=> '2.29',
+ 'autodie::hints' => '2.29',
+ 'autodie::skip' => '2.29',
+ 'encoding' => '2.16',
+ 'feature' => '1.42',
+ 'warnings' => '1.33',
+ },
+ removed => {
+ 'autodie::ScopeUtil' => 1,
+ }
+ },
+ 5.023002 => {
+ delta_from => 5.023001,
+ changed => {
+ 'Attribute::Handlers' => '0.99',
+ 'B::Op_private' => '5.023002',
+ 'CPAN::Meta::YAML' => '0.017',
+ 'Config' => '5.023002',
+ 'Cwd' => '3.57',
+ 'Encode' => '2.76',
+ 'ExtUtils::ParseXS' => '3.29',
+ 'ExtUtils::ParseXS::Constants'=> '3.29',
+ 'ExtUtils::ParseXS::CountLines'=> '3.29',
+ 'ExtUtils::ParseXS::Eval'=> '3.29',
+ 'ExtUtils::ParseXS::Utilities'=> '3.29',
+ 'ExtUtils::Typemaps' => '3.29',
+ 'File::Find' => '1.30',
+ 'File::Spec' => '3.57',
+ 'File::Spec::Cygwin' => '3.57',
+ 'File::Spec::Epoc' => '3.57',
+ 'File::Spec::Functions' => '3.57',
+ 'File::Spec::Mac' => '3.57',
+ 'File::Spec::OS2' => '3.57',
+ 'File::Spec::Unix' => '3.57',
+ 'File::Spec::VMS' => '3.57',
+ 'File::Spec::Win32' => '3.57',
+ 'Filter::Util::Call' => '1.55',
+ 'Hash::Util' => '0.19',
+ 'Module::CoreList' => '5.20150820',
+ 'Module::CoreList::TieHashDelta'=> '5.20150820',
+ 'Module::CoreList::Utils'=> '5.20150820',
+ 'POSIX' => '1.56',
+ 'Term::Cap' => '1.17',
+ 'Unicode::UCD' => '0.62',
+ 'perlfaq' => '5.021010',
+ },
+ removed => {
+ }
+ },
+ 5.020003 => {
+ delta_from => 5.020002,
+ changed => {
+ 'Config' => '5.020003',
+ 'Errno' => '1.20_06',
+ 'Module::CoreList' => '5.20150912',
+ 'Module::CoreList::TieHashDelta'=> '5.20150912',
+ 'Module::CoreList::Utils'=> '5.20150912',
+ },
+ removed => {
+ }
+ },
+ 5.023003 => {
+ delta_from => 5.023002,
+ changed => {
+ 'Amiga::ARexx' => '0.02',
+ 'Amiga::Exec' => '0.01',
+ 'B' => '1.59',
+ 'B::Op_private' => '5.023003',
+ 'Carp' => '1.37',
+ 'Carp::Heavy' => '1.37',
+ 'Compress::Raw::Zlib' => '2.068_01',
+ 'Config' => '5.023003',
+ 'Cwd' => '3.58',
+ 'DynaLoader' => '1.34',
+ 'Encode' => '2.77',
+ 'Encode::Unicode' => '2.14',
+ 'English' => '1.10',
+ 'Errno' => '1.24',
+ 'ExtUtils::Command' => '7.10',
+ 'ExtUtils::Command::MM' => '7.10',
+ 'ExtUtils::Liblist' => '7.10',
+ 'ExtUtils::Liblist::Kid'=> '7.10',
+ 'ExtUtils::MM' => '7.10',
+ 'ExtUtils::MM_AIX' => '7.10',
+ 'ExtUtils::MM_Any' => '7.10',
+ 'ExtUtils::MM_BeOS' => '7.10',
+ 'ExtUtils::MM_Cygwin' => '7.10',
+ 'ExtUtils::MM_DOS' => '7.10',
+ 'ExtUtils::MM_Darwin' => '7.10',
+ 'ExtUtils::MM_MacOS' => '7.10',
+ 'ExtUtils::MM_NW5' => '7.10',
+ 'ExtUtils::MM_OS2' => '7.10',
+ 'ExtUtils::MM_QNX' => '7.10',
+ 'ExtUtils::MM_UWIN' => '7.10',
+ 'ExtUtils::MM_Unix' => '7.10',
+ 'ExtUtils::MM_VMS' => '7.10',
+ 'ExtUtils::MM_VOS' => '7.10',
+ 'ExtUtils::MM_Win32' => '7.10',
+ 'ExtUtils::MM_Win95' => '7.10',
+ 'ExtUtils::MY' => '7.10',
+ 'ExtUtils::MakeMaker' => '7.10',
+ 'ExtUtils::MakeMaker::Config'=> '7.10',
+ 'ExtUtils::MakeMaker::Locale'=> '7.10',
+ 'ExtUtils::MakeMaker::version'=> '7.10',
+ 'ExtUtils::MakeMaker::version::regex'=> '7.10',
+ 'ExtUtils::MakeMaker::version::vpp'=> '7.10',
+ 'ExtUtils::Mkbootstrap' => '7.10',
+ 'ExtUtils::Mksymlists' => '7.10',
+ 'ExtUtils::ParseXS' => '3.30',
+ 'ExtUtils::ParseXS::Constants'=> '3.30',
+ 'ExtUtils::ParseXS::CountLines'=> '3.30',
+ 'ExtUtils::ParseXS::Eval'=> '3.30',
+ 'ExtUtils::ParseXS::Utilities'=> '3.30',
+ 'ExtUtils::Typemaps' => '3.30',
+ 'ExtUtils::Typemaps::Cmd'=> '3.30',
+ 'ExtUtils::Typemaps::InputMap'=> '3.30',
+ 'ExtUtils::Typemaps::OutputMap'=> '3.30',
+ 'ExtUtils::Typemaps::Type'=> '3.30',
+ 'ExtUtils::testlib' => '7.10',
+ 'File::Find' => '1.31',
+ 'File::Glob' => '1.25',
+ 'File::Spec' => '3.58',
+ 'File::Spec::AmigaOS' => '3.58',
+ 'File::Spec::Cygwin' => '3.58',
+ 'File::Spec::Epoc' => '3.58',
+ 'File::Spec::Functions' => '3.58',
+ 'File::Spec::Mac' => '3.58',
+ 'File::Spec::OS2' => '3.58',
+ 'File::Spec::Unix' => '3.58',
+ 'File::Spec::VMS' => '3.58',
+ 'File::Spec::Win32' => '3.58',
+ 'Hash::Util::FieldHash' => '1.17',
+ 'Locale::Codes' => '3.36',
+ 'Locale::Codes::Constants'=> '3.36',
+ 'Locale::Codes::Country'=> '3.36',
+ 'Locale::Codes::Country_Codes'=> '3.36',
+ 'Locale::Codes::Country_Retired'=> '3.36',
+ 'Locale::Codes::Currency'=> '3.36',
+ 'Locale::Codes::Currency_Codes'=> '3.36',
+ 'Locale::Codes::Currency_Retired'=> '3.36',
+ 'Locale::Codes::LangExt'=> '3.36',
+ 'Locale::Codes::LangExt_Codes'=> '3.36',
+ 'Locale::Codes::LangExt_Retired'=> '3.36',
+ 'Locale::Codes::LangFam'=> '3.36',
+ 'Locale::Codes::LangFam_Codes'=> '3.36',
+ 'Locale::Codes::LangFam_Retired'=> '3.36',
+ 'Locale::Codes::LangVar'=> '3.36',
+ 'Locale::Codes::LangVar_Codes'=> '3.36',
+ 'Locale::Codes::LangVar_Retired'=> '3.36',
+ 'Locale::Codes::Language'=> '3.36',
+ 'Locale::Codes::Language_Codes'=> '3.36',
+ 'Locale::Codes::Language_Retired'=> '3.36',
+ 'Locale::Codes::Script' => '3.36',
+ 'Locale::Codes::Script_Codes'=> '3.36',
+ 'Locale::Codes::Script_Retired'=> '3.36',
+ 'Locale::Country' => '3.36',
+ 'Locale::Currency' => '3.36',
+ 'Locale::Language' => '3.36',
+ 'Locale::Script' => '3.36',
+ 'Math::BigFloat::Trace' => '0.40',
+ 'Math::BigInt::Trace' => '0.40',
+ 'Module::CoreList' => '5.20150920',
+ 'Module::CoreList::TieHashDelta'=> '5.20150920',
+ 'Module::CoreList::Utils'=> '5.20150920',
+ 'OS2::DLL' => '1.06',
+ 'OS2::ExtAttr' => '0.04',
+ 'OS2::Process' => '1.11',
+ 'OS2::REXX' => '1.05',
+ 'POSIX' => '1.57',
+ 'Pod::Perldoc' => '3.25_01',
+ 'Socket' => '2.020_01',
+ 'Test' => '1.27',
+ 'Thread::Queue' => '3.06',
+ 'Time::HiRes' => '1.9727_02',
+ 'Unicode::UCD' => '0.63',
+ 'Win32' => '0.52',
+ 'XS::APItest' => '0.75',
+ 'bigint' => '0.40',
+ 'bignum' => '0.40',
+ 'bigrat' => '0.40',
+ 'encoding' => '2.17',
+ 'experimental' => '0.014',
+ 'if' => '0.0605',
+ 'locale' => '1.07',
+ 'mro' => '1.18',
+ 'threads' => '2.03',
+ },
+ removed => {
+ }
+ },
+ 5.023004 => {
+ delta_from => 5.023003,
+ changed => {
+ 'B' => '1.60',
+ 'B::Op_private' => '5.023004',
+ 'Compress::Raw::Bzip2' => '2.069',
+ 'Compress::Raw::Zlib' => '2.069',
+ 'Compress::Zlib' => '2.069',
+ 'Config' => '5.023004',
+ 'Devel::PPPort' => '3.32',
+ 'DynaLoader' => '1.35',
+ 'Encode' => '2.78',
+ 'ExtUtils::CBuilder' => '0.280224',
+ 'ExtUtils::CBuilder::Base'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::Unix'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::VMS'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::Windows'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::Windows::BCC'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::Windows::GCC'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::Windows::MSVC'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::aix'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::android'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::cygwin'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::darwin'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::dec_osf'=> '0.280224',
+ 'ExtUtils::CBuilder::Platform::os2'=> '0.280224',
+ 'File::Path' => '2.12',
+ 'IO' => '1.36',
+ 'IO::Compress::Adapter::Bzip2'=> '2.069',
+ 'IO::Compress::Adapter::Deflate'=> '2.069',
+ 'IO::Compress::Adapter::Identity'=> '2.069',
+ 'IO::Compress::Base' => '2.069',
+ 'IO::Compress::Base::Common'=> '2.069',
+ 'IO::Compress::Bzip2' => '2.069',
+ 'IO::Compress::Deflate' => '2.069',
+ 'IO::Compress::Gzip' => '2.069',
+ 'IO::Compress::Gzip::Constants'=> '2.069',
+ 'IO::Compress::RawDeflate'=> '2.069',
+ 'IO::Compress::Zip' => '2.069',
+ 'IO::Compress::Zip::Constants'=> '2.069',
+ 'IO::Compress::Zlib::Constants'=> '2.069',
+ 'IO::Compress::Zlib::Extra'=> '2.069',
+ 'IO::Poll' => '0.10',
+ 'IO::Uncompress::Adapter::Bunzip2'=> '2.069',
+ 'IO::Uncompress::Adapter::Identity'=> '2.069',
+ 'IO::Uncompress::Adapter::Inflate'=> '2.069',
+ 'IO::Uncompress::AnyInflate'=> '2.069',
+ 'IO::Uncompress::AnyUncompress'=> '2.069',
+ 'IO::Uncompress::Base' => '2.069',
+ 'IO::Uncompress::Bunzip2'=> '2.069',
+ 'IO::Uncompress::Gunzip'=> '2.069',
+ 'IO::Uncompress::Inflate'=> '2.069',
+ 'IO::Uncompress::RawInflate'=> '2.069',
+ 'IO::Uncompress::Unzip' => '2.069',
+ 'Math::BigFloat' => '1.999704',
+ 'Math::BigFloat::Trace' => '0.41',
+ 'Math::BigInt' => '1.999704',
+ 'Math::BigInt::Calc' => '1.999704',
+ 'Math::BigInt::CalcEmu' => '1.999704',
+ 'Math::BigInt::FastCalc'=> '0.34',
+ 'Math::BigInt::Trace' => '0.41',
+ 'Module::CoreList' => '5.20151020',
+ 'Module::CoreList::TieHashDelta'=> '5.20151020',
+ 'Module::CoreList::Utils'=> '5.20151020',
+ 'Module::Metadata' => '1.000029',
+ 'POSIX' => '1.58',
+ 'Perl::OSType' => '1.009',
+ 'PerlIO::encoding' => '0.22',
+ 'Socket' => '2.020_02',
+ 'Unicode::Normalize' => '1.21',
+ 'XS::APItest' => '0.76',
+ 'bigint' => '0.41',
+ 'bignum' => '0.41',
+ 'bigrat' => '0.41',
+ 'experimental' => '0.016',
+ 'if' => '0.0606',
+ 'warnings' => '1.35',
+ },
+ removed => {
+ }
+ },
+ 5.023005 => {
+ delta_from => 5.023004,
+ changed => {
+ 'B' => '1.61',
+ 'B::Op_private' => '5.023005',
+ 'Carp' => '1.38',
+ 'Carp::Heavy' => '1.38',
+ 'Config' => '5.023005',
+ 'Config::Perl::V' => '0.25',
+ 'Cwd' => '3.59',
+ 'Devel::Peek' => '1.23',
+ 'Dumpvalue' => '1.18',
+ 'DynaLoader' => '1.36',
+ 'File::Find' => '1.32',
+ 'File::Spec' => '3.59',
+ 'File::Spec::AmigaOS' => '3.59',
+ 'File::Spec::Cygwin' => '3.59',
+ 'File::Spec::Epoc' => '3.59',
+ 'File::Spec::Functions' => '3.59',
+ 'File::Spec::Mac' => '3.59',
+ 'File::Spec::OS2' => '3.59',
+ 'File::Spec::Unix' => '3.59',
+ 'File::Spec::VMS' => '3.59',
+ 'File::Spec::Win32' => '3.59',
+ 'Getopt::Long' => '2.48',
+ 'Hash::Util::FieldHash' => '1.18',
+ 'IPC::Open3' => '1.20',
+ 'Math::BigFloat' => '1.999710',
+ 'Math::BigInt' => '1.999710',
+ 'Math::BigInt::Calc' => '1.999710',
+ 'Math::BigInt::CalcEmu' => '1.999710',
+ 'Math::BigInt::FastCalc'=> '0.37',
+ 'Module::CoreList' => '5.20151120',
+ 'Module::CoreList::TieHashDelta'=> '5.20151120',
+ 'Module::CoreList::Utils'=> '5.20151120',
+ 'Module::Metadata' => '1.000030',
+ 'POSIX' => '1.59',
+ 'PerlIO::encoding' => '0.23',
+ 'PerlIO::mmap' => '0.015',
+ 'PerlIO::scalar' => '0.24',
+ 'PerlIO::via' => '0.16',
+ 'Pod::Simple' => '3.32',
+ 'Pod::Simple::BlackBox' => '3.32',
+ 'Pod::Simple::Checker' => '3.32',
+ 'Pod::Simple::Debug' => '3.32',
+ 'Pod::Simple::DumpAsText'=> '3.32',
+ 'Pod::Simple::DumpAsXML'=> '3.32',
+ 'Pod::Simple::HTML' => '3.32',
+ 'Pod::Simple::HTMLBatch'=> '3.32',
+ 'Pod::Simple::LinkSection'=> '3.32',
+ 'Pod::Simple::Methody' => '3.32',
+ 'Pod::Simple::Progress' => '3.32',
+ 'Pod::Simple::PullParser'=> '3.32',
+ 'Pod::Simple::PullParserEndToken'=> '3.32',
+ 'Pod::Simple::PullParserStartToken'=> '3.32',
+ 'Pod::Simple::PullParserTextToken'=> '3.32',
+ 'Pod::Simple::PullParserToken'=> '3.32',
+ 'Pod::Simple::RTF' => '3.32',
+ 'Pod::Simple::Search' => '3.32',
+ 'Pod::Simple::SimpleTree'=> '3.32',
+ 'Pod::Simple::Text' => '3.32',
+ 'Pod::Simple::TextContent'=> '3.32',
+ 'Pod::Simple::TiedOutFH'=> '3.32',
+ 'Pod::Simple::Transcode'=> '3.32',
+ 'Pod::Simple::TranscodeDumb'=> '3.32',
+ 'Pod::Simple::TranscodeSmart'=> '3.32',
+ 'Pod::Simple::XHTML' => '3.32',
+ 'Pod::Simple::XMLOutStream'=> '3.32',
+ 'Thread::Queue' => '3.07',
+ 'Tie::Scalar' => '1.04',
+ 'Time::HiRes' => '1.9728',
+ 'Time::Piece' => '1.31',
+ 'Time::Seconds' => '1.31',
+ 'Unicode::Normalize' => '1.23',
+ 'XSLoader' => '0.21',
+ 'arybase' => '0.11',
+ 'base' => '2.22_01',
+ 'fields' => '2.22_01',
+ 'threads' => '2.04',
+ 'threads::shared' => '1.49',
+ },
+ removed => {
+ 'ExtUtils::MakeMaker::version::vpp'=> 1,
+ 'version::vpp' => 1,
+ }
+ },
+ 5.022001 => {
+ delta_from => 5.022,
+ changed => {
+ 'B::Op_private' => '5.022001',
+ 'Config' => '5.022001',
+ 'Module::CoreList' => '5.20151213',
+ 'Module::CoreList::TieHashDelta'=> '5.20151213',
+ 'Module::CoreList::Utils'=> '5.20151213',
+ 'POSIX' => '1.53_01',
+ 'PerlIO::scalar' => '0.23',
+ 'Storable' => '2.53_01',
+ 'Win32' => '0.52',
+ 'warnings' => '1.34',
+ },
+ removed => {
+ }
+ },
);
sub is_core
removed => {
}
},
+ 5.023000 => {
+ delta_from => 5.022000,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023001 => {
+ delta_from => 5.023000,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023002 => {
+ delta_from => 5.023001,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.020003 => {
+ delta_from => 5.020002,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023003 => {
+ delta_from => 5.023002,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023004 => {
+ delta_from => 5.023003,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023005 => {
+ delta_from => 5.023004,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.022001 => {
+ delta_from => 5.022,
+ changed => {
+ },
+ removed => {
+ }
+ },
);
for my $version (sort { $a <=> $b } keys %deprecated) {
'Encode::TW' => undef,
'Encode::Unicode' => undef,
'Encode::Unicode::UTF7' => undef,
- 'ExtUtils::Command' => 'http://rt.perl.org/rt3/',
+ 'ExtUtils::Command' => 'http://rt.cpan.org/NoAuth/Bugs.html?Dist=ExtUtils-MakeMaker',
'ExtUtils::Command::MM' => 'http://rt.cpan.org/NoAuth/Bugs.html?Dist=ExtUtils-MakeMaker',
'ExtUtils::Constant' => undef,
'ExtUtils::Constant::Base'=> undef,
'Net::SMTP' => undef,
'Net::Time' => undef,
'Params::Check' => undef,
- 'Parse::CPAN::Meta' => 'http://rt.cpan.org/Public/Dist/Display.html?Name=Parse-CPAN-Meta',
- 'Perl::OSType' => 'https://github.com/dagolden/Perl-OSType/issues',
+ 'Parse::CPAN::Meta' => 'https://github.com/Perl-Toolchain-Gang/Parse-CPAN-Meta/issues',
+ 'Perl::OSType' => 'https://github.com/Perl-Toolchain-Gang/Perl-OSType/issues',
'PerlIO::via::QuotedPrint'=> undef,
'Pod::Checker' => undef,
'Pod::Escapes' => undef,
'Pod::Perldoc::ToXml' => undef,
'Pod::PlainText' => undef,
'Pod::Select' => undef,
- 'Pod::Simple' => undef,
- 'Pod::Simple::BlackBox' => undef,
- 'Pod::Simple::Checker' => undef,
- 'Pod::Simple::Debug' => undef,
- 'Pod::Simple::DumpAsText'=> undef,
- 'Pod::Simple::DumpAsXML'=> undef,
- 'Pod::Simple::HTML' => undef,
- 'Pod::Simple::HTMLBatch'=> undef,
- 'Pod::Simple::HTMLLegacy'=> undef,
- 'Pod::Simple::LinkSection'=> undef,
- 'Pod::Simple::Methody' => undef,
- 'Pod::Simple::Progress' => undef,
- 'Pod::Simple::PullParser'=> undef,
- 'Pod::Simple::PullParserEndToken'=> undef,
- 'Pod::Simple::PullParserStartToken'=> undef,
- 'Pod::Simple::PullParserTextToken'=> undef,
- 'Pod::Simple::PullParserToken'=> undef,
- 'Pod::Simple::RTF' => undef,
- 'Pod::Simple::Search' => undef,
- 'Pod::Simple::SimpleTree'=> undef,
- 'Pod::Simple::Text' => undef,
- 'Pod::Simple::TextContent'=> undef,
- 'Pod::Simple::TiedOutFH'=> undef,
- 'Pod::Simple::Transcode'=> undef,
- 'Pod::Simple::TranscodeDumb'=> undef,
- 'Pod::Simple::TranscodeSmart'=> undef,
- 'Pod::Simple::XHTML' => undef,
- 'Pod::Simple::XMLOutStream'=> undef,
+ 'Pod::Simple' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::BlackBox' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Checker' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Debug' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::DumpAsText'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::DumpAsXML'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::HTML' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::HTMLBatch'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::HTMLLegacy'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::LinkSection'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Methody' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Progress' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::PullParser'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::PullParserEndToken'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::PullParserStartToken'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::PullParserTextToken'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::PullParserToken'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::RTF' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Search' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::SimpleTree'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Text' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::TextContent'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::TiedOutFH'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::Transcode'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::TranscodeDumb'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::TranscodeSmart'=> 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::XHTML' => 'https://github.com/perl-pod/pod-simple/issues',
+ 'Pod::Simple::XMLOutStream'=> 'https://github.com/perl-pod/pod-simple/issues',
'Pod::Text' => undef,
'Pod::Text::Color' => undef,
'Pod::Text::Overstrike' => undef,
'Unicode::Collate::CJK::Stroke'=> undef,
'Unicode::Collate::CJK::Zhuyin'=> undef,
'Unicode::Collate::Locale'=> undef,
- 'Unicode::Normalize' => undef,
+ 'Unicode::Normalize' => 'https://rt.cpan.org/Public/Dist/Display.html?Name=Unicode-Normalize',
'Win32' => undef,
'Win32API::File' => undef,
'Win32API::File::ExtUtils::Myconst2perl'=> undef,
=item C<find_version( PERL_VERSION )>
-Takes a perl version as an argument. Returns that perl version if it exists or C<undef>
-otherwise.
+Takes a perl version as an argument. Upon successful completion, returns a
+reference to a hash. Each element of that hash has a key which is the name of
+a module (I<e.g.,> 'File::Path') shipped with that version of perl and a value
+which is the version number (I<e.g.,> '2.09') of that module which shipped
+with that version of perl . Returns C<undef> otherwise.
=item C<is_core( MODULE, [ MODULE_VERSION, [ PERL_VERSION ] ] )>
Available in version 2.77 and above.
-Returns the first PERL_VERSION where the MODULE was marked as deprecated. Returns C<undef>
+Returns the first perl version where the MODULE was marked as deprecated. Returns C<undef>
if the MODULE has not been marked as deprecated.
=item C<removed_from( MODULE )>
use strict;
use vars qw($VERSION);
-$VERSION = '5.20150520';
+$VERSION = '5.20151213';
sub TIEHASH {
my ($class, $changed, $removed, $parent) = @_;
use Module::CoreList;
use Module::CoreList::TieHashDelta;
-$VERSION = '5.20150520';
+$VERSION = '5.20151213';
sub utilities {
my $perl = shift;
removed => {
}
},
+ 5.023000 => {
+ delta_from => 5.022000,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023001 => {
+ delta_from => 5.023,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023002 => {
+ delta_from => 5.023001,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.020003 => {
+ delta_from => 5.020002,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023003 => {
+ delta_from => 5.023002,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023004 => {
+ delta_from => 5.023003,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.023005 => {
+ delta_from => 5.023004,
+ changed => {
+ },
+ removed => {
+ }
+ },
+ 5.022001 => {
+ delta_from => 5.022,
+ changed => {
+ },
+ removed => {
+ }
+ },
);
for my $version (sort { $a <=> $b } keys %delta) {
#!perl -w
use strict;
use Module::CoreList;
-use Test::More tests => 29;
+use Test::More tests => 32;
BEGIN { require_ok('Module::CoreList'); }
cmp_ok($warnings_count, '==', 0,
"an undefined version does not produce warnings rt#123556");
}
+
+ok(! defined(Module::CoreList->find_version()),
+ "Lacking an argument, Module::CoreList->find_version() returns undef");
+my $v = 5.022;
+is(ref(Module::CoreList->find_version($v)), 'HASH',
+ "With argument, Module::CoreList->find_version() returns hashref");
+$v = 5.022000;
+is(ref(Module::CoreList->find_version($v)), 'HASH',
+ "With argument, Module::CoreList->find_version() returns hashref");
use vars qw($canonical $forgive_me $VERSION);
-$VERSION = '2.53';
+$VERSION = '2.53_01';
BEGIN {
if (eval { local $SIG{__DIE__}; require Log::Agent; 1 }) {
ALIAS:
net_mstore = 1
CODE:
+ RETVAL = &PL_sv_undef;
if (!do_store(aTHX_ (PerlIO*) 0, obj, 0, ix, &RETVAL))
RETVAL = &PL_sv_undef;
OUTPUT:
our ($AUTOLOAD, %SIGRT);
-our $VERSION = '1.53';
+our $VERSION = '1.53_01';
require XSLoader;
exit => 'status => CORE::exit($_[0])',
getenv => 'name => $ENV{$_[0]}',
system => 'command => CORE::system($_[0])',
- strerror => 'errno => BEGIN { local $!; require locale; locale->import} local $! = $_[0]; "$!"',
+ strerror => 'errno => BEGIN { local $!; require locale; locale->import} my $e = $_[0] + 0; local $!; $! = $e; "$!"',
strstr => 'big, little => CORE::index($_[0], $_[1])',
chmod => 'mode, filename => CORE::chmod($_[0], $_[1])',
fstat => 'fd => CORE::open my $dup, "<&", $_[0]; CORE::stat($dup)', # Gross.
=item C<fesetround>
-Sets the floating point rounding mode, see L</fegetround>.
+Sets the floating point rounding mode, see L</fegetround> [C99].
=item C<fma>
FP_NORMAL FP_ZERO FP_SUBNORMAL FP_INFINITE FP_NAN
-telling the class of the argument [C99].
+telling the class of the argument [C99]. C<FP_INFINITE> is positive
+or negative infinity, C<FP_NAN> is not-a-number. C<FP_SUBNORMAL>
+means subnormal numbers (also known as denormals), very small numbers
+with low precision. C<FP_ZERO> is zero. C<FP_NORMAL> is all the rest.
=item C<fprintf>
See also L</logb>.
+=item C<Inf>
+
+The infinity as a constant:
+
+ use POSIX qw(Inf);
+ my $pos_inf = +Inf; # Or just Inf.
+ my $neg_inf = -Inf;
+
+See also L</isinf>, and L</fpclassify>.
+
=item C<isalnum>
Deprecated function whose use raises a warning, and which is slated to
Returns true if the argument is an infinity (positive or negative) [C99].
-See also L</isnan>, L</isfinite>, and L</fpclassify>.
+See also L</Inf>, L</isnan>, L</isfinite>, and L</fpclassify>.
=item C<islower>
since the C<NaN> is not equivalent to anything, B<including itself>.
-See also L</nan>, L</isinf>, and L</fpclassify>.
+See also L</nan>, L</NaN>, L</isinf>, and L</fpclassify>.
=item C<isnormal>
See also L</round>.
+=item C<NaN>
+
+The not-a-number as a constant:
+
+ use POSIX qw(NaN);
+ my $nan = NaN;
+
+See also L</nan>, C</isnan>, and L</fpclassify>.
+
=item C<nan>
Returns not-a-number [C99].
-See also L</isnan>.
+See also L</isnan> and L</NaN>.
=item C<nearbyint>
POSIX::strerror(1);
is (0+$!, 1, 'strerror doesn\'t destroy $!');
+# [perl #126229] POSIX::strerror() clears $!
+{
+ local $! = 29;
+ my $e = POSIX::strerror($!);
+ is (0+$!, 29);
+}
+
done_testing();
package PerlIO::scalar;
-our $VERSION = '0.22';
+our $VERSION = '0.23';
require XSLoader;
XSLoader::load();
1;
/* ensure we don't try to create ridiculously large
* SVs on small platforms
*/
-#if SSize_t_size < Off_t_size
+#if Size_t_size < Off_t_size
if (s->posn > SSize_t_MAX) {
#ifdef EFBIG
SETERRNO(EFBIG, SS_BUFFEROVF);
tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV);
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
- if (!tmpgv)
+ if (!tmpgv || !isGV_with_GP(tmpgv))
return NULL;
stash = GvHV(tmpgv);
if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL;
# mkdir -p /opt/perl-catamount
# mkdir -p /opt/perl-catamount/include
# mkdir -p /opt/perl-catamount/lib
-# mkdir -p /opt/perl-catamount/lib/perl5/5.22.0
+# mkdir -p /opt/perl-catamount/lib/perl5/5.22.1
# mkdir -p /opt/perl-catamount/bin
# cp *.h /opt/perl-catamount/include
# cp libperl.a /opt/perl-catamount/lib
-# cp -pr lib/* /opt/perl-catamount/lib/perl5/5.22.0
+# cp -pr lib/* /opt/perl-catamount/lib/perl5/5.22.1
# cp miniperl perl run.sh cc.sh /opt/perl-catamount/lib
#
# With the headers and the libperl.a you can embed Perl to your Catamount
# instead; in IRIX this is not true because the prototype of fcntl()
# requires explicit include of <fcntl.h>
i_fcntl=define
+
+# There is <prctl.h> but it's not the Linux one that Configure expects.
+d_prctl="$undef"
Frees the all the elements of a hash, leaving it empty.
The XS equivalent of C<%hash = ()>. See also L</hv_undef>.
-If any destructors are triggered as a result, the hv itself may
-be freed.
+See L</av_clear> for a note about the hash possibly being invalid on
+return.
=cut
*/
As well as freeing all the elements of the hash (like hv_clear()), this
also frees any auxiliary data and storage associated with the hash.
-If any destructors are triggered as a result, the hv itself may
-be freed.
-
-See also L</hv_clear>.
+See L</av_clear> for a note about the hash possibly being invalid on
+return.
=cut
*/
# if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
# define PERL_HASH_SEED PL_hash_seed
# elif PERL_HASH_SEED_BYTES == 4
-# define PERL_HASH_SEED "PeRl"
+# define PERL_HASH_SEED ((const U8 *)"PeRl")
+# elif PERL_HASH_SEED_BYTES == 8
+# define PERL_HASH_SEED ((const U8 *)"PeRlHaSh")
# elif PERL_HASH_SEED_BYTES == 16
-# define PERL_HASH_SEED "PeRlHaShhAcKpErl"
+# define PERL_HASH_SEED ((const U8 *)"PeRlHaShhAcKpErl")
# else
# error "No PERL_HASH_SEED definition for " PERL_HASH_FUNC
# endif
* are only needed to help derive these 3.
*
* U8TO32_LE(x) Read a little endian unsigned 32-bit int
- * UNALIGNED_SAFE Defined if READ_UINT32 works on non-word boundaries
+ * UNALIGNED_SAFE Defined if unaligned access is safe
* ROTL32(x,r) Rotate x left by r bits
*/
+((const U8 *)(d))[0])
#endif
-
-/* Now find best way we can to READ_UINT32 */
#if (BYTEORDER == 0x1234 || BYTEORDER == 0x12345678) && U32SIZE == 4
/* CPU endian matches murmurhash algorithm, so read 32-bit word directly */
#define U8TO32_LE(ptr) (*((U32*)(ptr)))
return a 32 bit hash.
Note uses unaligned 64 bit loads - will NOT work on machines with
- strict alginment requirements.
+ strict alignment requirements.
Also this code may not be suitable for big-endian machines.
*/
a 32 bit value
Note uses unaligned 32 bit loads - will NOT work on machines with
- strict alginment requirements.
+ strict alignment requirements.
Also this code may not be suitable for big-endian machines.
*/
PERLVARI(I, statname, SV *, NULL)
#ifdef HAS_TIMES
-/* Will be removed soon after v5.22.0. See RT #121351 */
+/* Will be removed soon after v5.22.1. See RT #121351 */
PERLVAR(I, timesbuf, struct tms)
#endif
PERLVARI(I, padlist_generation, U32, 1) /* id to identify padlist clones */
-/* The last unconditional member of the interpreter structure when 5.22.0 was
+/* The last unconditional member of the interpreter structure when 5.22.1 was
released. The offset of the end of this is baked into a global variable in
any shared perl library which will allow a sanity test in future perl
releases. */
our %bits;
-our $VERSION = "5.022000";
+our $VERSION = "5.022001";
$bits{$_}{3} = 'OPpENTERSUB_AMPER' for qw(entersub rv2cv);
$bits{$_}{6} = 'OPpENTERSUB_DB' for qw(entersub rv2cv);
package warnings;
-our $VERSION = '1.32';
+our $VERSION = "1.34";
# Verify that we're called correctly so that warnings will work.
# see also strict.pm.
package MyMod::Abc;
sub open {
- warnings::warnif("deprecated",
- "open is deprecated, use new instead");
+ if (warnings::enabled("deprecated")) {
+ warnings::warn("deprecated",
+ "open is deprecated, use new instead");
+ }
new(@_);
}
int
Perl_signbit(NV x) {
# ifdef Perl_fp_class_nzero
- if (x == 0)
- return Perl_fp_class_nzero(x);
-# endif
+ return Perl_fp_class_nzero(x);
+ /* Try finding the high byte, and assume it's highest bit
+ * is the sign. This assumption is probably wrong somewhere. */
+# elif defined(USE_LONG_DOUBLE) && LONG_DOUBLEKIND == LONG_DOUBLE_IS_X86_80_BIT_LITTLE_ENDIAN
+ return (((unsigned char *)&x)[9] & 0x80);
+# elif defined(NV_LITTLE_ENDIAN)
+ /* Note that NVSIZE is sizeof(NV), which would make the below be
+ * wrong if the end bytes are unused, which happens with the x86
+ * 80-bit long doubles, which is why take care of that above. */
+ return (((unsigned char *)&x)[NVSIZE - 1] & 0x80);
+# elif defined(NV_BIG_ENDIAN)
+ return (((unsigned char *)&x)[0] & 0x80);
+# else
+ /* This last resort fallback is wrong for the negative zero. */
return (x < 0.0) ? 1 : 0;
+# endif
}
#endif
#define PERL_REVISION 5 /* age */
#define PERL_VERSION 22 /* epoch */
-#define PERL_SUBVERSION 0 /* generation */
+#define PERL_SUBVERSION 1 /* generation */
/* The following numbers describe the earliest compatible version of
Perl ("compatibility" here being defined as sufficient binary/API
const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
if (s && strEQ(s, "1")) {
- unsigned char *seed= PERL_HASH_SEED;
- unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
+ const unsigned char *seed= PERL_HASH_SEED;
+ const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
while (seed < seed_end) {
PerlIO_printf(Perl_debug_log, "%02x", *seed++);
/*
=for apidoc p||call_sv
-Performs a callback to the Perl sub whose name is in the SV. See
-L<perlcall>.
+Performs a callback to the Perl sub specified by the SV.
+
+If neither the C<G_METHOD> or C<G_METHOD_NAMED> flag is supplied, the
+SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
+or C<SvPV(sv)> will be used as the name of the sub to call.
+
+If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
+C<SvPV(sv)> will be used as the name of the method to call.
+
+If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
+the name of the method to call.
+
+Some other values are treated specially for internal use and should
+not be depended on.
+
+See L<perlcall>.
=cut
*/
/* Also Tru64 cc has broken NaN comparisons. */
# define NAN_COMPARE_BROKEN
#endif
+#if defined(__sgi)
+# define NAN_COMPARE_BROKEN
+#endif
#ifdef USE_LONG_DOUBLE
# ifdef I_SUNMATH
#if !defined(NV_NAN) && defined(QNAN)
# define NV_NAN (NV)QNAN
#endif
-#if !defined(NV_NAN) && defined(I_SUNMATH)
+#if !defined(NV_NAN) && defined(USE_LONG_DOUBLE) && defined(I_SUNMATH)
# define NV_NAN (NV)quiet_nan()
#endif
#if !defined(NV_NAN)
return -1;
SETERRNO(0,0); /* just in case */
}
+#ifdef __sgi
+ /* Under some circumstances IRIX stdio fgetc() and fread()
+ * set the errno to ENOENT, which makes no sense according
+ * to either IRIX or POSIX. [rt.perl.org #123977] */
+ if (errno == ENOENT) SETERRNO(0,0);
+#endif
return got;
}
if (yy_type_tab[yystos[ps->state]] == toketype_opval
&& ps->val.opval)
{
- if (ps->compcv != PL_compcv) {
+ if (ps->compcv && (ps->compcv != PL_compcv)) {
PL_compcv = ps->compcv;
PAD_SET_CUR_NOSAVE(CvPADLIST(PL_compcv), 1);
PL_comppad_name = PadlistNAMES(CvPADLIST(PL_compcv));
* This symbol contains the ~name expanded version of PRIVLIB, to be used
* in programs that are not prepared to deal with ~ expansion at run-time.
*/
-#define PRIVLIB "/sys/lib/perl/5.22.0" /**/
-#define PRIVLIB_EXP "/sys/lib/perl/5.22.0" /**/
+#define PRIVLIB "/sys/lib/perl/5.22.1" /**/
+#define PRIVLIB_EXP "/sys/lib/perl/5.22.1" /**/
/* PTRSIZE:
* This symbol contains the size of a pointer, so that the C preprocessor
* removed. The elements in inc_version_list (inc_version_list.U) can
* be tacked onto this variable to generate a list of directories to search.
*/
-#define SITELIB "/sys/lib/perl/5.22.0/site_perl" /**/
-#define SITELIB_EXP "/sys/lib/perl/5.22.0/site_perl" /**/
-#define SITELIB_STEM "/sys/lib/perl/5.22.0/site_perl" /**/
+#define SITELIB "/sys/lib/perl/5.22.1/site_perl" /**/
+#define SITELIB_EXP "/sys/lib/perl/5.22.1/site_perl" /**/
+#define SITELIB_STEM "/sys/lib/perl/5.22.1/site_perl" /**/
/* Size_t_size:
* This symbol holds the size of a Size_t in bytes.
api_version='22'
api_versionstring='5.22.0'
ar='ar'
-archlib='/sys/lib/perl5/5.22.0/386'
-archlibexp='/sys/lib/perl5/5.22.0/386'
+archlib='/sys/lib/perl5/5.22.1/386'
+archlibexp='/sys/lib/perl5/5.22.1/386'
archname64=''
archname='386'
archobjs=''
inc_version_list_init='0'
incpath=''
inews=''
-installarchlib='/sys/lib/perl/5.22.0/386'
+installarchlib='/sys/lib/perl/5.22.1/386'
installbin='/usr/bin'
installman1dir='/sys/man/1pub'
installman3dir='/sys/man/2pub'
installprefix='/usr'
installprefixexp='/usr'
-installprivlib='/sys/lib/perl/5.22.0'
+installprivlib='/sys/lib/perl/5.22.1'
installscript='/usr/bin'
-installsitearch='/sys/lib/perl/5.22.0/site_perl/386'
+installsitearch='/sys/lib/perl/5.22.1/site_perl/386'
installsitebin='/usr/bin'
-installsitelib='/sys/lib/perl/5.22.0/site_perl'
+installsitelib='/sys/lib/perl/5.22.1/site_perl'
installstyle='lib/perl5'
installusrbinperl='undef'
installvendorarch=''
pr=''
prefix='/usr'
prefixexp='/usr'
-privlib='/sys/lib/perl/5.22.0'
-privlibexp='/sys/lib/perl/5.22.0'
+privlib='/sys/lib/perl/5.22.1'
+privlibexp='/sys/lib/perl/5.22.1'
procselfexe=''
prototype='define'
ptrsize='4'
sig_num_init='0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 0'
sig_size='50'
signal_t='void'
-sitearch='/sys/lib/perl/5.22.0/site_perl/386'
+sitearch='/sys/lib/perl/5.22.1/site_perl/386'
sitearchexp='/sys/lib/perl/site_perl/386'
sitebin='/usr/bin'
sitebinexp='/usr/bin'
-sitelib='/sys/lib/perl/5.22.0/site_perl'
-sitelib_stem='/sys/lib/perl/5.22.0/site_perl'
-sitelibexp='/sys/lib/perl/5.22.0/site_perl'
+sitelib='/sys/lib/perl/5.22.1/site_perl'
+sitelib_stem='/sys/lib/perl/5.22.1/site_perl'
+sitelibexp='/sys/lib/perl/5.22.1/site_perl'
siteprefix='/usr'
siteprefixexp='/usr'
sizesize='4'
strerror_r_proto='0'
strings='/sys/include/ape/string.h'
submit=''
-subversion='0'
+subversion='1'
sysman='/sys/man/1pub'
tail=''
tar=''
vendorlibexp=''
vendorprefix=''
vendorprefixexp=''
-version='5.22.0'
-version_patchlevel_string='version 22 subversion 0'
+version='5.22.1'
+version_patchlevel_string='version 22 subversion 1'
versiononly='undef'
vi=''
xlibpth=''
config_argc=0
PERL_REVISION=5
PERL_VERSION=22
-PERL_SUBVERSION=0
+PERL_SUBVERSION=1
PERL_API_REVISION=5
PERL_API_VERSION=22
PERL_API_SUBVERSION=0
/roffitall
# generated
-/perl5220delta.pod
+/perl5221delta.pod
/perlapi.pod
/perlintern.pod
*.html
perlhist Perl history records
perldelta Perl changes since previous version
- perl52111delta Perl changes in version 5.21.11
- perl52110delta Perl changes in version 5.21.10
- perl5219delta Perl changes in version 5.21.9
- perl5218delta Perl changes in version 5.21.8
- perl5217delta Perl changes in version 5.21.7
- perl5216delta Perl changes in version 5.21.6
- perl5215delta Perl changes in version 5.21.5
- perl5214delta Perl changes in version 5.21.4
- perl5213delta Perl changes in version 5.21.3
- perl5212delta Perl changes in version 5.21.2
- perl5211delta Perl changes in version 5.21.1
- perl5210delta Perl changes in version 5.21.0
+ perl5221delta Perl changes in version 5.22.1
+ perl5220delta Perl changes in version 5.22.0
+ perl5203delta Perl changes in version 5.20.3
perl5202delta Perl changes in version 5.20.2
perl5201delta Perl changes in version 5.20.1
perl5200delta Perl changes in version 5.20.0
L<English> has been upgraded from version 1.06 to 1.09.
+C<$OLD_PERL_VERSION> was added as an alias of C<$]>.
+
=item *
L<Errno> has been upgraded from version 1.18 to 1.20_03.
actually exist have been removed from the documentation. These were
C<$OLD_PERL_VERSION>, C<$OFMT>, and C<$ARRAY_BASE>.
+(Actually, C<OLD_PERL_VERSION> I<does> exist, starting with this revision, but
+remained undocumented until perl 5.22.0.)
+
=back
=head3 L<perlxs>
--- /dev/null
+=encoding utf8
+
+=head1 NAME
+
+perl5203delta - what is new for perl v5.20.3
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.20.2 release and the 5.20.3
+release.
+
+If you are upgrading from an earlier release such as 5.20.1, first read
+L<perl5202delta>, which describes differences between 5.20.1 and 5.20.2.
+
+=head1 Incompatible Changes
+
+There are no changes intentionally incompatible with 5.20.2. If any exist,
+they are bugs, and we request that you submit a report. See L</Reporting Bugs>
+below.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<Errno> has been upgraded from version 1.20_05 to 1.20_06.
+
+Add B<-P> to the pre-processor command-line on GCC 5. GCC added extra line
+directives, breaking parsing of error code definitions.
+L<[perl #123784]|https://rt.perl.org/Ticket/Display.html?id=123784>
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20150214 to 5.20150822.
+
+Updated to cover the latest releases of Perl.
+
+=item *
+
+L<perl5db.pl> has been upgraded from 1.44 to 1.44_01.
+
+The debugger would cause an assertion failure.
+L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
+
+=back
+
+=head1 Documentation
+
+=head2 Changes to Existing Documentation
+
+=head3 L<perlfunc>
+
+=over 4
+
+=item *
+
+Mention that L<C<study()>|perlfunc/study> is currently a no-op.
+
+=back
+
+=head3 L<perlguts>
+
+=over 4
+
+=item *
+
+The OOK example has been updated to account for COW changes and a change in the
+storage of the offset.
+
+=back
+
+=head3 L<perlhacktips>
+
+=over 4
+
+=item *
+
+Documentation has been added illustrating the perils of assuming the contents
+of static memory pointed to by the return values of Perl wrappers for C library
+functions doesn't change.
+
+=back
+
+=head3 L<perlpodspec>
+
+=over 4
+
+=item *
+
+The specification of the POD language is changing so that the default encoding
+of PODs that aren't in UTF-8 (unless otherwise indicated) is CP1252 instead of
+ISO-8859-1 (Latin1).
+
+=back
+
+=head1 Utility Changes
+
+=head2 L<h2ph>
+
+=over 4
+
+=item *
+
+B<h2ph> now handles hexadecimal constants in the compiler's predefined macro
+definitions, as visible in C<$Config{cppsymbols}>.
+L<[perl #123784]|https://rt.perl.org/Ticket/Display.html?id=123784>
+
+=back
+
+=head1 Testing
+
+=over 4
+
+=item *
+
+F<t/perf/taint.t> has been added to see if optimisations with taint issues are
+keeping things fast.
+
+=item *
+
+F<t/porting/re_context.t> has been added to test that L<utf8> and its
+dependencies only use the subset of the C<$1..$n> capture vars that
+Perl_save_re_context() is hard-coded to localize, because that function has no
+efficient way of determining at runtime what vars to localize.
+
+=back
+
+=head1 Platform Support
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item Win32
+
+=over 4
+
+=item *
+
+Previously, when compiling with a 64-bit Visual C++, every Perl XS module
+(including CPAN ones) and Perl aware C file would unconditionally have around a
+dozen warnings from F<hv_func.h>. These warnings have been silenced. GCC (all
+bitness) and 32-bit Visual C++ were not affected.
+
+=item *
+
+B<miniperl.exe> is now built with B<-fno-strict-aliasing>, allowing 64-bit
+builds to complete with GCC 4.8.
+L<[perl #123976]|https://rt.perl.org/Ticket/Display.html?id=123976>
+
+=back
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+Repeated global pattern matches in scalar context on large tainted strings were
+exponentially slow depending on the current match position in the string.
+L<[perl #123202]|https://rt.perl.org/Ticket/Display.html?id=123202>
+
+=item *
+
+The original visible value of L<C<$E<sol>>|perlvar/$E<sol>> is now preserved
+when it is set to an invalid value. Previously if you set C<$/> to a reference
+to an array, for example, perl would produce a runtime error and not set PL_rs,
+but Perl code that checked C<$/> would see the array reference.
+L<[perl #123218]|https://rt.perl.org/Ticket/Display.html?id=123218>
+
+=item *
+
+Perl 5.14.0 introduced a bug whereby C<eval { LABEL: }> would crash. This has
+been fixed.
+L<[perl #123652]|https://rt.perl.org/Ticket/Display.html?id=123652>
+
+=item *
+
+Extending an array cloned from a parent thread could result in "Modification of
+a read-only value attempted" errors when attempting to modify the new elements.
+L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
+
+=item *
+
+Several cases of data used to store environment variable contents in core C
+code being potentially overwritten before being used have been fixed.
+L<[perl #123748]|https://rt.perl.org/Ticket/Display.html?id=123748>
+
+=item *
+
+UTF-8 variable names used in array indexes, unquoted UTF-8 HERE-document
+terminators and UTF-8 function names all now work correctly.
+L<[perl #124113]|https://rt.perl.org/Ticket/Display.html?id=124113>
+
+=item *
+
+A subtle bug introduced in Perl 5.20.2 involving UTF-8 in regular expressions
+and sometimes causing a crash has been fixed. A new test script has been added
+to test this fix; see under L</Testing>.
+L<[perl #124109]|https://rt.perl.org/Ticket/Display.html?id=124109>
+
+=item *
+
+Some patterns starting with C</.*..../> matched against long strings have been
+slow since Perl 5.8, and some of the form C</.*..../i> have been slow since
+Perl 5.18. They are now all fast again.
+L<[perl #123743]|https://rt.perl.org/Ticket/Display.html?id=123743>
+
+=item *
+
+Warning fatality is now ignored when rewinding the stack. This prevents
+infinite recursion when the now fatal error also causes rewinding of the stack.
+L<[perl #123398]|https://rt.perl.org/Ticket/Display.html?id=123398>
+
+=item *
+
+C<setpgrp($nonzero)> (with one argument) was accidentally changed in Perl 5.16
+to mean C<setpgrp(0)>. This has been fixed.
+
+=item *
+
+A crash with C<< %::=(); J->${\"::"} >> has been fixed.
+L<[perl #125541]|https://rt.perl.org/Ticket/Display.html?id=125541>
+
+=item *
+
+Regular expression possessive quantifier Perl 5.20 regression now fixed.
+C<qr/>I<PAT>C<{>I<min>,I<max>C<}+>C</> is supposed to behave identically to
+C<qr/(?E<gt>>I<PAT>C<{>I<min>,I<max>C<})/>. Since Perl 5.20, this didn't work
+if I<min> and I<max> were equal.
+L<[perl #125825]|https://rt.perl.org/Ticket/Display.html?id=125825>
+
+=item *
+
+Code like C</$a[/> used to read the next line of input and treat it as though
+it came immediately after the opening bracket. Some invalid code consequently
+would parse and run, but some code caused crashes, so this is now disallowed.
+L<[perl #123712]|https://rt.perl.org/Ticket/Display.html?id=123712>
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.20.3 represents approximately 7 months of development since Perl 5.20.2
+and contains approximately 3,200 lines of changes across 99 files from 26
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 1,500 lines of changes to 43 .pm, .t, .c and .h files.
+
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers. The following people are known to have contributed
+the improvements that became Perl 5.20.3:
+
+Alex Vandiver, Andy Dougherty, Aristotle Pagaltzis, Chris 'BinGOs' Williams,
+Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, David Mitchell,
+Father Chrysostomos, H.Merijn Brand, James E Keenan, James McCoy, Jarkko
+Hietaniemi, Karen Etheridge, Karl Williamson, kmx, Lajos Veres, Lukas Mai,
+Matthew Horsfall, Petr Písař, Randy Stauner, Ricardo Signes, Sawyer X, Steve
+Hay, Tony Cook, Yves Orton.
+
+The list above is almost certainly incomplete as it is automatically generated
+from version control history. In particular, it does not include the names of
+the (very much appreciated) contributors who reported issues to the Perl bug
+tracker.
+
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core. We're grateful to the entire CPAN community for
+helping Perl to flourish.
+
+For a more complete list of all of Perl's historical contributors, please see
+the F<AUTHORS> file in the Perl source distribution.
+
+=head1 Reporting Bugs
+
+If you find what you think is a bug, you might check the articles recently
+posted to the comp.lang.perl.misc newsgroup and the perl bug database at
+https://rt.perl.org/ . There may also be information at
+http://www.perl.org/ , the Perl Home Page.
+
+If you believe you have an unreported bug, please run the L<perlbug> program
+included with your release. Be sure to trim your bug down to a tiny but
+sufficient test case. Your bug report, along with the output of C<perl -V>,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+
+If the bug you are reporting has security implications, which make it
+inappropriate to send to a publicly archived mailing list, then please send it
+to perl5-security-report@perl.org. This points to a closed subscription
+unarchived mailing list, which includes all the core committers, who will be
+able to help assess the impact of issues, figure out a resolution, and help
+co-ordinate the release of patches to mitigate or fix the problem across all
+platforms on which Perl is supported. Please only use this address for
+security issues in the Perl core, not for modules independently distributed on
+CPAN.
+
+=head1 SEE ALSO
+
+The F<Changes> file for an explanation of how to view exhaustive details on
+what changed.
+
+The F<INSTALL> file for how to build Perl.
+
+The F<README> file for general stuff.
+
+The F<Artistic> and F<Copying> files for copyright information.
+
+=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5210delta - what is new for perl v5.21.0
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.0 release and the 5.20.0
-release.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<feature> has been upgraded from version 1.36 to 1.37.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 3.10 to 5.021001.
-
-=back
-
-=head2 Removed Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<CGI> has been removed from the core. It is still available on the CPAN.
-
-=item *
-
-L<Module::Build> has been removed from the core. It is still available on the
-CPAN.
-
-=item *
-
-L<Package::Constants> has been removed from the core. It is still available on
-the CPAN.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.0 represents approximately 12 hours of development since Perl 5.20.0
-and contains approximately 44,000 lines of changes across 190 files from 1
-author.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 33,000 lines of changes to 140 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.0:
-
-Nicholas Clark, Ricardo Signes.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl52110delta - what is new for perl v5.21.10
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.9 release and the 5.21.10
-release.
-
-If you are upgrading from an earlier release such as 5.21.8, first read
-L<perl5219delta>, which describes differences between 5.21.8 and 5.21.9.
-
-=head1 Incompatible Changes
-
-=head2 C<(?[...])> operators now follow standard Perl precedence
-
-This experimental feature allows set operations in regular expression patterns.
-Prior to this, the intersection operator had the same precedence as the other
-binary operators. Now it has higher precedence. This could lead to different
-outcomes than existing code expects (though the documentation has always noted
-that this change might happen, recommending fully parenthesizing the
-expressions). See L<perlrecharclass/Extended Bracketed Character Classes>.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-The functions C<utf8::native_to_unicode()> and C<utf8::unicode_to_native()>
-(see L<utf8>) are now optimized out on ASCII platforms. There is now not even
-a minimal performance hit in writing code portable between ASCII and EBCDIC
-platforms.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<B> has been upgraded from version 1.56 to 1.57.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.33 to 1.34.
-
-Deparse C<$#_> as that instead of as C<$#{_}>.
-L<[perl #123947]|https://rt.perl.org/Ticket/Display.html?id=123947>
-
-=item *
-
-L<Carp> has been upgraded from version 1.35 to 1.36.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.05 to 2.10.
-
-=over 4
-
-=item *
-
-Add support for C<Cwd::getdcwd()> and introduce workaround for a misbehaviour
-seen on Strawberry Perl 5.20.1.
-
-=item *
-
-Fix C<chdir()> after building dependencies bug.
-
-=item *
-
-Introduce experimental support for plugins/hooks.
-
-=item *
-
-Integrate the App::Cpan sources.
-
-=item *
-
-Do not check recursion on optional dependencies.
-
-=item *
-
-Sanity check META.yml to contain a hash.
-L<[cpan #95271]|https://rt.cpan.org/Ticket/Display.html?id=95271>
-
-=back
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.143240 to 2.150001.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.157 to 2.158.
-
-=item *
-
-L<DB> has been upgraded from version 1.07 to 1.08.
-
-=item *
-
-L<Devel::PPPort> has been upgraded from version 3.28 to 3.31.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.31 to 1.32.
-
-=item *
-
-L<Encode> has been upgraded from version 2.70 to 2.72.
-
-=item *
-
-L<encoding> has been upgraded from version 2.13 to 2.14.
-
-=item *
-
-L<Getopt::Long> has been upgraded from version 2.43 to 2.45.
-
-=item *
-
-L<locale> has been upgraded from version 1.05 to 1.06.
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.33 to 3.34.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20150220 to 5.20150320.
-
-=item *
-
-L<parent> has been upgraded from version 0.228 to 0.232.
-
-No changes to installed files other than the version bump.
-
-=item *
-
-The PathTools modules have been upgraded from version 3.54 to 3.55.
-
-=item *
-
-L<Pod::Functions> has been upgraded from version 1.08 to 1.09.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.51 to 1.52.
-
-=item *
-
-L<re> has been upgraded from version 0.31 to 0.32.
-
-=item *
-
-L<sigtrap> has been upgraded from version 1.07 to 1.08.
-
-=item *
-
-L<Term::Complete> has been upgraded from version 1.402 to 1.403.
-
-=item *
-
-L<Test::Simple> has been reverted from version 1.301001_098 to 1.001014.
-
-=item *
-
-L<Text::Balanced> has been upgraded from version 2.02 to 2.03.
-
-No changes to installed files other than the version bump.
-
-=item *
-
-L<Text::ParseWords> has been upgraded from version 3.29 to 3.30.
-
-=item *
-
-L<threads> has been upgraded from version 1.96_001 to 2.01.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.11 to 1.12.
-
-=item *
-
-L<utf8> has been upgraded from version 1.14 to 1.15.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perldata>
-
-=over 4
-
-=item *
-
-Documentation has been added regarding the special floating point values C<Inf>
-and C<NaN>.
-
-=back
-
-=head3 L<perlexperiment>
-
-=over 4
-
-=item *
-
-Removed note about C<\s> matching C<VT> now that it is no longer experimental.
-
-=item *
-
-Added note that C<use re 'strict'> has been introduced experimentally.
-
-=back
-
-=head3 L<perlpolicy>
-
-=over 4
-
-=item *
-
-The documentation of what to expect to see in future maintenance releases has
-been updated. Essentially the same types of changes will be included as before
-but with fewer changes that don't affect the installation or execution of perl.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Invalid quantifier in {,} in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Invalid quantifier in {,} in regex; marked by <-- HERE in m/%s/">
-
-(F) The pattern looks like a {min,max} quantifier, but the min or max could not
-be parsed as a valid number - either it has leading zeroes, or it represents
-too big a number to cope with. The S<<-- HERE> shows where in the regular
-expression the problem was discovered. See L<perlre>.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-Tests for performance issues have been added in the file F<t/perf/taint.t>.
-
-=back
-
-=head1 Platform Support
-
-=head2 New Platforms
-
-=over 4
-
-=item z/OS running EBCDIC Code Page 1047
-
-Core perl now works on this EBCDIC platform. Early perls also worked, but,
-even though support wasn't officially withdrawn, recent perls would not compile
-and run well. Perl 5.20 would work, but had many bugs which have now been
-fixed. Many CPAN modules that ship with Perl still fail tests, including
-Pod::Simple. However the version of Pod::Simple currently on CPAN should work;
-it was fixed too late to include in Perl 5.22. Work is under way to fix many
-of the still-broken CPAN modules, which likely will be installed on CPAN when
-completed, so that you may not have to wait until Perl 5.24 to get a working
-version.
-
-=back
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item HP-UX
-
-The archname now distinguishes use64bitint from use64bitall.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Macros have been created to allow XS code to better manipulate the POSIX locale
-category C<LC_NUMERIC>. See L<perlapi/Locale-related functions and macros>.
-
-=item *
-
-The previous C<atoi> et al replacement function, C<grok_atou>, has now been
-superseded by C<grok_atoUV>. See L<perlclib> for details.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Repeated global pattern matches in scalar context on large tainted strings were
-exponentially slow depending on the current match position in the string.
-L<[perl #123202]|https://rt.perl.org/Ticket/Display.html?id=123202>
-
-=item *
-
-Various crashes due to the parser getting confused by syntax errors have been
-fixed.
-L<[perl #123801]|https://rt.perl.org/Ticket/Display.html?id=123801>
-L<[perl #123802]|https://rt.perl.org/Ticket/Display.html?id=123802>
-L<[perl #123955]|https://rt.perl.org/Ticket/Display.html?id=123955>
-L<[perl #123995]|https://rt.perl.org/Ticket/Display.html?id=123995>
-
-=item *
-
-C<split> in the scope of lexical $_ has been fixed not to fail assertions.
-L<[perl #123763]|https://rt.perl.org/Ticket/Display.html?id=123763>
-
-=item *
-
-C<my $x : attr> syntax inside various list operators no longer fails
-assertions.
-L<[perl #123817]|https://rt.perl.org/Ticket/Display.html?id=123817>
-
-=item *
-
-An @ sign in quotes followed by a non-ASCII digit (which is not a valid
-identifier) would cause the parser to crash, instead of simply trying the @ as
-literal. This has been fixed.
-L<[perl #123963]|https://rt.perl.org/Ticket/Display.html?id=123963>
-
-=item *
-
-C<*bar::=*foo::=*glob_with_hash> has been crashing since Perl 5.14, but no
-longer does.
-L<[perl #123847]|https://rt.perl.org/Ticket/Display.html?id=123847>
-
-=item *
-
-C<foreach> in scalar context was not pushing an item on to the stack, resulting
-in bugs. (C<print 4, scalar do { foreach(@x){} } + 1> would print 5.) It has
-been fixed to return C<undef>.
-L<[perl #124004]|https://rt.perl.org/Ticket/Display.html?id=124004>
-
-=item *
-
-A memory leak introduced in Perl 5.21.6 has been fixed.
-L<[perl #123922]|https://rt.perl.org/Ticket/Display.html?id=123922>
-
-=item *
-
-A regression in the behaviour of the C<readline> built-in function, caused by
-the introduction of the C<< <<>> >> operator, has been fixed.
-L<[perl #123990]|https://rt.perl.org/Ticket/Display.html?id=123990>
-
-=item *
-
-Several cases of data used to store environment variable contents in core C
-code being potentially overwritten before being used have been fixed.
-L<[perl #123748]|https://rt.perl.org/Ticket/Display.html?id=123748>
-
-=back
-
-=head1 Known Problems
-
-=over 4
-
-=item *
-
-A goal is for Perl to be able to be recompiled to work reasonably well on any
-Unicode version. In Perl 5.22, though, the earliest such version is Unicode
-5.1 (current is 7.0).
-
-=item *
-
-EBCDIC platforms
-
-=over 4
-
-=item *
-
-Encode and encoding are mostly broken.
-
-=item *
-
-Many cpan modules that are shipped with core show failing tests.
-
-=item *
-
-C<pack>/C<unpack> with C<"U0"> format may not work properly.
-
-=back
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.10 represents approximately 4 weeks of development since Perl 5.21.9
-and contains approximately 170,000 lines of changes across 860 files from 27
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 170,000 lines of changes to 610 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed
-the improvements that became Perl 5.21.10:
-
-Chris 'BinGOs' Williams, David Golden, David Mitchell, David Wheeler, Father
-Chrysostomos, H.Merijn Brand, Hugo van der Sanden, James E Keenan, Jarkko
-Hietaniemi, Jasmine Ngan, Jerry D. Hedden, John Goodyear, Karen Etheridge, Karl
-Williamson, Lukas Mai, Matthew Horsfall, Nicholas Clark, Petr Písař, Rafael
-Garcia-Suarez, Reini Urban, Ricardo Signes, Sawyer X, Steffen Müller, Steve
-Hay, Sullivan Beck, Tony Cook, Vincent Pit.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at http://www.perl.org/ ,
-the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl52111delta - what is new for perl v5.21.11
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.10 release and the 5.21.11
-release.
-
-If you are upgrading from an earlier release such as 5.21.9, first read
-L<perl52110delta>, which describes differences between 5.21.9 and 5.21.10.
-
-=head1 Deprecations
-
-=head2 Making all warnings fatal is discouraged
-
-The documentation for L<fatal warnings|warnings/Fatal Warnings> notes that
-C<< use warnings FATAL => 'all' >> is discouraged and provides stronger
-language about the risks of fatal warnings in general.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<attributes> has been upgraded from version 0.26 to 0.27.
-
-=item *
-
-L<B> has been upgraded from version 1.57 to 1.58.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.34 to 1.35.
-
-C<< <<>> >> is now correctly deparsed.
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.23 to 0.24.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.10 to 2.11.
-
-=item *
-
-L<Cwd> has been upgraded from version 3.55 to 3.56.
-
-=item *
-
-L<ExtUtils::Miniperl> has been upgraded from version 1.04 to 1.05.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.27 to 3.28.
-
-=item *
-
-L<ExtUtils::Typemaps> has been upgraded from version 3.25 to 3.28.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.55 to 3.56.
-
-=item *
-
-L<if> has been upgraded from version 0.0603 to 0.0604.
-
-The documentation now notes that this module also works with C<no>.
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.36 to 0.37.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20150320 to 5.20150420.
-
-Updated to cover the latest releases of Perl. Also fixes a fencepost error in
-is_core() and copes with versions that do not match x.yyyzzz.
-
-=item *
-
-L<perl5db.pl> has been upgraded from 1.48 to 1.49.
-
-The debugger would cause an assertion failure.
-L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
-
-=item *
-
-L<PerlIO::mmap> has been upgraded from version 0.013 to 0.014.
-
-=item *
-
-L<utf8> has been upgraded from version 1.15 to 1.16.
-
-Minor documentation update only.
-
-=item *
-
-L<warnings> has been upgraded from version 1.31 to 1.32.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlebcdic>
-
-=over 4
-
-=item *
-
-This document has been significantly updated in the light of recent
-improvements to EBCDIC support.
-
-=back
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-Mention that C<study()> is currently a no-op.
-
-=back
-
-=head3 L<perlguts>
-
-=over 4
-
-=item *
-
-The OOK example has been updated to account for COW changes and a change in the
-storage of the offset.
-
-=back
-
-=head3 L<perlhacktips>
-
-=over 4
-
-=item *
-
-Documentation has been added illustrating the perils of assuming the contents
-of static memory pointed to by the return values of Perl wrappers for C library
-functions doesn't change.
-
-=back
-
-=head3 L<perlport>
-
-=over 4
-
-=item *
-
-Out-of-date VMS-specific information has been fixed/simplified.
-
-=back
-
-=head3 L<perluniintro>
-
-=over 4
-
-=item *
-
-Advice for how to make sure your strings and regular expression patterns are
-interpreted as Unicode has been revised to account for the new Perl 5.22 EBCDIC
-handling.
-
-=back
-
-=head3 L<perlvms>
-
-=over 4
-
-=item *
-
-Out-of-date and/or incorrect material has been removed.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-F<t/porting/re_context.t> has been added to test that L<utf8> and its
-dependencies only use the subset of the C<$1..$n> capture vars that
-Perl_save_re_context() is hard-coded to localize, because that function has no
-efficient way of determining at runtime what vars to localize.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Win32
-
-F<miniperl.exe> is now built with C<-fno-strict-aliasing>, allowing 64-bit
-builds to complete on GCC 4.8.
-L<[perl #123976]|https://rt.perl.org/Ticket/Display.html?id=123976>
-
-C<test-prep> again depends on C<test-prep-gcc> for GCC builds.
-L<[perl #124221]|https://rt.perl.org/Ticket/Display.html?id=124221>
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Perl 5.21.2 introduced a new build option, C<-DPERL_OP_PARENT>, which causes
-the last C<op_sibling> pointer to refer back to the parent rather than being
-C<NULL>, and where instead a new flag indicates the end of the chain. In this
-release, the new implementation has been revised; in particular:
-
-=over 4
-
-=item *
-
-On C<PERL_OP_PARENT> builds, the C<op_sibling> field has been renamed
-C<op_sibparent> to reflect its new dual purpose. Since the intention is that
-this field should primarily be accessed via macros, this change should be
-transparent for code written to work under C<PERL_OP_PARENT>.
-
-=item *
-
-The newly-introduced C<op_lastsib> flag bit has been renamed C<op_moresib> and
-its logic inverted; i.e. it is initialised to zero in a new op, and is changed
-to 1 when an op gains a sibling.
-
-=item *
-
-The function C<Perl_op_parent> is now only available on C<PERL_OP_PARENT>
-builds. Using it on a plain build will be a compile-timer error.
-
-=item *
-
-Three new macros, C<OpMORESIB_set>, C<OpLASTSIB_set>, C<OpMAYBESIB_set> have
-been added, which are intended to be a low-level portable way to set
-C<op_sibling> / C<op_sibparent> while also updating C<op_moresib>. The first
-sets the sibling pointer to a new sibling, the second makes the op the last
-sibling, and the third conditionally does the first or second action. The
-C<op_sibling_splice()> function is retained as a higher-level interface that
-can also maintain consistency in the parent at the same time (e.g. by updating
-C<op_first> and C<op_last> where appropriate).
-
-=item *
-
-The macro C<OpSIBLING_set>, added in Perl 5.21.2, has been removed. It didn't
-manipulate C<op_moresib> and has been superseded by C<OpMORESIB_set> et al.
-
-=item *
-
-The C<op_sibling_splice> function now accepts a null C<parent> argument where
-the splicing doesn't affect the first or last ops in the sibling chain, and
-thus where the parent doesn't need to be updated accordingly.
-
-=back
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-C<pack("D", $x)> and C<pack("F", $x)> now zero the padding on x86 long double
-builds. GCC 4.8 and later, under some build options, would either overwrite
-the zero-initialized padding, or bypass the initialized buffer entirely. This
-caused F<op/pack.t> to fail.
-L<[perl #123971]|https://rt.perl.org/Ticket/Display.html?id=123971>
-
-=item *
-
-Extending an array cloned from a parent thread could result in "Modification of
-a read-only value attempted" errors when attempting to modify the new elements.
-L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
-
-=item *
-
-An assertion failure and subsequent crash with C<< *x=<y> >> has been fixed.
-L<[perl #123790]|https://rt.perl.org/Ticket/Display.html?id=123790>
-
-=item *
-
-An optimization for state variable initialization introduced in Perl 5.21.6 has
-been reverted because it was found to exacerbate some other existing buggy
-behaviour.
-L<[perl #124160]|https://rt.perl.org/Ticket/Display.html?id=124160>
-
-=item *
-
-The extension of another optimization to cover more ops in Perl 5.21 has also
-been reverted to its Perl 5.20 state as a temporary fix for regression issues
-that it caused.
-L<[perl #123790]|https://rt.perl.org/Ticket/Display.html?id=123790>
-
-=item *
-
-New bitwise ops added in Perl 5.21.9 accidentally caused C<$^H |= 0x1c020000>
-to enable all features. This has now been fixed.
-
-=item *
-
-A possible crashing/looping bug has been fixed.
-L<[perl #124099]|https://rt.perl.org/Ticket/Display.html?id=124099>
-
-=item *
-
-UTF-8 variable names used in array indexes, unquoted UTF-8 HERE-document
-terminators and UTF-8 function names all now work correctly.
-L<[perl #124113]|https://rt.perl.org/Ticket/Display.html?id=124113>
-
-=item *
-
-Breakage in C<require(VERSION)> (with parentheses), introduced in Perl 5.21.6,
-has been fixed.
-L<[perl #124135]|https://rt.perl.org/Ticket/Display.html?id=124135>
-
-=item *
-
-Wide char warnings, wrongly raised in UTF-8 locales since Perl 5.21.8, are now
-suppressed.
-L<[perl #123527]|https://rt.perl.org/Ticket/Display.html?id=123527>
-
-=item *
-
-A subtle bug introduced in Perl 5.21.4 involving UTF-8 in regular expressions
-and sometimes causing a crash has been fixed. A new test script has been added
-to test this fix; see under L</Testing>.
-L<[perl #124109]|https://rt.perl.org/Ticket/Display.html?id=124109>
-
-=item *
-
-A change introduced in Perl 5.21.10 that broke the autovivification CPAN module
-has been reverted.
-
-=item *
-
-A bug whereby C<< 'FOO'->f() >> lost the read-only status of C<FOO>, introduced
-in Perl 5.21.7, has been fixed.
-L<[perl #123619]|https://rt.perl.org/Ticket/Display.html?id=123619>
-
-=item *
-
-A regression in Perl 5.21 in the matching of C</[A-Z]/ai> has been fixed.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.11 represents approximately 4 weeks of development since Perl 5.21.10
-and contains approximately 5,800 lines of changes across 240 files from 24
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 1,700 lines of changes to 160 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed
-the improvements that became Perl 5.21.11:
-
-Alex Vandiver, Andreas König, Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel
-Dragan, David Golden, David Mitchell, Father Chrysostomos, H.Merijn Brand,
-Herbert Breunung, Hugo van der Sanden, James E Keenan, James McCoy, Karl
-Williamson, Matthew Horsfall, Max Maischein, Nicholas Clark, Rafael
-Garcia-Suarez, Randy Stauner, Ricardo Signes, Shirakata Kentaro, Steffen
-Müller, Steve Hay, Tony Cook.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5211delta - what is new for perl v5.21.1
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.0 release and the 5.21.1
-release.
-
-If you are upgrading from an earlier release such as 5.20.0, first read
-L<perl5210delta>, which describes differences between 5.20.0 and 5.21.0.
-
-=head1 Notice
-
-This release removes a number of previously deprecated constructs, many
-that have been around for a long time. Please see L</"Incompatible Changes">
-for more information.
-
-=head1 Core Enhancements
-
-=head2 Unicode 7.0 is now supported
-
-For details on what is in this release, see
-L<http://www.unicode.org/versions/Unicode7.0.0/>.
-
-=head2 Experimental C Backtrace API
-
-Starting from Perl 5.21.1, on some platforms Perl supports retrieving
-the C level backtrace (similar to what symbolic debuggers like gdb do).
-
-The backtrace returns the stack trace of the C call frames,
-with the symbol names (function names), the object names (like "perl"),
-and if it can, also the source code locations (file:line).
-
-The supported platforms are Linux and OS X (some *BSD might work at
-least partly, but they have not yet been tested).
-
-The feature needs to be enabled with C<Configure -Dusecbacktrace>.
-
-Also included is a C API to retrieve backtraces.
-
-See L<perlhacktips/"C backtrace"> for more information.
-
-=head2 C<qr/foo/x> now ignores any Unicode pattern white space
-
-The C</x> regular expression modifier allows the pattern to contain
-white space and comments, both of which are ignored, for improved
-readability. Until now, not all the white space characters that Unicode
-designates for this purpose were handled. The additional ones now
-recognized are
-U+0085 NEXT LINE,
-U+200E LEFT-TO-RIGHT MARK,
-U+200F RIGHT-TO-LEFT MARK,
-U+2028 LINE SEPARATOR,
-and
-U+2029 PARAGRAPH SEPARATOR.
-
-=head2 S<C<use locale>> can restrict which locale categories are affected
-
-It is now possible to pass a parameter to S<C<use locale>> to specify
-a subset of locale categories to be locale-aware, with the remaining
-ones unaffected. See L<perllocale/The "use locale" pragma> for details.
-
-=head1 Incompatible Changes
-
-=head2 C<\N{}> with a sequence of multiple spaces is now a fatal error.
-
-This has been deprecated since v5.18.
-
-=head2 In double-quotish C<\cI<X>>, I<X> must now be a printable ASCII character
-
-In prior releases, failure to do this raised a deprecation warning.
-
-=head2 Splitting the tokens C<(?> and C<(*> in regular expressions is
-now a fatal compilation error.
-
-These had been deprecated since v5.18.
-
-=head2 5 additional characters are treated as white space under C</x> in
-regex patterns (unless escaped)
-
-The use of these characters with C</x> outside bracketed character
-classes and when not preceded by a backslash has raised a deprecation
-warning since v5.18. Now they will be ignored. See L</"qr/foo/x">
-for the list of the five characters.
-
-=head2 Comment lines within S<C<(?[ ])>> now are ended only by a C<\n>
-
-S<C<(?[ ])>> is an experimental feature, introduced in v5.18. It operates
-as if C</x> is always enabled. But there was a difference, comment
-lines (following a C<#> character) were terminated by anything matching
-C<\R> which includes all vertical whitespace, such as form feeds. For
-consistency, this is now changed to match what terminates comment lines
-outside S<C<(?[ ])>>, namely a C<\n> (even if escaped), which is the
-same as what terminates a heredoc string and formats.
-
-=head2 Omitting % and @ on hash and array names is no longer permitted
-
-Really old Perl let you omit the @ on array names and the % on hash
-names in some spots. This has issued a deprecation warning since Perl
-5.0, and is no longer permitted.
-
-=head2 C<"$!"> text is now in English outside C<"use locale"> scope
-
-Previously, the text, unlike almost everything else, always came out
-based on the current underlying locale of the program. (Also affected
-on some systems is C<"$^E>".) For programs that are unprepared to
-handle locale, this can cause garbage text to be displayed. It's better
-to display text that is translatable via some tool than garbage text
-which is much harder to figure out.
-
-=head2 C<"$!"> text will be returned in UTF-8 when appropriate
-
-The stringification of C<$!> and C<$^E> will have the UTF-8 flag set
-when the text is actually non-ASCII UTF-8. This will enable programs
-that are set up to be locale-aware to properly output messages in the
-user's native language. Code that needs to continue the 5.20 and
-earlier behavior can do the stringification within the scopes of both
-'use bytes' and 'use locale ":messages". No other Perl operations will
-be affected by locale; only C<$!> and C<$^E> stringification. The
-'bytes' pragma causes the UTF-8 flag to not be set, just as in previous
-Perl releases. This resolves [perl #112208].
-
-=head2 Support for C<?PATTERN?> without explicit operator has been removed
-
-Starting regular expressions matching only once directly with the
-question mark delimiter is now a syntax error, so that the question mark
-can be available for use in new operators. Write C<m?PATTERN?> instead,
-explicitly using the C<m> operator: the question mark delimiter still
-invokes match-once behaviour.
-
-=head2 C<defined(@array)> and C<defined(%hash)> are now fatal errors
-
-These have been deprecated since v5.6.1 and have raised deprecation
-warnings since v5.16.
-
-=head2 Using a hash or an array as a reference are now fatal errors.
-
-For example, C<%foo-E<gt>{"bar"}> now causes a fatal compilation
-error. These have been deprecated since before v5.8, and have raised
-deprecation warnings since then.
-
-=head1 Deprecations
-
-=head2 Using a NO-BREAK space in a character alias for C<\N{...}> is now
-deprecated
-
-This non-graphic character is essentially indistinguishable from a
-regular space, and so should not be allowed. See
-L<charnames/CUSTOM ALIASES>.
-
-=head2 A literal C<"{"> should now be escaped in a pattern
-
-If you want a literal left curly bracket (also called a left brace) in a
-regular expression pattern, you should now escape it by either
-preceding it with a backslash (C<"\{">) or enclosing it within square
-brackets C<"[{]">, or by using C<\Q>; otherwise a deprecation warning
-will be raised. This was first announced as forthcoming in the v5.16
-release; it will allow future extensions to the language to happen.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Many internal functions have been refactored to improve performance and reduce
-their memory footprints.
-
-L<[perl #121436]|https://rt.perl.org/Ticket/Display.html?id=121436>
-L<[perl #121906]|https://rt.perl.org/Ticket/Display.html?id=121906>
-L<[perl #121969]|https://rt.perl.org/Ticket/Display.html?id=121969>
-
-=item *
-
-C<-T> and C<-B> filetests will return sooner when an empty file is detected.
-
-L<perl #121489|https://rt.perl.org/Ticket/Display.html?id=121489>
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-The libnet collection of modules has been upgraded from version 1.25 to 1.27.
-
-There are only whitespace changes to the installed files.
-
-=item *
-
-A mismatch between the documentation and the code in utf8::downgrade()
-was fixed in favour of the documentation. The optional second argument
-is now correctly treated as a perl boolean (true/false semantics) and
-not as an integer.
-
-=item *
-
-The Locale-Codes collection of modules has been upgraded from version 3.30 to 3.31.
-
-Fixed a bug in the scripts used to extract data from spreadsheets that
-prevented the SHP currency code from being found.
-L<[cpan #94229]|https://rt.cpan.org/Ticket/Display.html?id=94229>
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 1.96 to 2.00.
-
-=item *
-
-L<autodie> has been upgraded from version 2.23 to 2.25.
-
-=item *
-
-L<B> has been upgraded from version 1.48 to 1.49.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.26 to 1.27.
-
-=item *
-
-L<Benchmark> has been upgraded from version 1.18 to 1.19.
-
-=item *
-
-L<Carp> has been upgraded from version 1.3301 to 1.34.
-
-Carp::Heavy now ignores version mismatches with Carp if Carp is newer
-than 1.12, since Carp::Heavy's guts were merged into Carp at that
-point.
-L<[perl #121574]|https://rt.perl.org/Ticket/Display.html?id=121574>
-
-=item *
-
-L<charnames> has been upgraded from version 1.40 to 1.41.
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.140640 to 2.141520.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.151 to 2.152.
-
-Changes to resolve Coverity issues.
-
-XS dumps incorrectly stored the name of code references stored in a
-GLOB.
-L<[perl #122070]|https://rt.perl.org/Ticket/Display.html?id=122070>
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.16 to 1.17.
-
-=item *
-
-L<Devel::PPPort> has been upgraded from version 3.21 to 3.24.
-
-=item *
-
-L<Digest::SHA> has been upgraded from version 5.88 to 5.92.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.25 to 1.26.
-
-=item *
-
-L<Encode> has been upgraded from version 2.60 to 2.62.
-
-B<piconv> now has better error handling when the encoding name is nonexistent,
-and a build breakage when upgrading L<Encode> in perl-5.8.2 and earlier has
-been fixed.
-
-=item *
-
-L<Errno> has been upgraded from version 1.20_03 to 1.20_04.
-
-=item *
-
-L<Exporter> has been upgraded from version 5.70 to 5.71.
-
-=item *
-
-L<ExtUtils::Install> has been upgraded from version 1.67 to 1.68.
-
-=item *
-
-L<ExtUtils::Miniperl> has been upgraded from version 1.01 to 1.02.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.24 to 3.25.
-
-=item *
-
-L<ExtUtils::Typemaps> has been upgraded from version 3.24 to 3.25.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.47 to 3.48.
-
-=item *
-
-L<Hash::Util> has been upgraded from version 0.16 to 0.17.
-
-Minor bug fixes and documentation fixes to Hash::Util::hash_stats()
-
-=item *
-
-L<IO> has been upgraded from version 1.31 to 1.32.
-
-=item *
-
-L<List::Util> has been upgraded from version 1.38 to 1.39.
-
-=item *
-
-L<locale> has been upgraded from version 1.03 to 1.04.
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.30 to 3.31.
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.9993 to 1.9995.
-
-Synchronize POD changes from the CPAN release.
-
-C<< Math::BigFloat->blog(x) >> would sometimes return blog(2*x) when
-the accuracy was greater than 70 digits.
-
-The result of C<< Math::BigFloat->bdiv() >> in list context now
-satisfies C<< x = quotient * divisor + remainder >>.
-
-=item *
-
-L<Math::BigRat> has been upgraded from version 0.2606 to 0.2608.
-
-Synchronize POD changes from the CPAN release.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.021001 to 5.021001_01.
-
-=item *
-
-L<Module::Metadata> has been upgraded from version 1.000019 to 1.000024.
-
-Support installations on older perls with an L<ExtUtils::MakeMaker> earlier
-than 6.63_03
-
-=item *
-
-L<NDBM_File> has been upgraded from version 1.12 to 1.13.
-
-=item *
-
-L<OS2::Process> has been upgraded from version 1.09 to 1.10.
-
-=item *
-
-L<perl5db.pl> has been upgraded from version 1.44 to 1.45.
-
-fork() in the debugger under C<tmux> will now create a new window for
-the forked process. L<[perl
-#121333]|https://rt.perl.org/Ticket/Display.html?id=121333>
-
-The debugger now saves the current working directory on startup and
-restores it when you restart your program with C<R> or C<rerun>. L<[perl
-#121509]|https://rt.perl.org/Ticket/Display.html?id=121509>
-
-=item *
-
-L<PerlIO::encoding> has been upgraded from version 0.18 to 0.19.
-
-No changes in behaviour.
-
-=item *
-
-L<PerlIO::mmap> has been upgraded from version 0.011 to 0.013.
-
-No changes in behaviour.
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.18 to 0.19.
-
-No changes in behaviour.
-
-=item *
-
-L<PerlIO::via> has been upgraded from version 0.14 to 0.15.
-
-=item *
-
-L<Pod::Html> has been upgraded from version 1.21 to 1.22.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.38_03 to 1.40.
-
-=item *
-
-L<Scalar::Util> has been upgraded from version 1.38 to 1.39.
-
-=item *
-
-L<SelfLoader> has been upgraded from version 1.21 to 1.22.
-
-=item *
-
-L<Socket> has been upgraded from version 2.013 to 2.014.
-
-=item *
-
-L<Storable> has been upgraded from version 2.49 to 2.51.
-
-=item *
-
-L<Term::ANSIColor> has been upgraded from version 4.02 to 4.03.
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.30 to 3.32.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.001002 to 1.001003.
-
-=item *
-
-L<threads> has been upgraded from version 1.93 to 1.94.
-
-=item *
-
-L<Tie::File> has been upgraded from version 1.00 to 1.01.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.04 to 1.07.
-
-Version 0.67's improved discontiguous contractions is invalidated by default
-and is supported as a parameter 'long_contraction'.
-
-=item *
-
-L<Unicode::Normalize> has been upgraded from version 1.17 to 1.18.
-
-The XSUB implementation has been removed in favour of pure Perl.
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.57 to 0.58.
-
-=item *
-
-L<utf8> has been upgraded from version 1.13 to 1.14.
-
-=item *
-
-L<warnings> has been upgraded from version 1.23 to 1.24.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-C<-l> now notes that it will return false if symlinks aren't supported by the
-file system.
-
-L<[perl #121523]|https://rt.perl.org/Ticket/Display.html?id=121523>
-
-=item *
-
-Note that C<exec LIST> and C<system LIST> may fall back to the shell on
-Win32. Only C<exec PROGRAM LIST> and C<system PROGRAM LIST> indirect object
-syntax will reliably avoid using the shell.
-
-This has also been noted in L<perlport>.
-
-L<[perl #122046]|https://rt.perl.org/Ticket/Display.html?id=122046>
-
-=back
-
-=head3 L<perlapi>
-
-=over 4
-
-=item *
-
-Note that C<SvSetSV> doesn't do set magic.
-
-=item *
-
-C<sv_usepvn_flags> - Fix documentation to mention the use of C<NewX> instead of
-C<malloc>.
-
-L<[perl #121869]|https://rt.perl.org/Ticket/Display.html?id=121869>
-
-=item *
-
-Clarify where C<NUL> may be embedded or is required to terminate a string.
-
-=item *
-
-Previously missing documentation due to formatting errors are now included.
-
-=item *
-
-Entries are now organized into groups rather than by file where they are found.
-
-=item *
-
-Alphabetical sorting of entries is now handled by the POD generator to make
-entries easier to find when scanning.
-
-=back
-
-=head3 L<perlhacktips>
-
-=over 4
-
-=item *
-
-Updated documentation for the C<test.valgrind> C<make> target.
-
-L<[perl #121431]|https://rt.perl.org/Ticket/Display.html?id=121431>
-
-=back
-
-=head3 L<perlre>
-
-=over 4
-
-=item *
-
-The C</x> modifier has been clarified to note that comments cannot be continued
-onto the next line by escaping them.
-
-=back
-
-=head3 L<Unicode::UCD>
-
-=over 4
-
-=item *
-
-The documentation includes many clarifications and fixes.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<In '(?...)', the '(' and '?' must be adjacent in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"In '(?...)', the '(' and '?' must be adjacent in regex; marked by <-- HERE in m/%s/">
-
-(F) The two-character sequence C<"(?"> in
-this context in a regular expression pattern should be an
-indivisible token, with nothing intervening between the C<"(">
-and the C<"?">, but you separated them.
-
-=item *
-
-L<In '(*VERB...)', the '(' and '*' must be adjacent in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"In '(*VERB...)', the '(' and '*' must be adjacent in regex; marked by <-- HERE in m/%s/">
-
-(F) The two-character sequence C<"(*"> in
-this context in a regular expression pattern should be an
-indivisible token, with nothing intervening between the C<"(">
-and the C<"*">, but you separated them.
-
-=item *
-
-L<charnames alias definitions may not contain a sequence of multiple spaces|perldiag/"charnames alias definitions may not contain a sequence of multiple spaces">
-
-(F) You defined a character name which had multiple space
- characters in a row. Change them to single spaces. Usually these
- names are defined in the C<:alias> import argument to C<use charnames>, but
- they could be defined by a translator installed into C<$^H{charnames}>.
- See L<charnames/CUSTOM ALIASES>.
-
-=item *
-
-L<charnames alias definitions may not contain trailing white-space|perldiag/"charnames alias definitions may not contain trailing white-space">
-
-(F) You defined a character name which ended in a space
-character. Remove the trailing space(s). Usually these names are
-defined in the C<:alias> import argument to C<use charnames>, but they
-could be defined by a translator installed into C<$^H{charnames}>.
-See L<charnames/CUSTOM ALIASES>.
-
-=item *
-
-L<Can't use a hash as a reference|perldiag/"Can't use a hash as a reference">
-
-(F) You tried to use a hash as a reference, as in
-C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl E<lt>= 5.6.1
-used to allow this syntax, but shouldn't have.
-
-=item *
-
-L<Can't use an array as a reference|perldiag/"Can't use an array as a reference">
-
-(F) You tried to use an array as a reference, as in
-C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl E<lt>= 5.6.1 used to
-allow this syntax, but shouldn't have.
-
-=item *
-
-L<Can't use 'defined(@array)' (Maybe you should just omit the defined()?)|perldiag/"Can't use 'defined(@array)' (Maybe you should just omit the defined()?)">
-
-(F) defined() is not useful on arrays because it
-checks for an undefined I<scalar> value. If you want to see if the
-array is empty, just use C<if (@array) { # not empty }> for example.
-
-=item *
-
-L<Can't use 'defined(%hash)' (Maybe you should just omit the defined()?)|perldiag/"Can't use 'defined(%hash)' (Maybe you should just omit the defined()?)">
-
-(F) C<defined()> is not usually right on hashes.
-
-Although C<defined %hash> is false on a plain not-yet-used hash, it
-becomes true in several non-obvious circumstances, including iterators,
-weak references, stash names, even remaining true after C<undef %hash>.
-These things make C<defined %hash> fairly useless in practice, so it now
-generates a fatal error.
-
-If a check for non-empty is what you wanted then just put it in boolean
-context (see L<perldata/Scalar values>):
-
- if (%hash) {
- # not empty
- }
-
-If you had C<defined %Foo::Bar::QUUX> to check whether such a package
-variable exists then that's never really been reliable, and isn't
-a good way to enquire about the features of a package, or whether
-it's loaded, etc.
-
-=item *
-
-L<Illegal suidscript|perldiag/"Illegal suidscript">
-
-(F) The script run under suidperl was somehow illegal.
-
-=back
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/%s/">
-
-(D deprecated, regexp) You used a literal C<"{"> character in a regular
-expression pattern. You should change to use C<"\{"> instead, because a future
-version of Perl (tentatively v5.26) will consider this to be a syntax error. If
-the pattern delimiters are also braces, any matching right brace
-(C<"}">) should also be escaped to avoid confusing the parser, for
-example,
-
- qr{abc\{def\}ghi}
-
-=item *
-
-L<NO-BREAK SPACE in a charnames alias definition is deprecated|perldiag/"NO-BREAK SPACE in a charnames alias definition is deprecated">
-
-(D deprecated) You defined a character name which contained a no-break
-space character. Change it to a regular space. Usually these names are
-defined in the C<:alias> import argument to C<use charnames>, but they
-could be defined by a translator installed into C<$^H{charnames}>. See
-L<charnames/CUSTOM ALIASES>.
-
-=item *
-
-L<PerlIO layer ':win32' is experimental|perldiag/"PerlIO layer ':win32' is experimental">
-
-(S experimental::win32_perlio) The C<:win32> PerlIO layer is
-experimental. If you want to take the risk of using this layer,
-simply disable this warning:
-
- no warnings "experimental::win32_perlio";
-
-=item *
-
-L<Negative repeat count does nothing|perldiag/"Negative repeat count does nothing">
-
-(W numeric) You tried to execute the
-L<C<x>|perlop/Multiplicative Operators> repetition operator fewer than 0
-times, which doesn't make sense.
-
-=item *
-
-L<localtime(%f) failed|perldiag/"localtime(%f) failed">
-
-(W overflow) You called C<localtime> with a number that it could not handle:
-too large, too small, or NaN. The returned value is C<undef>.
-
-=item *
-
-L<gmtime(%f) failed|perldiag/"gmtime(%f) failed">
-
-(W overflow) You called C<gmtime> with a number that it could not handle:
-too large, too small, or NaN. The returned value is C<undef>.
-
-=item *
-
-L<PerlIO layer ':win32' is experimental|perldiag/"PerlIO layer ':win32' is experimental">:
-
-(S experimental::win32_perlio) The C<:win32> PerlIO layer is
-experimental. If you want to take the risk of using this layer,
-simply disable this warning:
-
- no warnings "experimental::win32_perlio";
-
-=item *
-
-L<Negative repeat count does nothing|perldiag/"Negative repeat count does nothing">
-
-(W numeric) This warns when the repeat count of the
-L<C<x>|perlop/Multiplicative Operators> repetition operator is
-negative.
-
-This warning may be changed or removed if it turn out that it was
-unwise to have added it.
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-L<Variable length lookbehind not implemented in regex mE<sol>%sE<sol>|perldiag/"Variable length lookbehind not implemented in regex m/%s/">
-
-Information about Unicode behaviour has been added.
-
-=item *
-
-<> should be quotes
-
-This warning has been changed to
-L<< <> at require-statement should be quotes|perldiag/"<> at require-statement should be quotes" >>
-to make the issue more identifiable.
-
-=item *
-
-L<Unsuccessful %s on filename containing newline|perldiag/"Unsuccessful %s on filename containing newline">
-
-This warning is now only produced when the newline is at the end of
-the filename.
-
-=back
-
-=head1 Utility Changes
-
-=head2 F<x2p/>
-
-=over 4
-
-=item *
-
-The F<x2p/> directory has been removed from the Perl core.
-
-This removes find2perl, s2p and a2p. They have all been released to CPAN as
-separate distributions (App::find2perl, App::s2p, App::a2p).
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-C<make test.valgrind> now supports parallel testing.
-
-For example:
-
- TEST_JOBS=9 make test.valgrind
-
-See L<perlhacktips/valgrind> for more information.
-
-L<[perl #121431]|https://rt.perl.org/Ticket/Display.html?id=121431>
-
-=item *
-
-The MAD (Misc Attribute Decoration) build option has been removed
-
-This was an unmaintained attempt at preserving
-the Perl parse tree more faithfully so that automatic conversion of
-Perl 5 to Perl 6 would have been easier.
-
-This build-time configuration option had been unmaintained for years,
-and had probably seriously diverged on both Perl 5 and Perl 6 sides.
-
-=back
-
-=head1 Platform Support
-
-=head2 Discontinued Platforms
-
-=over 4
-
-=item NeXTSTEP/OPENSTEP
-
-NeXTSTEP was proprietary OS bundled with NeXT's workstations in the early
-to mid 90's; OPENSTEP was an API specification that provided a NeXTSTEP-like
-environment on a non-NeXTSTEP system. Both are now long dead, so support
-for building Perl on them has been removed.
-
-=back
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item OpenBSD
-
-On OpenBSD, Perl will now default to using the system C<malloc> due to the
-security features it provides. Perl's own malloc wrapper has been in use
-since v5.14 due to performance reasons, but the OpenBSD project believes
-the tradeoff is worth it and would prefer that users who need the speed
-specifically ask for it.
-
-L<[perl #122000]|https://rt.perl.org/Ticket/Display.html?id=122000>.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-The deprecated variable C<PL_sv_objcount> has been removed.
-
-=item *
-
-Perl now tries to keep the locale category C<LC_NUMERIC> set to "C"
-except around operations that need it to be set to the program's
-underlying locale. This protects the many XS modules that cannot cope
-with the decimal radix character not being a dot. Prior to this
-release, Perl initialized this category to "C", but a call to
-C<POSIX::setlocale()> would change it. Now such a call will change the
-underlying locale of the C<LC_NUMERIC> category for the program, but the
-locale exposed to XS code will remain "C". There is an API under
-development for those relatively few modules that need to use the
-underlying locale. This API will be nailed down during the course of
-developing v5.21. Send email to L<mailto:perl5-porters@perl.org> for
-guidance.
-
-=item *
-
-A new macro L<C<isUTF8_CHAR>|perlapi/isUTF8_CHAR> has been written which
-efficiently determines if the string given by its parameters begins
-with a well-formed UTF-8 encoded character.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-index() and rindex() no longer crash when used on strings over 2GB in
-size.
-L<[perl #121562]|https://rt.perl.org/Ticket/Display.html?id=121562>.
-
-=item *
-
-A small previously intentional memory leak in PERL_SYS_INIT/PERL_SYS_INIT3 on
-Win32 builds was fixed. This might affect embedders who repeatedly create and
-destroy perl engines within the same process.
-
-=item *
-
-C<POSIX::localeconv()> now returns the data for the program's underlying
-locale even when called from outside the scope of S<C<use locale>>.
-
-=item *
-
-C<POSIX::localeconv()> now works properly on platforms which don't have
-C<LC_NUMERIC> and/or C<LC_MONETARY>, or for which Perl has been compiled
-to disregard either or both of these locale categories. In such
-circumstances, there are now no entries for the corresponding values in
-the hash returned by C<localeconv()>.
-
-=item *
-
-C<POSIX::localeconv()> now marks appropriately the values it returns as
-UTF-8 or not. Previously they were always returned as a bytes, even if
-they were supposed to be encoded as UTF-8.
-
-=item *
-
-On Microsoft Windows, within the scope of C<S<use locale>>, the following
-POSIX character classes gave results for many locales that did not
-conform to the POSIX standard:
-C<[[:alnum:]]>,
-C<[[:alpha:]]>,
-C<[[:blank:]]>,
-C<[[:digit:]]>,
-C<[[:graph:]]>,
-C<[[:lower:]]>,
-C<[[:print:]]>,
-C<[[:punct:]]>,
-C<[[:upper:]]>,
-C<[[:word:]]>,
-and
-C<[[:xdigit:]]>.
-These are because the underlying Microsoft implementation does not
-follow the standard. Perl now takes special precautions to correct for
-this.
-
-=item *
-
-Many issues have been detected by L<Coverity|http://www.coverity.com/> and
-fixed.
-
-=item *
-
-system() and friends should now work properly on more Android builds.
-
-Due to an oversight, the value specified through -Dtargetsh to Configure
-would end up being ignored by some of the build process. This caused perls
-cross-compiled for Android to end up with defective versions of system(),
-exec() and backticks: the commands would end up looking for C</bin/sh>
-instead of C</system/bin/sh>, and so would fail for the vast majority
-of devices, leaving C<$!> as C<ENOENT>.
-
-=item *
-
-C<qr(...\(...\)...)>,
-C<qr[...\[...\]...]>,
-and
-C<qr{...\{...\}...}>
-now work. Previously it was impossible to escape these three
-left-characters with a backslash within a regular expression pattern
-where otherwise they would be considered metacharacters, and the pattern
-opening delimiter was the character, and the closing delimiter was its
-mirror character.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.1 represents approximately 3 weeks of development since Perl 5.21.0
-and contains approximately 240,000 lines of changes across 680 files from 37
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 150,000 lines of changes to 420 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.1:
-
-Alex Solovey, Andrew Fresh, Andy Dougherty, Brian Fraser, Chris 'BinGOs'
-Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, Darin
-McBride, David Mitchell, Doug Bell, H.Merijn Brand, James E Keenan, Jarkko
-Hietaniemi, kafka, Karen Etheridge, Karl Williamson, Leon Timmermans, Matthew
-Horsfall, Michael Bunk, Nicholas Clark, Niels Thykier, Norman Koch, Peter John
-Acklam, Pierre Bogossian, Reini Urban, Ricardo Signes, Rob Hoelz, Shlomi Fish,
-Smylers, Steffen Müller, Steve Hay, Sullivan Beck, Thomas Sibley, Todd
-Rinaldo, Tony Cook, Yves Orton.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5212delta - what is new for perl v5.21.2
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.1 release and the 5.21.2
-release.
-
-If you are upgrading from an earlier release such as 5.21.0, first read
-L<perl5211delta>, which describes differences between 5.21.0 and 5.21.1.
-
-=head1 Core Enhancements
-
-=head2 Better heuristics on older platforms for determining locale UTF8ness
-
-On platforms that implement neither the C99 standard nor the POSIX 2001
-standard, determining if the current locale is UTF8 or not depends on
-heuristics. These are improved in this release.
-
-=head1 Security
-
-=head2 Perl is now always compiled with -D_FORTIFY_SOURCE=2 if available
-
-The 'code hardening' option called C<_FORTIFY_SOURCE>, available in
-gcc 4.*, is now always used for compiling Perl, if available.
-
-Note that this isn't necessarily a huge step since in many platforms
-the step had already been taken several years ago: many Linux
-distributions (like Fedora) have been using this option for Perl,
-and OS X has enforced the same for many years.
-
-
-=head1 Deprecations
-
-=head2 C<< /\C/ >> character class
-
-This character class, which matches a single byte, even if it appears
-in a multi-byte character has been deprecated. Matching single bytes
-in a multi-byte character breaks encapsulation, and can corrupt utf8
-strings.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Refactoring of C<< pp_tied >> and CC<< pp_ref >> for small improvements.
-
-=item *
-
-Pathtools don't try to load XS on miniperl.
-
-=item *
-
-A typo fix reduces the size of the C<< OP >> structure.
-
-=item *
-
-Hash lookups where the key is a constant is faster.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<arybase> has been upgraded from version 0.07 to 0.08.
-
-=item *
-
-L<B> has been upgraded from version 1.49 to 1.50.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.17 to 1.18.
-
-=item *
-
-L<experimental> has been upgraded from version 0.007 to 0.008.
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded from version 1.63 to 1.64.
-
-=item *
-
-L<File::Copy> has been upgraded from version 2.29 to 2.30.
-
-=item *
-
-The PathTools module collection (L<File::Spec> and friends) has been
-upgraded from version 3.48 to 3.49.
-
-=item *
-
-L<Filter::Simple> has been upgraded from version 0.91 to 0.92.
-
-=item *
-
-L<Hash::Util> has been upgraded from version 0.17 to 0.18.
-
-=item *
-
-L<IO> has been upgraded from version 1.32 to 1.33.
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.29 to 0.31.
-
-A better fix for subclassing C<connect()>.
-L<[cpan #95983]|https://rt.cpan.org/Ticket/Display.html?id=95983>
-L<[cpan #97050]|https://rt.cpan.org/Ticket/Display.html?id=97050>
-
-=item *
-
-L<IPC::Open3> has been upgraded from version 1.16 to 1.17.
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.9995 to 1.9996.
-
-Correct handling of subclasses.
-L<[cpan #96254]|https://rt.cpan.org/Ticket/Display.html?id=96254>
-L<[cpan #96329]|https://rt.cpan.org/Ticket/Display.html?id=96329>
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.021001_01 to 5.021002.
-
-=item *
-
-L<Pod::Usage> has been upgraded from version 1.63 to 1.64.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.40 to 1.41.
-
-=item *
-
-L<threads> has been upgraded from version 1.94 to 1.95.
-
-=item *
-
-L<warnings> has been upgraded from version 1.24 to 1.26.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<< perlpolicy >>
-
-=over 4
-
-=item *
-
-We now have a code of conduct for the I<< p5p >> mailing list, as documented
-in L<< perlpolicy/STANDARDS OF CONDUCT >>.
-
-=back
-
-=head3 L<< perlfunc >>
-
-=over 4
-
-=item *
-
-Improve documentation of C<< our >>.
-
-=back
-
-=head3 L<< perlsyn >>
-
-=over 4
-
-=item *
-
-The empty conditional in C<< for >> and C<< while >> is now documented
-in L<< perlsyn >>.
-
-=back
-
-=head1 Diagnostics
-
-=head2 New Diagnostics
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Argument "%s" treated as 0 in increment (++)|perldiag/"Argument "%s" treated
-as 0 in increment (++)">
-
-(W numeric) The indicated string was fed as an argument to the C<++> operator
-which expects either a number or a string matching C</^[a-zA-Z]*[0-9]*\z/>.
-See L<perlop/Auto-increment and Auto-decrement> for details.
-
-=item *
-
-L<Redundant argument in %s|perldiag/Redundant argument in %s>
-
-(W redundant) You called a function with more arguments than other
-arguments you supplied indicated would be needed. Currently only
-emitted when a printf-type format required fewer arguments than were
-supplied, but might be used in the future for e.g. L<perlfunc/pack>.
-
-The warnings category C<< redundant >> is new. See also [RT #121025]
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-A new compilation flag, C<< -DPERL_OP_PARENT >> is available. For details,
-see the discussion below at L<< /Internal Changes >>.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-C<< test.pl >> now allows C<< plan skip_all => $reason >>, to make it
-more compatible with C<< Test::More >>.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Solaris
-
-Builds on Solaris 10 with C<-Dusedtrace> would fail early since make
-didn't follow implied dependencies to build C<perldtrace.h>. Added an
-explicit dependency to C<depend>.
-L<[perl #120120]|https://rt.perl.org/Ticket/Display.html?id=120120>
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-The following private API functions had their context parameter removed,
-C<Perl_cast_ulong>, C<Perl_cast_i32>, C<Perl_cast_iv>, C<Perl_cast_uv>,
-C<Perl_cv_const_sv>, C<Perl_mg_find>, C<Perl_mg_findext>, C<Perl_mg_magical>,
-C<Perl_mini_mktime>, C<Perl_my_dirfd>, C<Perl_sv_backoff>, C<Perl_utf8_hop>.
-
-Users of the public API prefix-less calls remain unaffected.
-
-=item *
-
-Experimental support for ops in the optree to be able to locate their
-parent, if any. A general-purpose function, C<< op_sibling_splice() >>
-allows for general manipulating an C<< op_sibling >> chain. The last op
-in such a chain is now marked with the field C<< op_lastsib >>.
-
-A new build define, C<< -DPERL_OP_PARENT >> has been added; if
-given, it forces the core to use C<< op_lastsib >> to detect the
-last sibling in a chain, freeing the last C<< op_sibling >> pointer,
-which then points back to the parent (instead of being C<< NULL >>).
-
-A C-level C<< op_parent() >> function, and a C<< B >> C<< parent() >> method
-have been added; under a default build, they return C<< NULL >>, but when
-C<< -DPERL_OP_PARENT >> has been set, they return the parent of the current op.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-C<< s///e >> on tainted utf8 strings got C<< pos() >> messed up. This bug,
-introduced in 5.20, is now fixed. [RT #122148]
-
-=item *
-
-A non-word boundary in a regular expression (C<< \B >>) did not always
-match the end of the string; in particular C<< q{} =~ /\B/ >> did not
-match. This bug, introduced in perl 5.14, is now fixed. [RT #122090]
-
-=item *
-
-C<< " P" =~ /(?=.*P)P/ >> should match, but did not. This is now fixed.
-[RT #122171].
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.2 represents approximately 4 weeks of development since Perl 5.21.1
-and contains approximately 11,000 lines of changes across 220 files from 27
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 5,700 lines of changes to 140 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.2:
-
-Aaron Crane, Abhijit Menon-Sen, Abigail, Alexandr Ciornii, brian d foy, Brian
-Fraser, Chris 'BinGOs' Williams, Craig A. Berry, Daniel Dragan, David Golden,
-David Mitchell, Dmitri Tikhonov, George Greer, H.Merijn Brand, James E Keenan,
-Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Matthew Horsfall, Peter
-John Acklam, Peter Martini, Reini Urban, Ricardo Signes, Steve Hay, Tony Cook,
-Yves Orton, Ævar Arnfjörð Bjarmason.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5213delta - what is new for perl v5.21.3
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.2 release and the 5.21.3
-release.
-
-If you are upgrading from an earlier release such as 5.21.1, first read
-L<perl5212delta>, which describes differences between 5.21.1 and 5.21.2.
-
-=head1 Core Enhancements
-
-=head2 C<defined(@array = LIST)> is no longer fatal
-
-In 5.21.1, C<defined(@array)> was made fatal. This has been relaxed
-to not die if the argument is assigning to an array.
-
-=head2 Floating point parsing has been improved
-
-Parsing and printing of floating point values has been improved.
-
-As a completely new feature, hexadecimal floating point literals
-(like 0x1.23p-4) are now supported, and they can be output with
-C<printf %a>.
-
-=head1 Security
-
-=head2 The L<Safe> module could allow outside packages to be replaced
-
-Critical bugfix: outside packages could be replaced. L<Safe> has
-been patched to 2.38 to address this.
-
-=head1 Incompatible Changes
-
-=head2 S<C<use UNIVERSAL '...'>> is now a fatal error
-
-Importing functions from C<UNIVERSAL> has been deprecated since v5.12, and
-is now a fatal error. S<C<"use UNIVERSAL">> without any arguments is still
-allowed.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<B::Debug> has been upgraded from version 1.19 to 1.21.
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.20 to 0.22.
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.141520 to 2.142060.
-
-=item *
-
-L<CPAN::Meta::Requirements> has been upgraded from version 2.125 to 2.126.
-
-=item *
-
-L<ExtUtils::CBuilder> was moved from F<dist> to F<cpan>.
-
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded from version 0.280216 to 0.280217.
-
-=item *
-
-L<ExtUtils::Install> was moved from F<dist> to F<cpan>.
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded from version 1.64 to 1.65.
-It was also moved from F<dist> to F<cpan>.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.043 to 0.047.
-
-=item *
-
-L<IPC::Open3> has been upgraded from version 1.17 to 1.18.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.021002 to 5.021003.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.27 to 1.28.
-
-=item *
-
-L<perl5db.pl> has been upgraded from version 1.45 to 1.46.
-
-=item *
-
-L<perlfaq> has been upgraded from version 5.0150044 to 5.0150045.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.41 to 1.42.
-
-=item *
-
-L<Safe> has been upgraded from version 2.37 to 2.38.
-
-=item *
-
-L<Socket> has been upgraded from version 2.014 to 2.015.
-
-=item *
-
-L<Sys::Hostname> has been upgraded from version 1.18 to 1.19
-
-=item *
-
-L<UNIVERSAL> has been upgraded from version 1.11 to 1.12.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlexperiment>
-
-=over 4
-
-=item *
-
-Added reference to L<feature>.
-
-=back
-
-=head3 L<perlguts>
-
-=over 4
-
-=item *
-
-Details on C level symbols and libperl.t added.
-
-=back
-
-=head3 L<perlhacktips>
-
-=over 4
-
-=item *
-
-Recommended replacements for tmpfile, atoi, strtol, and strtoul added.
-
-=back
-
-=head3 L<perlop>
-
-=over 4
-
-=item *
-
-ASCII v. EBCDIC clarifications added.
-
-=back
-
-=head3 L<perlsec>
-
-=over 4
-
-=item *
-
-Comments added on algorithmic complexity and tied hashes.
-
-=back
-
-=head3 L<perlvms>
-
-=over 4
-
-=item *
-
-Updated documentation on environment and shell interaction in VMS.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Hexadecimal float: internal error|perldiag/"Hexadecimal float: internal error">
-
-(F) Something went horribly bad in hexadecimal float handling.
-
-=item *
-
-L<Hexadecimal float: unsupported long double format|perldiag/"Hexadecimal float: unsupported long double format">
-
-(F) You have configured Perl to use long doubles but
-the internals of the long double format are unknown,
-therefore the hexadecimal float output is impossible.
-
-=back
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Hexadecimal float: exponent overflow|perldiag/"Hexadecimal float: exponent overflow">
-
-(W overflow) The hexadecimal floating point has larger exponent
-than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: exponent underflow|perldiag/"Hexadecimal float: exponent underflow">
-
-(W overflow) The hexadecimal floating point has smaller exponent
-than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: mantissa overflow|perldiag/"Hexadecimal float: mantissa overflow">
-
-(W overflow) The hexadecimal floating point literal had more bits in
-the mantissa (the part between the 0x and the exponent, also known as
-the fraction or the significand) than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: precision loss|perldiag/"Hexadecimal float: precision loss">
-
-(W overflow) The hexadecimal floating point had internally more
-digits than could be output. This can be caused by unsupported
-long double formats, or by 64-bit integers not being available
-(needed to retrieve the digits under some configurations).
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-C<require> with no argument or undef used to warn about a Null filename; now
-it dies with C<Missing or undefined argument to require>.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-MurmurHash64A and MurmurHash64B can now be configured as the internal hash
-function.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Android
-
-Build support has been improved for cross-compiling in general and for
-Android in particular.
-
-=item Solaris
-
-C<c99> options have been cleaned up, hints look for C<solstudio>
-as well as C<SUNWspro>, and support for native C<setenv> has been added.
-
-=item VMS
-
-C<finite>, C<finitel>, and C<isfinite> detection has been added to
-C<configure.com>, environment handling has had some minor changes, and
-a fix for legacy feature checking status.
-
-=item Windows
-
-C<%I64d> is now being used instead of C<%lld> for MinGW.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Added L<perlapi/sync_locale>.
-Changing the program's locale should be avoided by XS code. Nevertheless,
-certain non-Perl libraries called from XS, such as C<Gtk> do so. When this
-happens, Perl needs to be told that the locale has changed. Use this function
-to do so, before returning to Perl.
-
-=item *
-
-Added L<perlapi/grok_atou> as a safer replacement for atoi and strtol.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Failing to compile C<use Foo> in an eval could leave a spurious
-C<BEGIN> subroutine definition, which would produce a "Subroutine
-BEGIN redefined" warning on the next use of C<use>, or other C<BEGIN>
-block. [perl #122107]
-
-=item *
-
-C<method { BLOCK } ARGS> syntax now correctly parses the arguments if they
-begin with an opening brace. [perl #46947]
-
-=item *
-
-External libraries and Perl may have different ideas of what the locale is.
-This is problematic when parsing version strings if the locale's numeric
-separator has been changed. Version parsing has been patched to ensure
-it handles the locales correctly. [perl #121930]
-
-=item *
-
-A bug has been fixed where zero-length assertions and code blocks inside of a
-regex could cause C<pos> to see an incorrect value. [perl #122460]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.3 represents approximately 4 weeks of development since Perl 5.21.2
-and contains approximately 21,000 lines of changes across 250 files from 25
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 18,000 lines of changes to 160 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.3:
-
-Aaron Crane, Abigail, Alberto Simões, Andy Dougherty, Brian Fraser, Chad
-Granum, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker,
-Daniel Dragan, David Mitchell, Father Chrysostomos, H.Merijn Brand, James E
-Keenan, Jan Dubois, Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Lukas
-Mai, Peter Martini, Rafael Garcia-Suarez, syber, Tony Cook, Vladimir Marek,
-Yves Orton.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5214delta - what is new for perl v5.21.4
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.3 release and the 5.21.4
-release.
-
-If you are upgrading from an earlier release such as 5.21.2, first read
-L<perl5213delta>, which describes differences between 5.21.2 and 5.21.3.
-
-=head1 Core Enhancements
-
-=head2 Infinity and NaN (not-a-number) handling improved
-
-Floating point values are able to hold the special values infinity (also
--infinity), and NaN (not-a-number). Now we more robustly recognize and
-propagate the value in computations, and on output normalize them to C<Inf> and
-C<NaN>.
-
-See also the L<POSIX> enhancements.
-
-=head1 Security
-
-=head2 Perl is now compiled with -fstack-protector-strong if available
-
-Perl has been compiled with the anti-stack-smashing option
-C<-fstack-protector> since 5.10.1. Now Perl uses the newer variant
-called C<-fstack-protector-strong>, if available.
-
-=head1 Incompatible Changes
-
-=head2 Changes to the C<*> prototype
-
-The C<*> character in a subroutine's prototype used to allow barewords to take
-precedence over most, but not all subroutines. It was never consistent and
-exhibited buggy behaviour.
-
-Now it has been changed, so subroutines always take precedence over barewords,
-which brings it into conformity with similarly prototyped built-in functions:
-
- sub splat(*) { ... }
- sub foo { ... }
- splat(foo); # now always splat(foo())
- splat(bar); # still splat('bar') as before
- close(foo); # close(foo())
- close(bar); # close('bar')
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Subroutines with an empty prototype and bodies containing just C<undef> are now
-eligible for inlining.
-L<[perl #122728]|https://rt.perl.org/Ticket/Display.html?id=122728>
-
-=item *
-
-Subroutines in packages no longer need to carry typeglobs around with them.
-Declaring a subroutine will now put a simple sub reference in the stash if
-possible, saving memory. The typeglobs still notionally exist, so accessing
-them will cause the subroutine reference to be upgraded to a typeglob. This
-optimization does not currently apply to XSUBs or exported subroutines, and
-method calls will undo it, since they cache things in typeglobs.
-L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<B::Op_private> provides detailed information about the flags used in the
-C<op_private> field of perl opcodes.
-
-=back
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.00 to 2.02.
-
-Tests can now be run in parallel.
-
-=item *
-
-L<Attribute::Handlers> has been upgraded from version 0.96 to 0.97.
-
-Internal changes to account for the fact that subroutines in packages no longer
-need to carry typeglobs around with them (see under L</Performance
-Enhancements>).
-
-=item *
-
-L<attributes> has been upgraded from version 0.22 to 0.23.
-
-The usage of C<memEQs> in the XS has been corrected.
-L<[perl #122701]|https://rt.perl.org/Ticket/Display.html?id=122701>
-
-=item *
-
-L<B> has been upgraded from version 1.50 to 1.51.
-
-It provides a new C<B::safename> function, based on the existing
-C<< B::GV->SAFENAME >>, that converts "\cOPEN" to "^OPEN".
-
-=item *
-
-L<B::Concise> has been upgraded from version 0.992 to 0.993.
-
-Internal changes to account for the fact that the defines and labels for the
-flags in the C<op_private> field of OPs are now auto-generated (see under
-L</Internal Changes>).
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.27 to 1.28.
-
-It now deparses C<our(I<LIST>)> and typed lexical (C<my Dog $spot>) correctly.
-
-=item *
-
-L<bignum> has been upgraded from version 0.37 to 0.38.
-
-An C<eval BLOCK> rather than an C<eval EXPR> is now used to see if we can find
-Math::BigInt::Lite.
-
-=item *
-
-L<constant> has been upgraded from version 1.31 to 1.32.
-
-It now accepts fully-qualified constant names, allowing constants to be defined
-in packages other than the caller.
-
-=item *
-
-L<CPAN::Meta::Requirements> has been upgraded from version 2.126 to 2.128.
-
-Works around limitations in version::vpp detecting v-string magic and adds
-support for forthcoming L<ExtUtils::MakeMaker> bootstrap F<version.pm> for
-Perls older than 5.10.0.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.152 to 2.154.
-
-Fixes CVE-2014-4330 by adding a configuration variable/option to limit
-recursion when dumping deep data structures.
-
-=item *
-
-L<experimental> has been upgraded from version 0.008 to 0.010.
-
-Hardcodes features for Perls older than 5.15.7.
-
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded from version 0.280217 to 0.280219.
-
-Fixes a regression on Android.
-L<[perl #122675]|https://rt.perl.org/Ticket/Display.html?id=122675>
-
-=item *
-
-L<ExtUtils::Install> has been upgraded from version 1.68 to 2.04.
-
-No changes to installed files other than version bumps.
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded from version 1.65 to 1.68.
-
-Fixes a bug with C<maniread()>'s handling of quoted filenames and improves
-C<manifind()> to follow symlinks.
-L<[perl #122415]|https://rt.perl.org/Ticket/Display.html?id=122415>
-
-=item *
-
-L<File::Find> has been upgraded from version 1.27 to 1.28.
-
-C<find()> and C<finddepth()> will now warn if passed inappropriate or
-misspelled options.
-
-=item *
-
-L<Getopt::Std> has been upgraded from version 1.10 to 1.11.
-
-Corrects a typo in the documentation.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.047 to 0.049.
-
-C<keep_alive> is now fork-safe and thread-safe.
-
-=item *
-
-L<IO> has been upgraded from version 1.33 to 1.34.
-
-The XS implementation has been fixed for the sake of older Perls.
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.31 to 0.32.
-
-Implements Timeout for C<connect()>.
-L<[cpan #92075]|https://rt.cpan.org/Ticket/Display.html?id=92075>
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.31 to 3.32.
-
-New codes have been added.
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.9996 to 1.9997.
-
-The documentation now gives test examples using L<Test::More> rather than
-L<Test>.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.021003 to 5.20140920.
-
-Updated to cover the latest releases of Perl.
-
-=item *
-
-L<overload> has been upgraded from version 1.22 to 1.23.
-
-A redundant C<ref $sub> check has been removed.
-
-=item *
-
-PathTools has been upgraded from version 3.49 to 3.50.
-
-A warning from the B<gcc> compiler is now avoided when building the XS.
-
-=item *
-
-L<Pod::Perldoc> has been upgraded from version 3.23 to 3.24.
-
-Filehandles opened for reading or writing now have C<:encoding(UTF-8)> set.
-L<[cpan #98019]|https://rt.cpan.org/Ticket/Display.html?id=98019>
-
-=item *
-
-L<POSIX> has been upgraded from version 1.42 to 1.43.
-
-The C99 math functions and constants (for example acosh, isinf, isnan, round,
-trunc; M_E, M_SQRT2, M_PI) have been added.
-
-=item *
-
-Scalar-List-Utils has been upgraded from version 1.39 to 1.41.
-
-A new module, L<Sub::Util>, has been added, containing functions related to
-CODE refs, including C<subname> (inspired by Sub::Identity) and C<set_subname>
-(copied and renamed from Sub::Name).
-
-The use of C<GetMagic> in C<List::Util::reduce()> has also been fixed.
-L<[cpan #63211]|https://rt.cpan.org/Ticket/Display.html?id=63211>
-
-=item *
-
-L<Term::ReadLine> has been upgraded from version 1.14 to 1.15.
-
-Faster checks are now made first in some if-statements.
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.32 to 3.33.
-
-Various documentation fixes.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.001003 to 1.001006.
-
-Various documentation fixes.
-
-=item *
-
-L<threads> has been upgraded from version 1.95 to 1.96.
-
-No changes to installed files other than version bumps.
-
-=item *
-
-L<Time::Piece> has been upgraded from version 1.27 to 1.29.
-
-When pretty printing negative Time::Seconds, the "minus" is no longer lost.
-
-=item *
-
-L<version> has been upgraded from version 0.9908 to 0.9909.
-
-Numerous changes. See the F<Changes> file in the CPAN distribution for
-details.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-Calling C<delete> or C<exists> on array values is now described as "strongly
-discouraged" rather than "deprecated".
-
-=back
-
-=head3 L<perlpolicy>
-
-=over 4
-
-=item *
-
-The conditions for marking an experimental feature as non-experimental are now
-set out.
-
-=back
-
-=head3 L<perlrecharclass>
-
-=over 4
-
-=item *
-
-The documentation of Bracketed Character Classes has been expanded to cover the
-improvements in C<qr/[\N{named sequence}]/> (see under L</Selected Bug Fixes>).
-
-=back
-
-=head3 L<perlsyn>
-
-=over 4
-
-=item *
-
-An ambiguity in the documentation of the Ellipsis statement has been corrected.
-L<[perl #122661]|https://rt.perl.org/Ticket/Display.html?id=122661>
-
-=back
-
-=head3 L<perlxs>
-
-=over 4
-
-=item *
-
-Added a discussion of locale issues in XS code.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Character in 'C' format overflow in pack|perldiag/"Character in 'C' format overflow in pack">
-
-(W pack) You tried converting an infinity or not-a-number to an unsigned
-character, which makes no sense. Perl behaved as if you tried to pack 0xFF.
-
-=item *
-
-L<Character in 'c' format overflow in pack|perldiag/"Character in 'c' format overflow in pack">
-
-(W pack) You tried converting an infinity or not-a-number to a signed
-character, which makes no sense. Perl behaved as if you tried to pack 0xFF.
-
-=item *
-
-L<Invalid number (%f) in chr|perldiag/"Invalid number (%f) in chr">
-
-(W utf8) You passed an invalid number (like an infinity or not-a-number) to
-C<chr>. Those are not valid character numbers, so it returned the Unicode
-replacement character (U+FFFD).
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-L<Global symbol "%s" requires explicit package name|perldiag/"Global symbol "%s" requires explicit package name (did you forget to declare "my %s"?)">
-
-This message has had '(did you forget to declare "my %s"?)' appended to it, to
-make it more helpful to new Perl programmers.
-L<[perl #121638]|https://rt.perl.org/Ticket/Display.html?id=121638>
-
-=item *
-
-L<\N{} in character class restricted to one character in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"\N{} in inverted character class or as a range end-point is restricted to one character in regex; marked by S<<-- HERE> in m/%s/">
-
-This message has had 'character class' changed to 'inverted character class or
-as a range end-point is' to reflect improvements in C<qr/[\N{named sequence}]/>
-(see under L</Selected Bug Fixes>).
-
-=item *
-
-L<panic: frexp|perldiag/"panic: frexp: %f">
-
-This message has had ': %f' appended to it, to show what the offending floating
-point number is.
-
-=back
-
-=head2 Diagnostic Removals
-
-=over 4
-
-=item *
-
-"Constant is not a FOO reference"
-
-Compile-time checking of constant dereferencing (e.g., C<< my_constant->() >>)
-has been removed, since it was not taking overloading into account.
-L<[perl #69456]|https://rt.perl.org/Ticket/Display.html?id=69456>
-L<[perl #122607]|https://rt.perl.org/Ticket/Display.html?id=122607>
-
-=item *
-
-"Ambiguous use of -foo resolved as -&foo()"
-
-There is actually no ambiguity here, and this impedes the use of negated
-constants; e.g., C<-Inf>.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-For long doubles (to get more precision and range for floating point numbers)
-one can now use the GCC quadmath library which implements the quadruple
-precision floating point numbers in x86 and ia64 platforms. See F<INSTALL> for
-details.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-A new test script, F<op/infnan.t>, has been added to test if Inf and NaN are
-working correctly. See L</Infinity and NaN (not-a-number) handling improved>.
-
-=item *
-
-A new test script, F<re/rt122747.t>, has been added to test that the fix for
-L<perl #122747|https://rt.perl.org/Ticket/Display.html?id=122747> is working.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-C<save_re_context> no longer does anything and has been moved to F<mathoms.c>.
-
-=item *
-
-C<cv_name> is a new API function that can be passed a CV or GV. It returns an
-SV containing the name of the subroutine for use in diagnostics.
-L<[perl #116735]|https://rt.perl.org/Ticket/Display.html?id=116735>
-L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
-
-=item *
-
-C<cv_set_call_checker_flags> is a new API function that works like
-C<cv_set_call_checker>, except that it allows the caller to specify whether the
-call checker requires a full GV for reporting the subroutine's name, or whether
-it could be passed a CV instead. Whatever value is passed will be acceptable
-to C<cv_name>. C<cv_set_call_checker> guarantees there will be a GV, but it
-may have to create one on the fly, which is inefficient.
-L<[perl #116735]|https://rt.perl.org/Ticket/Display.html?id=116735>
-
-=item *
-
-C<CvGV> (which is not part of the API) is now a more complex macro, which may
-call a function and reify a GV. For those cases where is has been used as a
-boolean, C<CvHASGV> has been added, which will return true for CVs that
-notionally have GVs, but without reifying the GV. C<CvGV> also returns a GV
-now for lexical subs.
-L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
-
-=item *
-
-Added L<perlapi/sync_locale>. Changing the program's locale should be avoided
-by XS code. Nevertheless, certain non-Perl libraries called from XS, such as
-C<Gtk> do so. When this happens, Perl needs to be told that the locale has
-changed. Use this function to do so, before returning to Perl.
-
-=item *
-
-The defines and labels for the flags in the C<op_private> field of OPs are now
-auto-generated from data in F<regen/op_private>. The noticeable effect of this
-is that some of the flag output of C<Concise> might differ slightly, and the
-flag output of C<perl -Dx> may differ considerably (they both use the same set
-of labels now). Also in debugging builds, there is a new assert in
-C<op_free()> that checks that the op doesn't have any unrecognized flags set in
-C<op_private>.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Constant dereferencing now works correctly for typeglob constants. Previously
-the glob was stringified and its name looked up. Now the glob itself is used.
-L<[perl #69456]|https://rt.perl.org/Ticket/Display.html?id=69456>
-
-=item *
-
-When parsing a funny character ($ @ % &) followed by braces, the parser no
-longer tries to guess whether it is a block or a hash constructor (causing a
-syntax error when it guesses the latter), since it can only be a block.
-
-=item *
-
-C<undef $reference> now frees the referent immediately, instead of hanging on
-to it until the next statement.
-L<[perl #122556]|https://rt.perl.org/Ticket/Display.html?id=122556>
-
-=item *
-
-Various cases where the name of a sub is used (autoload, overloading, error
-messages) used to crash for lexical subs, but have been fixed.
-
-=item *
-
-Bareword lookup now tries to avoid vivifying packages if it turns out the
-bareword is not going to be a subroutine name.
-
-=item *
-
-Compilation of anonymous constants (e.g., C<sub () { 3 }>) no longer deletes
-any subroutine named C<__ANON__> in the current package. Not only was
-C<*__ANON__{CODE}> cleared, but there was a memory leak, too. This bug goes
-back to Perl 5.8.0.
-
-=item *
-
-Stub declarations like C<sub f;> and C<sub f ();> no longer wipe out constants
-of the same name declared by C<use constant>. This bug was introduced in Perl
-5.10.0.
-
-=item *
-
-Under some conditions a warning raised in compilation of regular expression
-patterns could be displayed multiple times. This is now fixed.
-
-=item *
-
-C<qr/[\N{named sequence}]/> now works properly in many instances. Some names
-known to C<\N{...}> refer to a sequence of multiple characters, instead of the
-usual single character. Bracketed character classes generally only match
-single characters, but now special handling has been added so that they can
-match named sequences, but not if the class is inverted or the sequence is
-specified as the beginning or end of a range. In these cases, the only
-behavior change from before is a slight rewording of the fatal error message
-given when this class is part of a C<?[...])> construct. When the C<[...]>
-stands alone, the same non-fatal warning as before is raised, and only the
-first character in the sequence is used, again just as before.
-
-=item *
-
-Tainted constants evaluated at compile time no longer cause unrelated
-statements to become tainted.
-L<[perl #122669]|https://rt.perl.org/Ticket/Display.html?id=122669>
-
-=item *
-
-C<open $$fh, ...>, which vivifies a handle with a name like "main::_GEN_0", was
-not giving the handle the right reference count, so a double free could happen.
-
-=item *
-
-When deciding that a bareword was a method name, the parser would get confused
-if an "our" sub with the same name existed, and look up the method in the
-package of the "our" sub, instead of the package of the invocant.
-
-=item *
-
-The parser no longer gets confused by C<\U=> within a double-quoted string. It
-used to produce a syntax error, but now compiles it correctly.
-L<[perl #80368]|https://rt.perl.org/Ticket/Display.html?id=80368>
-
-=item *
-
-It has always been the intention for the C<-B> and C<-T> file test operators to
-treat UTF-8 encoded files as text. (L<perlfunc|perlfunc/-X FILEHANDLE> has
-been updated to say this.) Previously, it was possible for some files to be
-considered UTF-8 that actually weren't valid UTF-8. This is now fixed. The
-operators now work on EBCDIC platforms as well.
-
-=item *
-
-Under some conditions warning messages raised during regular expression pattern
-compilation were being output more than once. This has now been fixed.
-
-=item *
-
-A regression has been fixed that was introduced in Perl 5.20.0 (fixed in Perl
-5.20.1 as well as here) in which a UTF-8 encoded regular expression pattern
-that contains a single ASCII lowercase letter does not match its uppercase
-counterpart.
-L<[perl #122655]|https://rt.perl.org/Ticket/Display.html?id=122655>
-
-=item *
-
-Constant folding could incorrectly suppress warnings if lexical warnings (C<use
-warnings> or C<no warnings>) were not in effect and C<$^W> were false at
-compile time and true at run time.
-
-=item *
-
-Loading UTF8 tables during a regular expression match could cause assertion
-failures under debugging builds if the previous match used the very same
-regular expression.
-L<[perl #122747]|https://rt.perl.org/Ticket/Display.html?id=122747>
-
-=item *
-
-Thread cloning used to work incorrectly for lexical subs, possibly causing
-crashes or double frees on exit.
-
-=item *
-
-Since Perl 5.14.0, deleting C<$SomePackage::{__ANON__}> and then undefining an
-anonymous subroutine could corrupt things internally, resulting in
-L<Devel::Peek> crashing or L<B.pm|B> giving nonsensical data. This has been
-fixed.
-
-=item *
-
-C<(caller $n)[3]> now reports names of lexical subs, instead of treating them
-as "(unknown)".
-
-=item *
-
-C<sort subname LIST> now supports lexical subs for the comparison routine.
-
-=item *
-
-Aliasing (e.g., via C<*x = *y>) could confuse list assignments that mention the
-two names for the same variable on either side, causing wrong values to be
-assigned.
-L<[perl #15667]|https://rt.perl.org/Ticket/Display.html?id=15667>
-
-=item *
-
-Long here-doc terminators could cause a bad read on short lines of input. This
-has been fixed. It is doubtful that any crash could have occurred. This bug
-goes back to when here-docs were introduced in Perl 3.000 twenty-five years
-ago.
-
-=item *
-
-An optimization in C<split> to treat C<split/^/> like C<split/^/m> had the
-unfortunate side-effect of also treating C<split/\A/> like C<split/^/m>, which
-it should not. This has been fixed. (Note, however, that C<split/^x/> does
-not behave like C<split/^x/m>, which is also considered to be a bug and will be
-fixed in a future version.)
-L<[perl #122761]|https://rt.perl.org/Ticket/Display.html?id=122761>
-
-=item *
-
-The little-known C<my Class $var> syntax (see L<fields> and L<attributes>)
-could get confused in the scope of C<use utf8> if C<Class> were a constant
-whose value contained Latin-1 characters.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.4 represents approximately 4 weeks of development since Perl 5.21.3
-and contains approximately 29,000 lines of changes across 520 files from 30
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 15,000 lines of changes to 390 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed
-the improvements that became Perl 5.21.4:
-
-Alberto Simões, Alexandre (Midnite) Jousset, Andy Dougherty, Anthony Heading,
-Brian Fraser, Chris 'BinGOs' Williams, Craig A. Berry, Daniel Dragan, David
-Mitchell, Doug Bell, Father Chrysostomos, George Greer, H.Merijn Brand, James E
-Keenan, Jarkko Hietaniemi, Jerry D. Hedden, Karen Etheridge, Karl Williamson,
-Olivier Mengué, Peter Martini, Reini Urban, Ricardo Signes, Steffen Müller,
-Steve Hay, Sullivan Beck, syber, Tadeusz Sośnierz, Tony Cook, Yves Orton,
-Ævar Arnfjörð Bjarmason.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5215delta - what is new for perl v5.21.5
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.4 release and the 5.21.5
-release.
-
-If you are upgrading from an earlier release such as 5.21.3, first read
-L<perl5214delta>, which describes differences between 5.21.3 and 5.21.4.
-
-=head1 Core Enhancements
-
-=head2 New double-diamond operator
-
-C<<< <<>> >>> is like C<< <> >> but uses three-argument C<open> to open
-each file in @ARGV. So each element of @ARGV is an actual file name, and
-"|foo" won't be treated as a pipe open.
-
-=head2 Aliasing via reference
-
-Variables and subroutines can now be aliased by assigning to a reference:
-
- \$c = \$d;
- \&x = \&y;
-
-Or by using a backslash before a C<foreach> iterator variable, which is
-perhaps the most useful idiom this feature provides:
-
- foreach \%hash (@array_of_hash_refs) { ... }
-
-This feature is experimental and must be enabled via C<use feature
-'refaliasing'>. It will warn unless the C<experimental::refaliasing>
-warnings category is disabled.
-
-See L<perlref/Assigning to References>
-
-=head2 Perl now supports POSIX 2008 locale currency additions.
-
-On platforms that are able to handle POSIX.1-2008, the
-hash returned by
-L<C<POSIX::localeconv()>|perllocale/The localeconv function>
-includes the international currency fields added by that version of the
-POSIX standard. These are
-C<int_n_cs_precedes>,
-C<int_n_sep_by_space>,
-C<int_n_sign_posn>,
-C<int_p_cs_precedes>,
-C<int_p_sep_by_space>,
-and
-C<int_p_sign_posn>.
-
-=head2 Packing infinity or not-a-number into a character is now fatal
-
-Before, when trying to pack infinity or not-a-number into a
-(signed) character, Perl would warn, and assumed you tried to
-pack C<< 0xFF >>; if you gave it as an argument to C<< chr >>,
-C<< U+FFFD >> was returned.
-
-But now, all such actions (C<< pack >>, C<< chr >>, and C<< print '%c' >>)
-result in a fatal error.
-
-=head2 Inf and NaN
-
-Many small improvements, bug fixes and added test cases for dealing
-with math related to infinity and not-a-number.
-
-=head1 Security
-
-=head2 Perl is now compiled with -fstack-protector-strong if available
-
-Perl has been compiled with the anti-stack-smashing option
-C<-fstack-protector> since 5.10.1. Now Perl uses the newer variant
-called C<-fstack-protector-strong>, if available. (This was added
-already in 5.21.4.)
-
-=head1 Deprecations
-
-=head2 Use of multiple /x regexp modifiers
-
-It is now deprecated to say something like any of the following:
-
- qr/foo/xx;
- /(?xax:foo)/;
- use re qw(/amxx);
-
-That is, now C<x> should only occur once in any string of contiguous
-regular expression pattern modifiers. We do not believe there are any
-occurrences of this in all of CPAN. This is in preparation for a future
-Perl release having C</xx> mean to allow white-space for readability in
-bracketed character classes (those enclosed in square brackets:
-C<[...]>).
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-C<length> is up to 20% faster for non-magical/non-tied scalars containing a
-string if it is a non-utf8 string or if C<use bytes;> is in scope.
-
-=item *
-
-Non-magical/non-tied scalars that contain only a floating point value and are
-on most Perl builds with 64 bit integers now use 8-32 less bytes of memory
-depending on OS.
-
-=item *
-
-In C<@array = split>, the assignment can be optimized away with C<split>
-writing directly to the array. This optimisation was happening only for
-package arrays other than @_ and only
-sometimes. Now this optimisation happens
-almost all the time.
-
-=item *
-
-C<join> is now subject to constant folding. Moreover, C<join> with a
-scalar or constant for the separator and a single-item list to join is
-simplified to a stringification. The separator doesn't even get evaluated.
-
-=item *
-
-C<qq(@array)> is implemented using two ops: a stringify op and a join op.
-If the qq contains nothing but a single array, the stringification is
-optimized away.
-
-=item *
-
-C<our $var> and C<our($s,@a,%h)> in void context are no longer evaluated at
-run time. Even a whole sequence of C<our $foo;> statements will simply be
-skipped over. The same applies to C<state> variables.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<attributes> has been upgraded from version 0.23 to 0.24.
-
-Avoid reading beyond the end of a buffer. [perl #122629]
-
-=item *
-
-L<B> has been upgraded from version 1.51 to 1.52.
-
-=item *
-
-L<B::Concise> has been upgraded from version 0.993 to 0.994.
-
-Null ops that are part of the execution chain are now given sequence
-numbers.
-
-Private flags for nulled ops are now dumped with mnemonics as they would be
-for the non-nulled counterparts.
-
-L<B::Deparse> has been upgraded from version 1.28 to 1.29.
-
-Parenthesised arrays in lists passed to C<\> are now correctly deparsed
-with parentheses (e.g., C<\(@a, (@b), @c)> now retains the parentheses
-around @b), this preserving the flattening behaviour of referenced
-parenthesised arrays. Formerly, it only worked for one array: C<\(@a)>.
-
-C<local our> is now deparsed correctly, with the C<our> included.
-
-C<for($foo; !$bar; $baz) {...}> was deparsed without the C<!> (or C<not>).
-This has been fixed.
-
-Core keywords that conflict with lexical subroutines are now deparsed with
-the C<CORE::> prefix.
-
-C<foreach state $x (...) {...}> now deparses correctly with C<state> and
-not C<my>.
-
-C<our @array = split(...)> now deparses correctly with C<our> in those
-cases where the assignment is optimized away.
-
-=item *
-
-L<B::Debug> has been upgraded from version 1.21 to 1.22.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.28 to 1.29.
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.064 to 2.066.
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.065 to 2.066.
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.142060 to 2.142690.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.26 to 1.27.
-
-Remove dl_nonlazy global if unused in Dynaloader. [perl #122926]
-
-=item *
-
-L<Errno> has been upgraded from version 1.20_04 to 1.21.
-
-=item *
-
-L<experimental> has been upgraded from version 0.010 to 0.012.
-
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded from version 0.280219 to 0.280220.
-
-=item *
-
-L<ExtUtils::Miniperl> has been upgraded from version 1.02 to 1.03.
-
-=item *
-
-L<Fcntl> has been upgraded from version 1.11 to 1.13.
-
-Add support for the Linux pipe buffer size fcntl() commands.
-
-=item *
-
-L<feature> has been upgraded from version 1.37 to 1.38.
-
-=item *
-
-L<File::Find> has been upgraded from version 1.28 to 1.29.
-
-Slightly faster module loading time.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.50 to 3.51.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.049 to 0.050.
-
-=item *
-
-The IO-Compress set of modules has been upgraded from version 2.064 to 2.066.
-
-=item *
-
-L<JSON::PP> has been upgraded from version 2.27203 to 2.27300.
-
-=item *
-
-The libnet collection of modules has been upgraded from version 1.27 to 3.02.
-
-Support for IPv6 and SSL to Net::FTP, Net::NNTP, Net::POP3 and Net::SMTP.
-
-Improvements in Net::SMTP authentication.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20140920 to 5.20141020.
-
-Updated to cover the latest releases of Perl.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.28 to 1.29.
-
-=item *
-
-The PathTools module collection has been upgraded from version 3.50 to 3.51.
-
-Slightly faster module loading time.
-
-=item *
-
-L<perlfaq> has been upgraded from version 5.0150045 to version 5.0150046.
-[perl #123008]
-
-=item *
-
-L<POSIX> has been upgraded from version 1.43 to 1.45.
-
-POSIX::tmpnam() now produces a deprecation warning. [perl #122005]
-
-=item *
-
-L<re> has been upgraded from version 0.26 to 0.27.
-
-=item *
-
-L<Socket> has been upgraded from version 2.015 to 2.016.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.001006 to 1.001008.
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.46 to 1.47.
-
-=item *
-
-L<warnings> has been upgraded from version 1.26 to 1.28.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.17 to 0.18.
-
-Allow XSLoader to load modules from a different namespace.
-[perl #122455]
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlrecharclass>
-
-=over 4
-
-=item *
-
-Clarifications have been added to L<perlrecharclass/Character Ranges>
-to the effect that Perl guarantees that C<[A-Z]>, C<[a-z]>, C<[0-9]> and
-any subranges thereof in regular expression bracketed character classes
-are guaranteed to match exactly what a naive English speaker would
-expect them to match, even on platforms (such as EBCDIC) where special
-handling is required to accomplish this.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Cannot chr %f|perldiag/"Cannot chr %f">
-
-=item *
-
-L<Cannot compress %f in pack|perldiag/"Cannot compress %f in pack">
-
-=item *
-
-L<Cannot pack %f with '%c'|perldiag/"Cannot pack %f with '%c'">
-
-=item *
-
-L<Cannot print %f with '%c'|perldiag/"Cannot printf %f with '%c'">
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-'"my" variable &foo::bar can't be in a package' has been reworded to say
-'subroutine' instead of 'variable'.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-Some regular expression tests are written in such a way that they will
-run very slowly if certain optimizations break. These tests have been
-moved into new files, F<< t/re/speed.t >> and F<< t/re/speed_thr.t >>,
-and are run with a C<< watchdog() >>.
-
-=back
-
-=head1 Platform Support
-
-=head2 Regained Platforms
-
-IRIX and Tru64 platforms are working again.
-(Some C<make test> failures remain.)
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item EBCDIC
-
-Special handling is required on EBCDIC platforms to get C<qr/[i-j]/> to
-match only C<"i"> and C<"j">, since there are 7 characters between the
-code points for C<"i"> and C<"j">. This special handling had only been
-invoked when both ends of the range are literals. Now it is also
-invoked if any of the C<\N{...}> forms for specifying a character by
-name or Unicode code point is used instead of a literal. See
-L<perlrecharclass/Character Ranges>.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-SVs of type SVt_NV are now bodyless when a build configure and platform allow
-it, specifically C<sizeof(NV) <= sizeof(IV)>. The bodyless trick is the same one
-as for IVs since 5.9.2, but for NVs, unlike IVs, is not guaranteed on all
-platforms and build configurations.
-
-=item *
-
-The C<$DB::single>, C<$DB::signal> and C<$DB::trace> now have set and
-get magic that stores their values as IVs and those IVs are used when
-testing their values in C<pp_dbstate>. This prevents perl from
-recursing infinity if an overloaded object is assigned to any of those
-variables. [perl #122445]
-
-=item *
-
-C<Perl_tmps_grow> which is marked as public API but undocumented has been
-removed from public API. If you use C<EXTEND_MORTAL> macro in your XS code to
-preextend the mortal stack, you are unaffected by this change.
-
-=item *
-
-C<cv_name>, which was introduced in 5.21.4, has been changed incompatibly.
-It now has a flags field that allows the caller to specify whether the name
-should be fully qualified. See L<perlapi/cv_name>.
-
-=item *
-
-Internally Perl no longer uses the C<SVs_PADMY> flag. C<SvPADMY()> now
-returns a true value for anything not marked PADTMP. C<SVs_PADMY> is now
-defined as 0.
-
-=item *
-
-The macros SETsv and SETsvUN have been removed. They were no longer used
-in the core since commit 6f1401dc2a, and have not been found present on
-CPAN.
-
-=item *
-
-The C<< SvFAKE >> bit (unused on HVs) got informally reserved by
-David Mitchell for future work on vtables.
-
-=item *
-
-The C<sv_catpvn_flags> function accepts C<SV_CATBYTES> and C<SV_CATUTF8>
-flags, which specify whether the appended string is bytes or utf8,
-respectively.
-
-=item *
-
-A new opcode class, C<< METHOP >> has been introduced, which holds
-class/method related info needed at runtime to improve performance
-of class/object method calls.
-
-C<< OP_METHOD >> and C<< OP_METHOD_NAMED >> are moved from being
-C<< UNOP/SVOP >> to being C<< METHOP >>.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Locking and unlocking values via L<Hash::Util> or C<Internals::SvREADONLY>
-no longer has any effect on values that are read-only to begin.
-Previously, unlocking such values could result in crashes, hangs or
-other erratic behaviour.
-
-=item *
-
-The internal C<looks_like_number> function (which L<Scalar::Util> provides
-access to) began erroneously to return true for "-e1" in 5.21.4, affecting
-also C<-'-e1'>. This has been fixed.
-
-=item *
-
-The flip-flop operator (C<..> in scalar context) would return the same
-scalar each time, unless the containing subroutine was called recursively.
-Now it always returns a new scalar. [perl #122829]
-
-=item *
-
-Some unterminated C<(?(...)...)> constructs in regular expressions would
-either crash or give erroneous error messages. C</(?(1)/> is one such
-example.
-
-=item *
-
-C<pack "w", $tied> no longer calls FETCH twice.
-
-=item *
-
-List assignments like C<($x, $z) = (1, $y)> now work correctly if $x and $y
-have been aliased by C<foreach>.
-
-=item *
-
-Some patterns including code blocks with syntax errors, such as
-C</ (?{(^{})/>, would hang or fail assertions on debugging builds. Now
-they produce errors.
-
-=item *
-
-An assertion failure when parsing C<sort> with debugging enabled has been
-fixed. [perl #122771]
-
-=item *
-
-C<*a = *b; @a = split //, $b[1]> could do a bad read and produce junk
-results.
-
-=item *
-
-In C<() = @array = split>, the C<() => at the beginning no longer confuses
-the optimizer, making it assume a limit of 1.
-
-=item *
-
-Fatal warnings no longer prevent the output of syntax errors.
-[perl #122966]
-
-=item *
-
-Fixed a NaN double to long double conversion error on VMS. For quiet NaNs
-(and only on Itanium, not Alpha) negative infinity instead of NaN was
-produced.
-
-=item *
-
-Fixed the issue that caused C<< make distclean >> to leave files behind
-that shouldn't. [perl #122820]
-
-=item *
-
-AIX now sets the length in C<< getsockopt >> correctly. [perl #120835],
-[rt #91183], [rt #85570].
-
-=item *
-
-During the pattern optimization phase, we no longer recurse into
-GOSUB/GOSTART when not SCF_DO_SUBSTR. This prevents the optimizer
-to run "forever" and exhaust all memory. [perl #122283]
-
-=item *
-
-F<< t/op/crypt.t >> now performs SHA-256 algorithm if the default one
-is disabled. [perl #121591]
-
-=item *
-
-Fixed an off-by-one error when setting the size of shared array.
-[perl #122950]
-
-=item *
-
-Fixed a bug that could cause perl to execute an infinite loop during
-compilation. [perl #122995]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.5 represents approximately 4 weeks of development since Perl 5.21.4
-and contains approximately 40,000 lines of changes across 530 files from 33
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 29,000 lines of changes to 390 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.5:
-
-Aaron Crane, Abigail, Alberto Simões, Andrew Fresh, Chris 'BinGOs' Williams,
-Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, David Mitchell, Doug
-Bell, Ed J, Father Chrysostomos, George Greer, Graham Knop, James E Keenan,
-Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Leon Timmermans, Lukas
-Mai, Niko Tyni, Peter Martini, Petr Písař, Rafael Garcia-Suarez, Reini Urban,
-Ricardo Signes, Shlomi Fish, Steve Hay, syber, Tony Cook, Vincent Pit, Yves
-Orton, Ævar Arnfjörð Bjarmason.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5216delta - what is new for perl v5.21.6
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.5 release and the 5.21.6
-release.
-
-If you are upgrading from an earlier release such as 5.21.4, first read
-L<perl5215delta>, which describes differences between 5.21.4 and 5.21.5.
-
-=head1 Core Enhancements
-
-=head2 List form of pipe open implemented for Win32
-
-The list form of pipe:
-
- open my $fh, "-|", "program", @arguments;
-
-is now implemented on Win32. It has the same limitations as C<system
-LIST> on Win32, since the Win32 API doesn't accept program arguments
-as a list.
-
-=head2 Assignment to list repetition
-
-C<(...) x ...> can now be used within a list that is assigned to, as long
-as the left-hand side is a valid lvalue. This allows C<(undef,undef,$foo)
-= that_function()> to be written as C<((undef)x2, $foo) = that_function()>.
-
-=head2 C<close> now sets C<$!>
-
-When an I/O error occurs, the fact that there has been an error is recorded
-in the handle. C<close> returns false for such a handle. Previously, the
-value of C<$!> would be untouched by C<close>, so the common convention of
-writing C<close $fh or die $!> did not work reliably. Now the handle
-records the value of C<$!>, too, and C<close> restores it.
-
-=head1 Deprecations
-
-=head2 Use of non-graphic characters in single-character variable names
-
-The syntax for single-character variable names is more lenient than
-for longer variable names, allowing the one-character name to be a
-punctuation character or even invisible (a non-graphic). Perl v5.20
-deprecated the ASCII-range controls as such a name. Now, all
-non-graphic characters that formerly were allowed are deprecated.
-The practical effect of this occurs only when not under C<S<"use
-utf8">>, and affects just the C1 controls (code points 0x80 through
-0xFF), NO-BREAK SPACE, and SOFT HYPHEN.
-
-=head2 Inlining of C<sub () { $var }> with observable side-effects
-
-In many cases Perl makes sub () { $var } into an inlinable constant
-subroutine, capturing the value of $var at the time the C<sub> expression
-is evaluated. This can break the closure behaviour in those cases where
-$var is subsequently modified. The subroutine won't return the new value.
-
-This usage is now deprecated in those cases where the variable could be
-modified elsewhere. Perl detects those cases and emits a deprecation
-warning. Such code will likely change in the future and stop producing a
-constant.
-
-If your variable is only modified in the place where it is declared, then
-Perl will continue to make the sub inlinable with no warnings.
-
- sub make_constant {
- my $var = shift;
- return sub () { $var }; # fine
- }
-
- sub make_constant_deprecated {
- my $var;
- $var = shift;
- return sub () { $var }; # deprecated
- }
-
- sub make_constant_deprecated2 {
- my $var = shift;
- log_that_value($var); # could modify $var
- return sub () { $var }; # deprecated
- }
-
-In the second example above, detecting that $var is assigned to only once
-is too hard to detect. That it happens in a spot other than the C<my>
-declaration is enough for Perl to find it suspicious.
-
-This deprecation warning happens only for a simple variable for the body of
-the sub. (A C<BEGIN> block or C<use> statement inside the sub is ignored,
-because it does not become part of the sub's body.) For more complex
-cases, such as C<sub () { do_something() if 0; $var }> the behaviour has
-changed such that inlining does not happen if the variable is modifiable
-elsewhere. Such cases should be rare.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-C<(...)x1>, C<("constant")x0> and C<($scalar)x0> are now optimised in list
-context. If the right-hand argument is a constant 1, the repetition
-operator disappears. If the right-hand argument is a constant 0, the whole
-expressions is optimised to the empty list, so long as the left-hand
-argument is a simple scalar or constant. C<(foo())x0> is not optimised.
-
-=item *
-
-C<substr> assignment is now optimised into 4-argument C<substr> at the end
-of a subroutine (or as the argument to C<return>). Previously, this
-optimisation only happened in void context.
-
-=item *
-
-Assignment to lexical variables is often optimised away. For instance, in
-C<$lexical = chr $foo>, the C<chr> operator writes directly to the lexical
-variable instead of returning a value that gets copied. This optimisation
-has been extended to C<split>, C<x> and C<vec> on the right-hand side. It
-has also been made to work with state variable initialization.
-
-=item *
-
-In "\L...", "\Q...", etc., the extra "stringify" op is now optimised away,
-making these just as fast as C<lcfirst>, C<quotemeta>, etc.
-
-=item *
-
-Assignment to an empty list is now sometimes faster. In particular, it
-never calls C<FETCH> on tied arguments on the right-hand side, whereas it
-used to sometimes.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<B> has been upgraded from version 1.52 to 1.53.
-
-=item *
-
-L<B::Concise> has been upgraded from version 0.994 to 0.995.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.29 to 1.30.
-
-It now deparses C<+sub : attr { ... }> correctly at the start of a
-statement. Without the initial C<+>, C<sub> would be a statement label.
-
-C<BEGIN> blocks are now emitted in the right place most of the time, but
-the change unfortunately introduced a regression, in that C<BEGIN> blocks
-occurring just before the end of the enclosing block may appear below it
-instead. So this change may need to be reverted if it cannot be fixed
-before Perl 5.22. [perl #77452]
-
-B::Deparse no longer puts erroneous C<local> here and there, such as for
-C<LIST = tr/a//d>. [perl #119815]
-
-Adjacent C<use> statements are no longer accidentally nested if one
-contains a C<do> block. [perl #115066]
-
-=item *
-
-L<B::Op_private> has been upgraded from version 5.021005 to 5.021006.
-
-It now includes a hash named C<%ops_using>, list all op types that use a
-particular private flag.
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.142690 to 2.143240.
-
-=item *
-
-L<CPAN::Meta::Requirements> has been upgraded from version 2.128 to 2.130.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.18 to 1.19.
-
-=item *
-
-L<Digest::SHA> has been upgraded from version 5.92 to 5.93.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.27 to 1.28.
-
-=item *
-
-L<Encode> has been upgraded from version 2.62 to 2.64.
-
-=item *
-
-L<experimental> has been upgraded from version 0.012 to 0.013.
-
-=item *
-
-L<Exporter> has been upgraded from version 5.71 to 5.72.
-
-=item *
-
-L<ExtUtils::MakeMaker> has been upgraded from version 6.98 to 7.02.
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded from version 1.68 to 1.69.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.25 to 3.26.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.050 to 0.051.
-
-=item *
-
-L<I18N::Langinfo> has been upgraded from version 0.11 to 0.12.
-
-=item *
-
-L<IO::Socket> has been upgraded from version 1.37 to 1.38.
-
-Document the limitations of the connected() method. [perl #123096]
-
-=item *
-
-L<locale> has been upgraded from version 1.04 to 1.05.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20141020 to 5.20141120.
-
-=item *
-
-L<overload> has been upgraded from version 1.23 to 1.24.
-
-=item *
-
-L<PerlIO::encoding> has been upgraded from version 0.19 to 0.20.
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.19 to 0.20.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.45 to 1.46.
-
-=item *
-
-L<re> has been upgraded from version 0.27 to 0.28.
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.33 to 3.34.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.001008 to 1.301001_075.
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.58 to 0.59.
-
-=item *
-
-L<warnings> has been upgraded from version 1.28 to 1.29.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.18 to 0.19.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perldata/Identifier parsing>
-
-=over 4
-
-=item *
-
-The syntax of single-character variable names has been brought
-up-to-date and more fully explained.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Use of literal non-graphic characters in variable names is deprecated|perldiag/"Use of literal non-graphic characters in variable names is deprecated">
-
-=item *
-
-A new C<locale> warning category has been created, with the following warning
-messages currently in it:
-
-=over 4
-
-=item *
-
-L<Locale '%s' may not work well.%s|perldiag/Locale '%s' may not work well.%s>
-
-=item *
-
-L<Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".|perldiag/Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".>
-
-=back
-
-=item *
-
-L<Warning: unable to close filehandle %s properly: %s|perldiag/"Warning: unable to close filehandle %s properly: %s">
-
-=item *
-
-The following two warnings for C<tr///> used to be skipped if the
-transliteration contained wide characters, but now they occur regardless of
-whether there are wide characters or not:
-
-L<Useless use of E<sol>d modifier in transliteration operator|perldiag/"Useless use of /d modifier in transliteration operator">
-
-L<Replacement list is longer than search list|perldiag/Replacement list is longer than search list>
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-L<Quantifier unexpected on zero-length expression in regex mE<sol>%sE<sol>|perldiag/"Quantifier unexpected on zero-length expression in regex m/%s/">.
-
-This message has had the S<"<-- HERE"> marker removed, as it was always
-placed at the end of the regular expression, regardless of where the
-problem actually occurred. [perl #122680]
-
-=item *
-
-L<Setting $E<sol> to a reference to %s as a form of slurp is deprecated, treating as undef|perldiag/"Setting $/ to a reference to %s as a form of slurp is deprecated, treating as undef">
-
-This warning is now a default warning, like other deprecation warnings.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-F<Configure> with C<-Dmksymlinks> should now be faster. [perl #122002]
-
-=back
-
-=over 4
-
-=item *
-
-As well as the gzip and bzip2 tarballs, this release has been made available as an xz utils compressed tarball.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=head3 Win32
-
-=over 4
-
-=item *
-
-In the experimental C<:win32> layer, a crash in C<open> was fixed. Also
-opening C</dev/null>, which works the Win32 Perl's normal C<:unix> layer, was
-implemented for C<:win32>.
-L<[perl #122224]|https://rt.perl.org/Ticket/Display.html?id=122224>
-
-=item *
-
-A new makefile option, C<USE_LONG_DOUBLE>, has been added to the Windows
-dmake makefile for gcc builds only. Set this to "define" if you want perl to
-use long doubles to give more accuracy and range for floating point numbers.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-C<screaminstr> has been removed. Although marked as public API, it is
-undocumented and has no usage in modern perl versions on CPAN Grep. Calling it
-has been fatal since 5.17.0.
-
-=item *
-
-C<newDEFSVOP>, C<block_start>, C<block_end> and C<intro_my> have been added
-to the API.
-
-=item *
-
-The internal C<convert> function in F<op.c> has been renamed
-C<op_convert_list> and added to the API.
-
-=item *
-
-C<sv_magic> no longer forbids "ext" magic on read-only values. After all,
-perl can't know whether the custom magic will modify the SV or not.
-[perl #123103]
-
-=item *
-
-Starting in 5.21.6, accessing L<perlapi/CvPADLIST> in an XSUB is forbidden.
-CvPADLIST has be reused for a different internal purpose for XSUBs. Guard all
-CvPADLIST expressions with C<CvISXSUB()> if your code doesn't already block
-XSUB CV*s from going through optree CV* expecting code.
-
-=back
-
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-fchmod() and futimes() now set C<$!> when they fail due to being
-passed a closed file handle. [perl #122703]
-
-=item *
-
-Perl now comes with a corrected Unicode 7.0 for the erratum issued on
-October 21, 2014 (see L<http://www.unicode.org/errata/#current_errata>),
-dealing with glyph shaping in Arabic.
-
-=item *
-
-op_free() no longer crashes due to a stack overflow when freeing a
-deeply recursive op tree. [perl #108276]
-
-=item *
-
-scalarvoid() would crash due to a stack overflow when processing a
-deeply recursive op tree. [perl #108276]
-
-=item *
-
-In Perl 5.20.0, C<$^N> accidentally had the internal UTF8 flag turned off
-if accessed from a code block within a regular expression, effectively
-UTF8-encoding the value. This has been fixed. [perl #123135]
-
-=item *
-
-A failed C<semctl> call no longer overwrites existing items on the stack,
-causing C<(semctl(-1,0,0,0))[0]> to give an "uninitialized" warning.
-
-=item *
-
-C<else{foo()}> with no space before C<foo> is now better at assigning the
-right line number to that statement. [perl #122695]
-
-=item *
-
-Sometimes the assignment in C<@array = split> gets optimised and C<split>
-itself writes directly to the array. This caused a bug, preventing this
-assignment from being used in lvalue context. So
-C<(@a=split//,"foo")=bar()> was an error. (This bug probably goes back to
-Perl 3, when the optimisation was added.) This optimisation, and the bug,
-started to happen in more cases in 5.21.5. It has now been fixed.
-[perl #123057]
-
-=item *
-
-When argument lists that fail the checks installed by subroutine
-signatures, the resulting error messages now give the file and line number
-of the caller, not of the called subroutine. [perl #121374]
-
-=item *
-
-Flip-flop operators (C<..> and C<...> in scalar context) used to maintain
-a separate state for each recursion level (the number of times the
-enclosing sub was called recursively), contrary to the documentation. Now
-each closure has one internal state for each flip-flop. [perl #122829]
-
-=item *
-
-C<use>, C<no>, statement labels, special blocks (C<BEGIN>) and pod are now
-permitted as the first thing in a C<map> or C<grep> block, the block after
-C<print> or C<say> (or other functions) returning a handle, and within
-C<${...}>, C<@{...}>, etc. [perl #122782]
-
-=item *
-
-The repetition operator C<x> now propagates lvalue context to its left-hand
-argument when used in contexts like C<foreach>. That allows
-C<for(($#that_array)x2) { ... }> to work as expected if the loop modifies
-$_.
-
-=item *
-
-C<(...) x ...> in scalar context used to corrupt the stack if one operand
-were an object with "x" overloading, causing erratic behaviour.
-[perl #121827]
-
-=item *
-
-Assignment to a lexical scalar is often optimised away (as mentioned under
-L</Performance Enhancements>). Various bugs related to this optimisation
-have been fixed. Certain operators on the right-hand side would sometimes
-fail to assign the value at all or assign the wrong value, or would call
-STORE twice or not at all on tied variables. The operators affected were
-C<$foo++>, C<$foo-->, and C<-$foo> under C<use integer>, C<chomp>, C<chr>
-and C<setpgrp>.
-
-=item *
-
-List assignments were sometimes buggy if the same scalar ended up on both
-sides of the assignment due to used of C<tied>, C<values> or C<each>. The
-result would be the wrong value getting assigned.
-
-=item *
-
-C<setpgrp($nonzero)> (with one argument) was accidentally changed in 5.16
-to mean C<setpgrp(0)>. This has been fixed.
-
-=item *
-
-C<__SUB__> could return the wrong value or even corrupt memory under the
-debugger (the B<-d> switch) and in subs containing C<eval $string>.
-
-=item *
-
-When C<sub () { $var }> becomes inlinable, it now returns a different
-scalar each time, just as a non-inlinable sub would, though Perl still
-optimises the copy away in cases where it would make no observable
-difference.
-
-=item *
-
-C<my sub f () { $var }> and C<sub () : attr { $var }> are no longer
-eligible for inlining. The former would crash; the latter would just
-throw the attributes away. An exception is made for the little-known
-":method" attribute, which does nothing much.
-
-=item *
-
-Inlining of subs with an empty prototype is now more consistent than
-before. Previously, a sub with multiple statements, all but the last
-optimised away, would be inlinable only if it were an anonymous sub
-containing a string C<eval> or C<state> declaration or closing over an
-outer lexical variable (or any anonymous sub under the debugger). Now any
-sub that gets folded to a single constant after statements have been
-optimised away is eligible for inlining. This applies to things like C<sub
-() { jabber() if DEBUG; 42 }>.
-
-Some subroutines with an explicit C<return> were being made inlinable,
-contrary to the documentation, Now C<return> always prevents inlining.
-
-=item *
-
-On some systems, such as VMS, C<crypt> can return a non-ASCII string. If a
-scalar assigned to had contained a UTF8 string previously, then C<crypt>
-would not turn off the UTF8 flag, thus corrupting the return value. This
-would happen with C<$lexical = crypt ...>.
-
-=item *
-
-C<crypt> no longer calls C<FETCH> twice on a tied first argument.
-
-=item *
-
-An unterminated here-doc on the last line of a quote-like operator
-(C<qq[${ <<END }]>, C</(?{ <<END })/>) no longer causes a double free. It
-started doing so in 5.18.
-
-=item *
-
-Fixed two assertion failures introduced into C<-DPERL_OP_PARENT>
-builds. [perl #108276]
-
-=back
-
-=head1 Known Problems
-
-=over 4
-
-=item *
-
-Builds on FreeBSD 10.x currently fail when compiling L<POSIX>. A workaround is
-to specify C<-Ui_fenv> when running C<Configure>.
-
-=back
-
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
-
-Due to a mistake in the string-copying logic, copying the value of a state
-variable could instead steal the value and undefine the variable. This
-bug, introduced in 5.20, would happen mostly for long strings (1250 chars
-or more), but could happen for any strings under builds with copy-on-write
-disabled. [perl #123029]
-
-This bug was actually fixed in 5.21.5, but it was not until after that
-release that this bug, and the fact that it had been fixed, were
-discovered.
-
-=item *
-
-If a named sub tries to access a scalar declared in an outer anonymous sub,
-the variable is not available, so the named sub gets its own undefined
-scalar. In 5.10, attempts to take a reference to the variable
-(C<\$that_variable>) began returning a reference to a I<copy> of it
-instead. This was accidentally fixed in 5.21.4, but the bug and its fix
-were not noticed till now.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.6 represents approximately 4 weeks of development since Perl 5.21.5
-and contains approximately 60,000 lines of changes across 920 files from 25
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 48,000 lines of changes to 630 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.6:
-
-Aaron Crane, Abigail, Andrew Fresh, Andy Dougherty, Brian Fraser, Chad Granum,
-Chris 'BinGOs' Williams, Craig A. Berry, Daniel Dragan, David Mitchell, Doug
-Bell, Father Chrysostomos, Glenn D. Golden, James E Keenan, Jarkko Hietaniemi,
-Jim Cromie, Karen Etheridge, Karl Williamson, Lukas Mai, Ricardo Signes, Shlomi
-Fish, Slaven Rezic, Steve Hay, Tony Cook, Yaroslav Kuzmin.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5217delta - what is new for perl v5.21.7
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.6 release and the 5.21.7
-release.
-
-If you are upgrading from an earlier release such as 5.21.5, first read
-L<perl5216delta>, which describes differences between 5.21.5 and 5.21.6.
-
-=head1 Core Enhancements
-
-=head2 faster array and hash lookups
-
-Array and hash lookups (especially nested ones) that use only constants
-or simple variables as keys, are now considerably faster. See
-L</Internal Changes> for more details.
-
-=head2 C<fileno> now works on directory handles
-
-When the relevant support is available in the operating system, the
-C<fileno> builtin now works on directory handles, yielding the
-underlying file descriptor in the same way as for filehandles. On
-operating systems without such support, C<fileno> on a directory handle
-continues to return the undefined value, as before, but also sets C<$!> to
-indicate that the operation is not supported.
-
-Currently, this uses either a C<dd_fd> member in the OS C<DIR>
-structure, or a dirfd(3) function as specified by POSIX.1-2008.
-
-=head1 Incompatible Changes
-
-=head2 C<&> and C<\&> prototypes accepts only subs
-
-The C<&> prototype character now accepts only anonymous subs (C<sub {...}>)
-and things beginning with C<\&>. Formerly it erroneously also allowed
-C<undef> and references to array, hashes, and lists. [perl #4539]
-[perl #123062]
-
-The C<\&> prototype was allowing subroutine calls, whereas now it only
-allows subroutines. C<&foo> is permitted. C<&foo()> and C<foo()> are not.
-[perl #77860]
-
-=head2 C<use encoding> is now lexical
-
-The L<encoding> pragma's effect is now limited to lexical scope. This
-pragma is deprecated, but in the meantime, it could adversely affect
-unrelated modules that are included in the same program.
-
-=head2 List slices returning empty lists
-
-List slices return an empty list now only if the original list was empty
-(or if there are no indices). Formerly, a list slice would return an empty
-list if all indices fell outside the original list. [perl #114498]
-
-=head1 Deprecations
-
-=head2 Setting C<${^ENCODING}> to anything but C<undef>
-
-This variable allows Perl scripts to be written in a non-ASCII,
-non-UTF-8 encoding. However, it affects all modules globally, leading
-to wrong answers and segmentation faults. New scripts should be written
-in UTF-8; old scripts should be converted to UTF-8, which is easily done
-with the L<encoding> pragma.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Win32 Perl uses 8 KB less of per-process memory than before for every perl
-process of this version. This data is now memory mapped from disk and shared
-between perl processes from the same perl binary.
-
-=item *
-
-If method and class names are known at compile time, hashes are precomputed
-to speed up run-time method lookup. Also, compound method names like
-C<SUPER::new> are parsed at compile time, to save having to parse them at
-run time.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-The PathTools module collection has been upgraded from 3.52 to 3.53.
-
-Don't turn leading C<//> into C</> on Cygwin. [perl #122635]
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.02 to 2.04.
-
-=item *
-
-L<arybase> has been upgraded from version 0.08 to 0.09.
-
-=item *
-
-L<B> has been upgraded from version 1.53 to 1.54.
-
-Nulled COPs are now of class C<B::COP>, rather than C<B::OP>.
-
-B::REGEXP objects now provide a C<qr_anoncv> method for accessing the
-implicit CV associated with C<qr//> things containing code blocks, and a
-C<compflags> method that returns the pertinent flags originating from the
-C<qr//blahblah> op.
-
-B::PMOP now provides a C<pmregexp> method returning a B::REGEXP object.
-
-Two new classes, B::PADNAME and B::PADNAMELIST, have been introduced.
-
-=item *
-
-L<B::Concise> has been upgraded from version 0.995 to 0.996.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.30 to 1.31.
-
-BEGIN blocks at the end of the enclosing scope are now deparsed in the
-right place. [perl #77452]
-
-BEGIN blocks were sometimes deparsed as __ANON__, but are now always called
-BEGIN.
-
-Lexical subroutines are now fully deparsed. [perl #116553]
-
-Deparsing of C<$lexical =~ //> was accidentally broken in 1.30 (perl
-5.21.6), omitting the C<$lexical =~>, but has now been fixed.
-
-C<Anything =~ y///r> with C</r> no longer omits the left-hand operand.
-
-The op trees that make up regexp code blocks are now deparsed for real.
-Formerly, the original string that made up the regular expression was used.
-That caused problems with C<qr/(?{E<lt>E<lt>heredoc})/> and multiline code blocks,
-which were deparsed incorrectly. [perl #123217] [perl #115256]
-
-C<$;> at the end of a statement no longer loses its semicolon.
-[perl #123357]
-
-Some cases of subroutine declarations stored in the stash in shorthand form
-were being omitted.
-
-Non-ASCII characters are now consistently escaped in strings, instead of
-some of the time. (There are still outstanding problems with regular
-expressions and identifiers that have not been fixed.)
-
-When prototype sub calls are deparsed with C<&> (e.g., under the B<-P>
-option), C<scalar> is now added where appropriate, to force the scalar
-context implied by the prototype.
-
-C<require(foo())>, C<do(foo())>, C<goto(foo())> and similar constructs with
-loop controls are now deparsed correctly. The outer parentheses are not
-optional.
-
-Whitespace is no longer escaped in regular expressions, because it was
-getting erroneously escaped within C<(?x:...)> sections.
-
-C<sub foo { foo() }> is now deparsed with those mandatory parentheses.
-
-C</@array/> is now deparsed as a regular expression, and not just
-C<@array>.
-
-C</@{-}/>, C</@{+}/> and C<$#{1}> are now deparsed with the braces, which
-are mandatory in these cases.
-
-In deparsing feature bundles, B::Deparse was emitting C<no feature;> first
-instead of C<no feature ':all';>. This has been fixed.
-
-C<chdir FH> is now deparsed without quotation marks.
-
-C<\my @a> is now deparsed without parentheses. (Parenthese would flatten
-the array.)
-
-C<system> and C<exec> followed by a block are now deparsed correctly.
-Formerly there was an erroneous C<do> before the block.
-
-C<< use constant QR =E<gt> qr/.../flags >> followed by C<"" =~ QR> is no longer
-without the flags.
-
-=item *
-
-L<charnames> has been upgraded from version 1.41 to 1.43.
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.066 to 2.067.
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.066 to 2.067.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.154 to 2.155.
-
-=item *
-
-L<DB_File> has been upgraded from version 1.831 to 1.834.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.19 to 1.20.
-
-=item *
-
-L<Devel::PPPort> has been upgraded from version 3.24 to 3.25.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.28 to 1.29.
-
-=item *
-
-L<Encode> has been upgraded from version 2.64 to 2.67.
-
-=item *
-
-L<Errno> has been upgraded from version 1.21 to 1.22.
-
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded from version 0.280220 to 0.280221.
-
-=item *
-
-L<ExtUtils::MakeMaker> has been upgraded from version 7.02 to 7.04.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.26 to 3.27.
-
-Only declare C<file> unused if we actually define it.
-
-Improve generated C<RETVAL> code generation to avoid repeated
-references to C<ST(0)>. [perl #123278]
-
-Broaden and document the C</OBJ$/> to C</REF$/> typemap optimization
-for the C<DESTROY> method. [perl #123418]
-
-=item *
-
-L<feature> has been upgraded from version 1.38 to 1.39.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.51 to 3.54.
-
-=item *
-
-L<Filter::Util::Call> has been upgraded from version 1.49 to 1.51.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.051 to 0.053.
-
-=item *
-
-L<IO> has been upgraded from version 1.34 to 1.35.
-
-=item *
-
-The IO::Compress module collection has been upgraded from version 2.066 to 2.067.
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.32 to 0.34.
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.32 to 3.33.
-
-=item *
-
-L<Locale::Maketext> has been upgraded from version 1.25 to 1.26.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20141120 to 5.20141220.
-
-=item *
-
-L<mro> has been upgraded from version 1.16 to 1.17.
-
-=item *
-
-L<NDBM_File> has been upgraded from version 1.13 to 1.14.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.29 to 1.30.
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.20 to 0.21.
-
-Reading from a position well past the end of the scalar now correctly
-returns end of file. [perl #123443]
-
-Seeking to a negative position still fails, but no longer leaves the
-file position set to a negation location.
-
-C<eof()> on a C<PerlIO::scalar> handle now properly returns true when
-the file position is past the 2GB mark on 32-bit systems.
-
-=item *
-
-L<Pod::Escapes> has been upgraded from version 1.06 to 1.07.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.46 to 1.48.
-
-=item *
-
-L<SDBM_File> has been upgraded from version 1.11 to 1.12.
-
-=item *
-
-L<Storable> has been upgraded from version 2.51 to 2.52.
-
-=item *
-
-L<strict> has been upgraded from version 1.08 to 1.09.
-
-=item *
-
-L<Sys::Hostname> has been upgraded from version 1.19 to 1.20.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.301001_075 to 1.301001_090.
-
-=item *
-
-L<threads> has been upgraded from version 1.96 to 1.96_001.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.07 to 1.09.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.19 to 0.20
-
-Don't test twice for bootstrap file.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-"Variable %s will not stay shared" has been changed to say "Subroutine"
-when it is actually a lexical sub that will not stay shared.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=head3 Win32
-
-=over
-
-=item *
-
-Intel C builds are now always built with C99 mode on.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-The PADNAME and PADNAMELIST types are now separate types, and no longer
-simply aliases for SV and AV. [perl #123223]
-
-=item *
-
-Pad names are now always UTF8. The C<PadnameUTF8> macro always returns
-true. Previously, this was effectively the case already, but any support
-for two different internal representations of pad names has now been
-removed.
-
-=item *
-
-The C<OP_SIBLING> and C<OP_HAS_SIBLING> macros added in an earlier 5.21.x
-release have been renamed C<OpSIBLING> and C<OpHAS_SIBLING>, following the
-existing convention.
-
-=item *
-
-A new op class, C<UNOP_AUX>, has been added. This is a subclass of
-C<UNOP> with an C<op_aux> field added, which points to an array of unions
-of C<UV>, C<SV*> etc. It is intended for where an op needs to store more data
-than a simple C<op_sv> or whatever. Currently the only op of this type is
-C<OP_MULTIDEREF> (see below).
-
-=item *
-
-A new op has been added, C<OP_MULTIDEREF>, which performs one or more
-nested array and hash lookups where the key is a constant or simple
-variable. For example the expression C<$a[0]{$k}[$i]>, which previously
-involved ten C<rv2Xv>, C<Xelem>, C<gvsv> and C<const> ops is now performed
-by a single C<multideref> op. It can also handle C<local>, C<exists> and
-C<delete>. A non-simple index expression, such as C<[$i+1]> is still done
-using C<aelem/helem>, and single-level array lookup with a small constant
-index is still done using C<aelemfast>.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-On Win32, restoring in a child pseudo-process a variable that was
-C<local()>ed in a parent pseudo-process before the C<fork> happened caused
-memory corruption and a crash in the child pseudo-process (and therefore OS
-process). [perl #40565]
-
-=item *
-
-Calling C<write> on a format with a C<^**> field could produce a panic
-in sv_chop() if there were insufficient arguments or if the variable
-used to fill the field was empty. [perl #123245]
-
-=item *
-
-Non-ASCII lexical sub names (use in error messages) on longer have extra
-junk on the end.
-
-=item *
-
-The C<\@> subroutine prototype no longer flattens parenthesized arrays
-(taking a reference to each element), but takes a reference to the array
-itself. [perl #47363]
-
-=item *
-
-A block containing nothing except a C-style C<for> loop could corrupt the
-stack, causing lists outside the block to lose elements or have elements
-overwritten. This could happen with C<map { for(...){...} } ...> and with
-lists containing C<do { for(...){...} }>. [perl #123286]
-
-=item *
-
-C<scalar()> now propagates lvalue context, so that
-C<for(scalar($#foo)) { ... }> can modify C<$#foo> through C<$_>.
-
-=item *
-
-C<qr/@array(?{block})/> no longer dies with "Bizarre copy of ARRAY".
-[#123344]
-
-=item *
-
-C<eval '$variable'> in nested named subroutines would sometimes look up a
-global variable even with a lexical variable in scope.
-
-=item *
-
-In perl 5.20.0, C<sort CORE::fake> where 'fake' is anything other than a
-keyword started chopping of the last 6 characters and treating the result
-as a sort sub name. The previous behaviour of treating "CORE::fake" as a
-sort sub name has been restored. [perl #123410]
-
-=item *
-
-Outside of C<use utf8>, a single-character Latin-1 lexical variable is
-disallowed. The error message for it, "Can't use global $foo...", was
-giving garbage instead of the variable name.
-
-=item *
-
-C<readline> on a nonexistent handle was causing C<${^LAST_FH}> to produce a
-reference to an undefined scalar (or fail an assertion). Now
-C<${^LAST_FH}> ends up undefined.
-
-=item *
-
-C<(...)x...> in void context now applies scalar context to the left-hand
-argument, instead of the context the current sub was called in.
-[perl #123020]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.7 represents approximately 4 weeks of development since Perl 5.21.6
-and contains approximately 97,000 lines of changes across 640 files from 30
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 26,000 lines of changes to 400 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.7:
-
-Aaron Crane, Aristotle Pagaltzis, Chad Granum, Chris 'BinGOs' Williams, Craig
-A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, David Mitchell, Eric
-Herman, Father Chrysostomos, H.Merijn Brand, Hugo van der Sanden, James
-Raspass, Jarkko Hietaniemi, Jim Cromie, Karen Etheridge, Karl Williamson, kmx,
-Lukas Mai, Matthew Horsfall, Max Maischein, Petr Písař, Ricardo Signes,
-Shlomi Fish, Steffen Müller, Steve Hay, Sullivan Beck, syber, Todd Rinaldo,
-Tony Cook.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5218delta - what is new for perl v5.21.8
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.7 release and the 5.21.8
-release.
-
-If you are upgrading from an earlier release such as 5.21.6, first read
-L<perl5217delta>, which describes differences between 5.21.6 and 5.21.7.
-
-=head1 Notice
-
-With this release we are now in the contentious changes portion of the code
-freeze as we prepare for the next stable release of Perl 5.
-
-=head1 Core Enhancements
-
-=head2 The warnings pragma now supports warnings outside of "all"
-
-Ever since perl v5.6.0 we've had no way of adding new warnings without
-retroactively adding them to all existing programs that used C<-w>,
-C<-W> or C<use warnings>.
-
-This caused us to not add new useful warnings out of fear that they
-might unduly burden users who just wanted to upgrade perl and didn't
-want to deal with a bunch of warnings from their existing code.
-
-We now support a way to have our cake and eat it too, and can add new
-warnings to the core going forward through other top-level warning
-categories. See L<the warnings documentation|warnings/Top-level
-warning categories & associated confusion> for details.
-
-=head2 Non-Capturing Regular Expression Flag
-
-Regular expressions now support a C</n> flag that disables capturing
-and filling in C<$1>, C<$2>, etc... inside of groups:
-
- "hello" =~ /(hi|hello)/n; # $1 is not set
-
-This is equivalent to putting C<?:> at the beginning of every capturing group.
-
-See L<perlre/"n"> for more information.
-
-=head2 C<prototype> with no arguments
-
-C<prototype()> with no arguments now infers C<$_>. [perl #123514]
-
-=head2 C<use re 'strict'>
-
-This applies stricter syntax rules to regular expression patterns
-compiled within its scope, which hopefully will alert you to typos and
-other unintentional behavior that backwards-compatibility issues prevent
-us from doing in normal regular expression compilations. Because the
-behavior of this is subject to change in future Perl releases as we gain
-experience, using this pragma will raise a category
-C<experimental:re_strict> warning.
-See L<'strict' in re|re/'strict' mode>.
-
-=head2 New "const" subroutine attribute
-
-The "const" attribute can be applied to an anonymous subroutine. It causes
-it to be executed immediately when it is cloned. Its value is captured and
-used to create a new constant subroutine that is returned. This feature is
-experimental. See L<perlsub/Constant Functions>.
-
-=head1 Incompatible Changes
-
-=head2 sub signatures moved before attributes
-
-The experimental sub signatures feature, as introduced in 5.20, parsed
-signatures after attributes. In this release, the positioning has been
-moved such that signatures occur in exactly the same positioning a
-prototype would be found.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<arybase> has been upgraded from version 0.09 to 0.10.
-
-=item *
-
-L<attributes> has been upgraded from version 0.24 to 0.25.
-
-Minor internal change only.
-
-=item *
-
-L<autodie> has been upgraded from version 2.25 to 2.26.
-
-=item *
-
-L<B> has been upgraded from version 1.54 to 1.55.
-
-A bug where, after an ithread creation or psuedofork, special/immortal SVs in
-the child ithread/psuedoprocess did not have the correct class of
-C<B::SPECIAL>, has been fixed.
-
-The C<id> and C<outid> PADLIST methods have been added.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.31 to 1.32.
-
-Deparsing C<BEGIN { undef &foo }> with the B<-w> switch enabled started to
-emit 'uninitialized' warnings in Perl 5.14. This has been fixed.
-
-Deparsing calls to subs with a C<(;+)> prototype resulted in an infinite
-loop. The C<(;$>) C<(_)> and C<(;_)> prototypes were given the wrong
-precedence, causing C<foo($aE<lt>$b)> to be deparsed without the parentheses.
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.067 to 2.068.
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.067 to 2.068.
-
-=item *
-
-L<CPAN::Meta::Requirements> has been upgraded from version 2.130 to 2.131.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.155 to 2.156.
-
-=item *
-
-L<DB_File> has been upgraded from version 1.834 to 1.835.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.20 to 1.21.
-
-=item *
-
-L<Devel::PPPort> has been upgraded from version 3.25 to 3.28.
-
-=item *
-
-L<Digest::MD5> has been upgraded from version 2.53 to 2.54.
-
-=item *
-
-L<Digest::SHA> has been upgraded from version 5.93 to 5.95.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.29 to 1.30.
-
-=item *
-
-L<ExtUtils::Command> has been upgraded from version 1.18 to 1.20.
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded from version 1.69 to 1.70.
-
-=item *
-
-L<File::Glob> has been upgraded from version 1.23 to 1.24.
-
-Avoid SvIV() expanding to call get_sv() three times in a few
-places. [perl #123606]
-
-=item *
-
-L<Filter::Util::Call> has been upgraded from version 1.51 to 1.54.
-
-=item *
-
-L<Getopt::Long> has been upgraded from version 2.42 to 2.43.
-
-=item *
-
-L<IO::Compress::Base> has been upgraded from version 2.067 to 2.068.
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.34 to 0.36.
-
-=item *
-
-L<MIME::Base64> has been upgraded from version 3.14 to 3.15.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20141220 to 5.20150120.
-
-=item *
-
-L<Module::Load::Conditional> has been upgraded from version 0.62 to 0.64.
-
-=item *
-
-L<Module::Metadata> has been upgraded from version 1.000024 to 1.000026.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.30 to 1.31.
-
-=item *
-
-L<PerlIO::encoding> has been upgraded from version 0.20 to 0.21.
-
-=item *
-
-L<Pod::Simple> has been upgraded from version 3.28 to 3.29.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.48 to 1.49.
-
-=item *
-
-L<re> has been upgraded from version 0.28 to 0.30.
-
-=item *
-
-L<Safe> has been upgraded from version 2.38 to 2.39.
-
-C<reval> was not propagating void context properly.
-
-=item *
-
-L<SDBM_File> has been upgraded from version 1.12 to 1.13.
-
-Simplified the build process. [perl #123413]
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.34 to 3.35.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.301001_090 to 1.301001_097.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.09 to 1.10.
-
-=item *
-
-L<VMS::DCLsym> has been upgraded from version 1.05 to 1.06.
-
-=item *
-
-L<warnings> has been upgraded from version 1.29 to 1.30.
-
-=back
-
-=head1 Documentation
-
-=head2 New Documentation
-
-=head3 L<perlunicook>
-
-This document, by Tom Christiansen, provides examples of handling Unicode in
-Perl.
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Bad symbol for scalar|perldiag/"Bad symbol for scalar">
-
-(P) An internal request asked to add a scalar entry to something that
-wasn't a symbol table entry.
-
-=item *
-
-L<:const is not permitted on named subroutines|perldiag/":const is not permitted on named subroutines">
-
-(F) The "const" attribute causes an anonymous subroutine to be run and
-its value captured at the time that it is cloned. Names subroutines are
-not cloned like this, so the attribute does not make sense on them.
-
-=back
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<:const is experimental|perldiag/":const is experimental">
-
-(S experimental::const_attr) The "const" attribute is experimental.
-If you want to use the feature, disable the warning with C<no warnings
-'experimental::const_attr'>, but know that in doing so you are taking
-the risk that your code may break in a future Perl version.
-
-=item *
-
-L<Non-finite repeat count does nothing|perldiag/"Non-finite repeat count does nothing">
-
-(W numeric) You tried to execute the
-L<C<x>|perlop/Multiplicative Operators> repetition operator C<Inf> (or
-C<-Inf>) or C<NaN> times, which doesn't make sense.
-
-=item *
-
-L<Useless use of attribute "const"|perldiag/Useless use of attribute "const">
-
-(W misc) The "const" attribute has no effect except
-on anonymous closure prototypes. You applied it to
-a subroutine via L<attributes.pm|attributes>. This is only useful
-inside an attribute handler for an anonymous subroutine.
-
-=item *
-
-L<Unusual use of %s in void context|perldiag/"Unusual use of %s in void context">
-
-(W void_unusual) Similar to the "Useless use of %s in void context"
-warning, but only turned on by the top-level "pedantic" warning
-category, used for e.g. C<grep> in void context, which may indicate a
-bug, but could also just be someone using C<grep> for its side-effects
-as a loop.
-
-Enabled as part of "extra" warnings, not in the "all" category. See
-L<warnings> for details
-
-=item *
-
-L<E<quot>use re 'strict'E<quot> is experimental|perldiag/"use re 'strict'" is experimental>
-
-(S experimental::re_strict) The things that are different when a regular
-expression pattern is compiled under C<'strict'> are subject to change
-in future Perl releases in incompatible ways. This means that a pattern
-that compiles today may not in a future Perl release. This warning is
-to alert you to that risk.
-
-L<Wide character (U+%X) in %s|perldiag/"Wide character (U+%X) in %s">
-
-(W locale) While in a single-byte locale (I<i.e.>, a non-UTF-8
-one), a multi-byte character was encountered. Perl considers this
-character to be the specified Unicode code point. Combining non-UTF8
-locales and Unicode is dangerous. Almost certainly some characters
-will have two different representations. For example, in the ISO 8859-7
-(Greek) locale, the code point 0xC3 represents a Capital Gamma. But so
-also does 0x393. This will make string comparisons unreliable.
-
-You likely need to figure out how this multi-byte character got mixed up
-with your single-byte locale (or perhaps you thought you had a UTF-8
-locale, but Perl disagrees).
-
-=item *
-
-L<Both or neither range ends should be Unicode in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Both or neither range ends should be Unicode in regex; marked by <-- HERE in m/%s/">
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-In a bracketed character class in a regular expression pattern, you
-had a range which has exactly one end of it specified using C<\N{}>, and
-the other end is specified using a non-portable mechanism. Perl treats
-the range as a Unicode range, that is, all the characters in it are
-considered to be the Unicode characters, and which may be different code
-points on some platforms Perl runs on. For example, C<[\N{U+06}-\x08]>
-is treated as if you had instead said C<[\N{U+06}-\N{U+08}]>, that is it
-matches the characters whose code points in Unicode are 6, 7, and 8.
-But that C<\x08> might indicate that you meant something different, so
-the warning gets raised.
-
-=item *
-
-L<Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by <-- HERE in mE<sol>%sE<sol>">
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-Stricter rules help to find typos and other errors. Perhaps you didn't
-even intend a range here, if the C<"-"> was meant to be some other
-character, or should have been escaped (like C<"\-">). If you did
-intend a range, the one that was used is not portable between ASCII and
-EBCDIC platforms, and doesn't have an obvious meaning to a casual
-reader.
-
- [3-7] # OK; Obvious and portable
- [d-g] # OK; Obvious and portable
- [A-Y] # OK; Obvious and portable
- [A-z] # WRONG; Not portable; not clear what is meant
- [a-Z] # WRONG; Not portable; not clear what is meant
- [%-.] # WRONG; Not portable; not clear what is meant
- [\x41-Z] # WRONG; Not portable; not obvious to non-geek
-
-(You can force portability by specifying a Unicode range, which means that
-the endpoints are specified by
-L<C<\N{...}>|perlrecharclass/Character Ranges>, but the meaning may
-still not be obvious.)
-The stricter rules require that ranges that start or stop with an ASCII
-character that is not a control have all their endpoints be the literal
-character, and not some escape sequence (like C<"\x41">), and the ranges
-must be all digits, or all uppercase letters, or all lowercase letters.
-
-=item *
-
-L<Ranges of digits should be from the same group in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of digits should be from the same group in regex; marked by <-- HERE in m/%s/">
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-Stricter rules help to find typos and other errors. You included a
-range, and at least one of the end points is a decimal digit. Under the
-stricter rules, when this happens, both end points should be digits in
-the same group of 10 consecutive digits.
-
-=item *
-
-L<"%s" is more clearly written simply as "%s" in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"%s" is more clearly written simply as "%s" in regex; marked by <-- HERE in mE<sol>%sE<sol>>
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-You specified a character that has the given plainer way of writing it,
-and which is also portable to platforms running with different character
-sets.
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-The message
-L<Locale '%s' may not work well.%s|perldiag/"Locale '%s' may not work well.%s">
-is no longer raised unless the problemtatic locale is actually used in
-the Perl program. Previously it was raised if it merely was the
-underlying locale. All Perl programs have an underlying locale at all
-times, but something like a C<S<use locale>> is needed for that locale
-to actually have some effect. This message will not be raised when
-the underlying locale is hidden.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-pthreads and lcl will be linked by default if present. This allows XS modules
-that require threading to work on non-threaded perls. Note that you must still
-pass C<-Dusethreads> if you want a threaded perl.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-A new test script, F<bigmem/subst.t>, has been added to test memory usage of
-subst on very large strings.
-
-=item *
-
-A new test script, F<op/anonconst.t>, has been added to test experimental
-:const subroutines.
-
-=item *
-
-A new test script, F<re/reg_nocapture.t>, has been added to test the new
-C</n> regexp flag.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Win32
-
-=over 4
-
-=item *
-
-Previously, on Visual C++ for Win64 built Perls only, when compiling every Perl
-XS module (including CPAN ones) and Perl aware .c file with a 64 bit Visual C++,
-would unconditionally have around a dozen warnings from hv_func.h. These
-warnings have been silenced. GCC all bitness and Visual C++ for Win32 were
-not affected.
-
-=item *
-
-Support for building without PerlIO has been removed from the Windows
-makefiles. Non-PerlIO builds were all but deprecated in Perl 5.18.0 and are
-already not supported by F<Configure> on POSIX systems.
-
-=item *
-
-Between 2 and 6 ms and 7 I/O calls have been saved per attempt to open a perl
-module for each path in C<@INC>.
-
-=back
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Added Perl_sv_get_backrefs() to determine if an SV is a weak-referent.
-
-Function either returns an SV * of type AV, which contains the set of
-weakreferences which reference the passed in SV, or a simple RV * which
-is the only weakref to this item.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-A bug in regular expression patterns that could lead to segfaults and
-other crashes has been fixed. This occurred only in patterns compiled
-with C<"/i">, while taking into account the current POSIX locale (this usually
-means they have to be compiled within the scope of C<S<"use locale">>),
-and there must be a string of at least 128 consecutive bytes to match.
-[perl #123539]
-
-=item *
-
-C<s///> now works on very long strings instead of dying with 'Substitution
-loop'. [perl #103260] [perl #123071]
-
-=item *
-
-C<gmtime> no longer crashes with not-a-number values. [perl #123495]
-
-=item *
-
-C<\()> (reference to an empty list) and C<y///> with lexical $_ in scope
-could do a bad write past the end of the stack. They have been fixed
-to extend the stack first.
-
-=item *
-
-C<prototype()> with no arguments used to read the previous item on the
-stack, so C<print "foo", prototype()> would print foo's prototype. It has
-been fixed to infer $_ instead. [perl #123514]
-
-=item *
-
-Some cases of lexical state subs inside predeclared subs could crash but no
-longer do.
-
-=item *
-
-Some cases of nested lexical state subs inside anonymous subs could cause
-'Bizarre copy' errors or possibly even crash.
-
-=item *
-
-When trying to emit warnings, perl's default debugger (F<perl5db.pl>) was
-sometimes giving 'Undefined subroutine &DB::db_warn called' instead. This
-bug, which started to occur in Perl 5.18, has been fixed. [perl #123553]
-
-=item *
-
-Certain syntax errors in substitutions, such as C<< s/${E<lt>E<gt>{})// >>, would
-crash, and had done so since Perl 5.10. (In some cases the crash did not
-start happening till 5.16.) The crash has, of course, been fixed.
-[perl #123542]
-
-=item *
-
-A repeat expression like C<33 x ~3> could cause a large buffer
-overflow since the new output buffer size was not correctly handled by
-SvGROW(). An expression like this now properly produces a memory wrap
-panic. [perl 123554]
-
-=item *
-
-C<< formline("@...", "a"); >> would crash. The C<FF_CHECKNL> case in
-pp_formline() didn't set the pointer used to mark the chop position,
-which led to the C<FF_MORE> case crashing with a segmentation fault.
-This has been fixed. [perl #123538]
-
-=item *
-
-A possible buffer overrun and crash when parsing a literal pattern during
-regular expression compilation has been fixed. [perl #123604]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.8 represents approximately 4 weeks of development since Perl 5.21.7
-and contains approximately 26,000 lines of changes across 750 files from 27
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 13,000 lines of changes to 410 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.8:
-
-Aaron Crane, Andreas Voegele, Chad Granum, Chris 'BinGOs' Williams, Craig A.
-Berry, Daniel Dragan, David Mitchell, E. Choroba, Ed J, Father Chrysostomos,
-H.Merijn Brand, Hugo van der Sanden, James E Keenan, Jarkko Hietaniemi, Karen
-Etheridge, Karl Williamson, Matthew Horsfall, Max Maischein, Peter Martini,
-Rafael Garcia-Suarez, Ricardo Signes, Rostislav Skudnov, Slaven Rezic, Steve
-Hay, Tony Cook, Yves Orton, Ævar Arnfjörð Bjarmason.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5219delta - what is new for perl v5.21.9
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.21.8 release and the 5.21.9
-release.
-
-If you are upgrading from an earlier release such as 5.21.7, first read
-L<perl5218delta>, which describes differences between 5.21.7 and 5.21.8.
-
-=head1 Notice
-
-With this release we are now in the user-visible changes portion of the code
-freeze as we prepare for the next stable release of Perl 5.
-
-=head1 Core Enhancements
-
-=head2 qr/\b{gcb}/ is now handled in regular expressions
-
-C<gcb> stands for Grapheme Cluster Boundary. It is a Unicode property
-that finds the boundary between sequences of characters that look like a
-single character to a native speaker of a language. Perl has long had
-the ability to deal with these through the C<\X> regular escape
-sequence. Now, there is an alternative way of handling these. See
-L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
-
-=head2 qr/\b{wb}/ is now handled in regular expressions
-
-C<wb> stands for Word Boundary. It is a Unicode property
-that finds the boundary between words. This is similar to the plain
-C<\b> (without braces) but is more suitable for natural language
-processing. It knows, for example that apostrophes can occur in the
-middle of words. See L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
-
-=head2 qr/\b{sb}/ is now handled in regular expressions
-
-C<sb> stands for Sentence Boundary. It is a Unicode property
-to aid in parsing natural language sentences.
-See L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
-
-=head2 New bitwise operators
-
-A new experimental facility has been added that makes the four standard
-bitwise operators (C<& | ^ ~>) treat their operands consistently as
-numbers, and introduces four new dotted operators (C<&. |. ^. ~.>) that
-treat their operands consistently as strings. The same applies to the
-assignment variants (C<&= |= ^= &.= |.= ^.=>).
-
-To use this, enable the "bitwise" feature and disable the
-"experimental::bitwise" warnings category. See L<perlop/Bitwise String
-Operators> for details. [rt.perl.org #123466]
-
-=head2 C<no re> covers more and is lexical
-
-Previously running C<no re> would only turn off a few things. Now it
-turns off all the enabled things. For example, previously, you
-couldn't turn off debugging, once enabled, inside the same block.
-
-=head1 Incompatible Changes
-
-There are no changes intentionally incompatible with 5.21.8.
-If any exist, they are bugs, and we request that you submit a
-report. See L</Reporting Bugs> below.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<attributes> has been upgraded from version 0.25 to 0.26.
-
-=item *
-
-L<B> has been upgraded from version 1.55 to 1.56.
-
-=item *
-
-L<B::Debug> has been upgraded from version 1.22 to 1.23.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.32 to 1.33.
-
-=over 4
-
-=item *
-
-Deparse now provides a defined state sub in inner subs.
-
-=item *
-
-Since version Perl 5.21.6, Deparse would croak on special constants, but
-this has now been fixed.
-
-=back
-
-=item *
-
-L<Benchmark> has been upgraded from version 1.19 to 1.20.
-
-=item *
-
-L<bigint>, L<bignum>, L<bigrat> have been upgraded to version 0.39.
-
-Document in CAVEATS that using strings as numbers won't always invoke
-the big number overloading, and how to invoke it. [rt.perl.org #123064]
-
-=item *
-
-L<bignum> has been upgraded from version 0.38 to 0.39.
-
-=item *
-
-L<Carp> has been upgraded from version 1.34 to 1.35.
-
-=over 4
-
-=item *
-
-Carp now handles non-ASCII platforms better.
-
-=item *
-
-Off-by-one error fix for Perl E<lt> 5.14.
-
-=back
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.22 to 0.23.
-
-=item *
-
-L<constant> has been upgraded from version 1.32 to 1.33.
-
-=item *
-
-L<CPAN::Meta::Requirements> has been upgraded from version 2.131 to 2.132
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.156 to 2.157.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.21 to 1.22.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.30 to 1.31.
-
-=item *
-
-L<Encode> has been upgraded from version 2.67 to 2.70.
-
-Building in C++ mode on Windows now works.
-
-=item *
-
-L<encoding> has been upgraded from version 2.12 to 2.13.
-
-=item *
-
-L<Errno> has been upgraded from version 1.22 to 1.23.
-
-Add C<-P> to the preprocessor command-line on GCC 5. GCC added extra
-line directives, breaking parsing of error code definitions. [rt.perl.org
-#123784]
-
-=item *
-
-L<ExtUtils::Miniperl> has been upgraded from version 1.03 to 1.04.
-
-=item *
-
-L<feature> has been upgraded from version 1.39 to 1.40.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.053 to 0.054.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.31 to 1.32.
-
-=item *
-
-L<overload> has been upgraded from version 1.24 to 1.25.
-
-=item *
-
-L<Perl::OSType> has been upgraded from version 1.007 to 1.008.
-
-=item *
-
-L<perlfaq> has been upgraded from version 5.0150046 to 5.021009.
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.21 to 0.22.
-
-Attempting to write at file positions impossible for the platform now
-fail early rather than wrapping at 4GB.
-
-=item *
-
-L<Pod::Parser> has been upgraded from version 1.62 to 1.63.
-
-=item *
-
-L<Pod::Perldoc> has been upgraded from version 3.24 to 3.25.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.49 to 1.51.
-
-=item *
-
-L<re> has been upgraded from version 0.30 to 0.31.
-
-=item *
-
-L<Socket> has been upgraded from version 2.016 to 2.018.
-
-=item *
-
-L<Storable> has been upgraded from version 2.52 to 2.53.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.301001_097 to 1.301001_098.
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.47 to 1.48.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.10 to 1.11.
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.59 to 0.61.
-
-=over 4
-
-=item *
-
-A new function L<property_values()|Unicode::UCD/prop_values()>
-has been added to return a given property's possible values.
-
-=item *
-
-A new function L<charprop()|Unicode::UCD/charprop()>
-has been added to return the value of a given property for a given code
-point.
-
-=item *
-
-A new function L<charprops_all()|Unicode::UCD/charprops_all()>
-has been added to return the values of all Unicode properties for a
-given code point.
-
-=item *
-
-A bug has been fixed so that L<propaliases()|Unicode::UCD/prop_aliases()>
-returns the correct short and long names for the Perl extensions where
-it was incorrect.
-
-=item *
-
-A bug has been fixed so that
-L<prop_value_aliases()|Unicode::UCD/prop_value_aliases()>
-returns C<undef> instead of a wrong result for properties that are Perl
-extensions.
-
-=item *
-
-This module now works on EBCDIC platforms.
-
-=back
-
-=item *
-
-L<VMS::Stdio> has been upgraded from version 2.4 to 2.41.
-
-=item *
-
-L<warnings> has been upgraded from version 1.30 to 1.31.
-
-=item *
-
-L<Win32> has been upgraded from version 0.49 to 0.51.
-
-GetOSName() now supports Windows 8.1, and building in C++ mode now works.
-
-=item *
-
-L<Win32API::File> has been upgraded from version 0.1201 to 0.1202
-
-Building in C++ mode now works.
-
-=back
-
-=head1 Documentation
-
-=head2 New Documentation
-
-=head3 L<perlrebackslash>
-
-=over 4
-
-=item *
-
-Added documentation of C<\b{sb}>, C<\b{wb}>, C<\b{gcb}>, and C<\b{g}>.
-
-=back
-
-=head3 L<perlrequick>
-
-=over 4
-
-=item *
-
-Added example for C<\b{wb}>.
-
-=back
-
-=head3 L<perlretut>
-
-=over 4
-
-=item *
-
-Added example for C<\b{wb}>.
-
-=back
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlunicode>
-
-=over 4
-
-=item *
-
-Update B<Default Word Boundaries> under
-L<perlunicode/"Unicode Regular Expression Support Level">'s
-B<Extended Unicode Support>.
-
-=back
-
-=head3 L<perlunicook>
-
-=over 4
-
-=item *
-
-Clarify that autodie E<gt>= 2.26 works with C<use open>.
-
-=item *
-
-Correct warning message for C<use autodie> and C<use open>.
-
-=back
-
-=head3 L<perlfaq>
-
-=over 4
-
-=item *
-
-L<perlfaq> has been synchronized with version 5.021009 from CPAN.
-
-=back
-
-=head3 L<perlop>
-
-=over 4
-
-=item *
-
-Correct the version number which removes C<m?PATTERN?>. It was Perl 5.22.0.
-
-=back
-
-=head3 L<perlvar>
-
-=over 4
-
-=item *
-
-Further clarify version number representations and usage.
-
-=back
-
-=head3 L<perlmodstyle>
-
-=over 4
-
-=item *
-
-Instead of pointing to the module list, we are now pointing to
-L<PrePAN|http://prepan.org/>.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<'%s' is an unknown bound type in regex|perldiag/"'%s' is an unknown bound type in regex; marked by <-- HERE in m/%s/">
-
-You used C<\b{...}> or C<\B{...}> and the C<...> is not known to
-Perl. The current valid ones are given in
-L<perlrebackslash/\b{}, \b, \B{}, \B>.
-
-=item *
-
-L<Use of \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale|perldiag/"Use of \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale">
-
-You are matching a regular expression using locale rules,
-and a Unicode boundary is being matched, but the locale is not a Unicode
-one. This doesn't make sense. Perl will continue, assuming a Unicode
-(UTF-8) locale, but the results could well be wrong except if the locale
-happens to be ISO-8859-1 (Latin1) where this message is spurious and can
-be ignored.
-
-=item *
-
-L<< Using E<sol>u for '%s' instead of E<sol>%s in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Using E<sol>u for '%s' instead of E<sol>%s in regex; marked by <-- HERE in mE<sol>%sE<sol>" >>
-
-You used a Unicode boundary (C<\b{...}> or C<\B{...}>) in a
-portion of a regular expression where the character set modifiers C</a>
-or C</aa> are in effect. These two modifiers indicate an ASCII
-interpretation, and this doesn't make sense for a Unicode definition.
-The generated regular expression will compile so that the boundary uses
-all of Unicode. No other portion of the regular expression is affected.
-
-=item *
-
-L<The bitwise feature is experimental|perldiag/"The bitwise feature is experimental">
-
-This warning is emitted if you use bitwise
-operators (C<& | ^ ~ &. |. ^. ~.>) with the "bitwise" feature enabled.
-Simply suppress the warning if you want to use the feature, but know
-that in doing so you are taking the risk of using an experimental
-feature which may change or be removed in a future Perl version:
-
- no warnings "experimental::bitwise";
- use feature "bitwise";
- $x |.= $y;
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-B<Unusual use of %s in void context> has been removed. It might
-come back in a future release.
-
-=item *
-
-L<Argument "%s" isn't numeric%s|perldiag/"Argument "%s" isn't numeric%s">
-now adds the following note:
-
- Note that for the C<Inf> and C<NaN> (infinity and not-a-number) the
- definition of "numeric" is somewhat unusual: the strings themselves
- (like "Inf") are considered numeric, and anything following them is
- considered non-numeric.
-
-=item *
-
-B<Possible precedence problem on bitwise %c operator> reworded as
-L<Possible precedence problem on bitwise %s operator|perldiag/"Possible precedence problem on bitwise %s operator">.
-
-=back
-
-=head1 Utility Changes
-
-=head2 L<h2ph>
-
-=over 4
-
-=item *
-
-F<h2ph> now handles hexadecimal constants in the compiler's predefined
-macro definitions, as visible in C<$Config{cppsymbols}>. [rt.perl.org
-#123784]
-
-=back
-
-=head2 L<encguess>
-
-=over 4
-
-=item *
-
-No longer depends on non-core module anymore.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-F<Configure> now checks for F<lrintl>, F<lroundl>, F<llrintl>, and F<llroundl>.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-Added F<t/op/dump.t> for testing C<dump>.
-
-=back
-
-=head1 Deprecations
-
-=head2 Support for new warnings categories outside of "all"
-
-The new option for warnings outside the B<all> category in the L<warnings>
-pragma has been removed for now.
-
-For more context, you can refer to the following
-L<discussion thread|http://www.nntp.perl.org/group/perl.perl5.porters/2015/01/msg225066.html>.
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=head3 Win32
-
-=over 4
-
-=item *
-
-Perl can now be built in C++ mode on Windows by setting the makefile macro
-C<USE_CPLUSPLUS> to the value "define".
-
-=item *
-
-List form pipe open no longer falls back to the shell.
-
-=item *
-
-In release 5.21.8 compiling on VC with dmake was broken. Fixed.
-
-=item *
-
-New C<DebugSymbols> and C<DebugFull> configuration options added to
-Windows makefiles.
-
-=item *
-
-L<B> now compiles again on Windows.
-
-=back
-
-=head3 Solaris
-
-Look for the Sun Studio compiler in both F</opt/solstudio*> and
-F</opt/solarisstudio*>.
-
-=head3 VMS
-
-=over 4
-
-=item *
-
-When spawning a subprocess without waiting, the return value is now
-the correct PID.
-
-=item *
-
-Fix a prototype so linking doesn't fail under the VMS C++ compiler.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Patterns starting with C</.*/> are now fast again. [rt.perl.org #123743]
-
-=item *
-
-The original visible value of C<$/> is now preserved when it is set to
-an invalid value. Previously if you set C<$/> to a reference to an
-array, for example, perl would produce a runtime error and not set
-C<PL_rs>, but perl code that checked C<$/> would see the array
-reference. [rt.perl.org #123218]
-
-=item *
-
-In a regular expression pattern, a POSIX class, like C<[:ascii:]>, must
-be inside a bracketed character class, like C</qr[[:ascii:]]>. A
-warning is issued when something looking like a POSIX class is not
-inside a bracketed class. That warning wasn't getting generated when
-the POSIX class was negated: C<[:^ascii:]>. This is now fixed.
-
-=item *
-
-Fix a couple of other size calculation overflows. [rt.perl.org #123554]
-
-=item *
-
-A bug introduced in 5.21.6, C<dump LABEL> acted the same as C<goto
-LABEL>. This has been fixed. [rt.perl.org #123836]
-
-=item *
-
-Perl 5.14.0 introduced a bug whereby C<eval { LABEL: }> would crash. This
-has been fixed. [rt.perl.org #123652]
-
-=item *
-
-Various crashes due to the parser getting confused by syntax errors have
-been fixed. [rt.perl.org #123617] [rt.perl.org #123737]
-[rt.perl.org #123753] [rt.perl.org #123677]
-
-=item *
-
-Code like C</$a[/> used to read the next line of input and treat it as
-though it came immediately after the opening bracket. Some invalid code
-consequently would parse and run, but some code caused crashes, so this is
-now disallowed. [rt.perl.org #123712]
-
-=item *
-
-Fix argument underflow for C<pack>. [rt.perl.org #123874]
-
-=item *
-
-Fix handling of non-strict C<\x{}>. Now C<\x{}> is equivalent to C<\x{0}>
-instead of faulting.
-
-=item *
-
-C<stat -t> is now no longer treated as stackable, just like C<-t stat>.
-[rt.perl.org #123816]
-
-=item *
-
-The following no longer causes a SEGV: C<qr{x+(y(?0))*}>.
-
-=item *
-
-Fixed infinite loop in parsing backrefs in regexp patterns.
-
-=item *
-
-Several minor bug fixes in behavior of Inf and NaN, including
-warnings when stringifying Inf-like or NaN-like strings. For example,
-"NaNcy" doesn't numify to NaN anymore.
-
-=item *
-
-Only stringy classnames are now shared. This fixes some failures in L<autobox>. [rt.cpan.org #100819]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.21.9 represents approximately 4 weeks of development since Perl 5.21.8
-and contains approximately 170,000 lines of changes across 520 files from 32
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 160,000 lines of changes to 270 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.21.9:
-
-Chad Granum, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
-Mannsåker, Daniel Dragan, David Golden, David Mitchell, Father Chrysostomos,
-H.Merijn Brand, Hugo van der Sanden, James E Keenan, James Raspass, Jarkko
-Hietaniemi, Karen Etheridge, Karl Williamson, Kent Fredric, Lajos Veres, Leon
-Timmermans, Lukas Mai, Mathieu Arnold, Matthew Horsfall, Peter Martini, Petr
-Písař, Randy Stauner, Ricardo Signes, Sawyer X, Shlomi Fish, Sisyphus, Steve
-Hay, Tony Cook, Yves Orton, Ævar Arnfjörð Bjarmason.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
-
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
-
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-https://rt.perl.org/ . There may also be information at
-http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications, which make it
-inappropriate to send to a publicly archived mailing list, then please send it
-to perl5-security-report@perl.org. This points to a closed subscription
-unarchived mailing list, which includes all the core committers, who will be
-able to help assess the impact of issues, figure out a resolution, and help
-co-ordinate the release of patches to mitigate or fix the problem across all
-platforms on which Perl is supported. Please only use this address for
-security issues in the Perl core, not for modules independently distributed on
-CPAN.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
--- /dev/null
+=encoding utf8
+
+=head1 NAME
+
+perl5220delta - what is new for perl v5.22.0
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.20.0 release and the 5.22.0
+release.
+
+If you are upgrading from an earlier release such as 5.18.0, first read
+L<perl5200delta>, which describes differences between 5.18.0 and 5.20.0.
+
+=head1 Core Enhancements
+
+=head2 New bitwise operators
+
+A new experimental facility has been added that makes the four standard
+bitwise operators (C<& | ^ ~>) treat their operands consistently as
+numbers, and introduces four new dotted operators (C<&. |. ^. ~.>) that
+treat their operands consistently as strings. The same applies to the
+assignment variants (C<&= |= ^= &.= |.= ^.=>).
+
+To use this, enable the "bitwise" feature and disable the
+"experimental::bitwise" warnings category. See L<perlop/Bitwise String
+Operators> for details.
+L<[perl #123466]|https://rt.perl.org/Ticket/Display.html?id=123466>.
+
+=head2 New double-diamond operator
+
+C<<< <<>> >>> is like C<< <> >> but uses three-argument C<open> to open
+each file in C<@ARGV>. This means that each element of C<@ARGV> will be treated
+as an actual file name, and C<"|foo"> won't be treated as a pipe open.
+
+=head2 New C<\b> boundaries in regular expressions
+
+=head3 C<qr/\b{gcb}/>
+
+C<gcb> stands for Grapheme Cluster Boundary. It is a Unicode property
+that finds the boundary between sequences of characters that look like a
+single character to a native speaker of a language. Perl has long had
+the ability to deal with these through the C<\X> regular escape
+sequence. Now, there is an alternative way of handling these. See
+L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
+
+=head3 C<qr/\b{wb}/>
+
+C<wb> stands for Word Boundary. It is a Unicode property
+that finds the boundary between words. This is similar to the plain
+C<\b> (without braces) but is more suitable for natural language
+processing. It knows, for example, that apostrophes can occur in the
+middle of words. See L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
+
+=head3 C<qr/\b{sb}/>
+
+C<sb> stands for Sentence Boundary. It is a Unicode property
+to aid in parsing natural language sentences.
+See L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
+
+=head2 Non-Capturing Regular Expression Flag
+
+Regular expressions now support a C</n> flag that disables capturing
+and filling in C<$1>, C<$2>, etc inside of groups:
+
+ "hello" =~ /(hi|hello)/n; # $1 is not set
+
+This is equivalent to putting C<?:> at the beginning of every capturing group.
+
+See L<perlre/"n"> for more information.
+
+=head2 C<use re 'strict'>
+
+This applies stricter syntax rules to regular expression patterns
+compiled within its scope. This will hopefully alert you to typos and
+other unintentional behavior that backwards-compatibility issues prevent
+us from reporting in normal regular expression compilations. Because the
+behavior of this is subject to change in future Perl releases as we gain
+experience, using this pragma will raise a warning of category
+C<experimental::re_strict>.
+See L<'strict' in re|re/'strict' mode>.
+
+=head2 Unicode 7.0 (with correction) is now supported
+
+For details on what is in this release, see
+L<http://www.unicode.org/versions/Unicode7.0.0/>.
+The version of Unicode 7.0 that comes with Perl includes
+a correction dealing with glyph shaping in Arabic
+(see L<http://www.unicode.org/errata/#current_errata>).
+
+
+=head2 S<C<use locale>> can restrict which locale categories are affected
+
+It is now possible to pass a parameter to S<C<use locale>> to specify
+a subset of locale categories to be locale-aware, with the remaining
+ones unaffected. See L<perllocale/The "use locale" pragma> for details.
+
+=head2 Perl now supports POSIX 2008 locale currency additions
+
+On platforms that are able to handle POSIX.1-2008, the
+hash returned by
+L<C<POSIX::localeconv()>|perllocale/The localeconv function>
+includes the international currency fields added by that version of the
+POSIX standard. These are
+C<int_n_cs_precedes>,
+C<int_n_sep_by_space>,
+C<int_n_sign_posn>,
+C<int_p_cs_precedes>,
+C<int_p_sep_by_space>,
+and
+C<int_p_sign_posn>.
+
+=head2 Better heuristics on older platforms for determining locale UTF-8ness
+
+On platforms that implement neither the C99 standard nor the POSIX 2001
+standard, determining if the current locale is UTF-8 or not depends on
+heuristics. These are improved in this release.
+
+=head2 Aliasing via reference
+
+Variables and subroutines can now be aliased by assigning to a reference:
+
+ \$c = \$d;
+ \&x = \&y;
+
+Aliasing can also be accomplished
+by using a backslash before a C<foreach> iterator variable; this is
+perhaps the most useful idiom this feature provides:
+
+ foreach \%hash (@array_of_hash_refs) { ... }
+
+This feature is experimental and must be enabled via S<C<use feature
+'refaliasing'>>. It will warn unless the C<experimental::refaliasing>
+warnings category is disabled.
+
+See L<perlref/Assigning to References>
+
+=head2 C<prototype> with no arguments
+
+C<prototype()> with no arguments now infers C<$_>.
+L<[perl #123514]|https://rt.perl.org/Ticket/Display.html?id=123514>.
+
+=head2 New C<:const> subroutine attribute
+
+The C<const> attribute can be applied to an anonymous subroutine. It
+causes the new sub to be executed immediately whenever one is created
+(I<i.e.> when the C<sub> expression is evaluated). Its value is captured
+and used to create a new constant subroutine that is returned. This
+feature is experimental. See L<perlsub/Constant Functions>.
+
+=head2 C<fileno> now works on directory handles
+
+When the relevant support is available in the operating system, the
+C<fileno> builtin now works on directory handles, yielding the
+underlying file descriptor in the same way as for filehandles. On
+operating systems without such support, C<fileno> on a directory handle
+continues to return the undefined value, as before, but also sets C<$!> to
+indicate that the operation is not supported.
+
+Currently, this uses either a C<dd_fd> member in the OS C<DIR>
+structure, or a C<dirfd(3)> function as specified by POSIX.1-2008.
+
+=head2 List form of pipe open implemented for Win32
+
+The list form of pipe:
+
+ open my $fh, "-|", "program", @arguments;
+
+is now implemented on Win32. It has the same limitations as C<system
+LIST> on Win32, since the Win32 API doesn't accept program arguments
+as a list.
+
+=head2 Assignment to list repetition
+
+C<(...) x ...> can now be used within a list that is assigned to, as long
+as the left-hand side is a valid lvalue. This allows S<C<(undef,undef,$foo)
+= that_function()>> to be written as S<C<((undef)x2, $foo) = that_function()>>.
+
+=head2 Infinity and NaN (not-a-number) handling improved
+
+Floating point values are able to hold the special values infinity, negative
+infinity, and NaN (not-a-number). Now we more robustly recognize and
+propagate the value in computations, and on output normalize them to the strings
+C<Inf>, C<-Inf>, and C<NaN>.
+
+See also the L<POSIX> enhancements.
+
+=head2 Floating point parsing has been improved
+
+Parsing and printing of floating point values has been improved.
+
+As a completely new feature, hexadecimal floating point literals
+(like C<0x1.23p-4>) are now supported, and they can be output with
+S<C<printf "%a">>. See L<perldata/Scalar value constructors> for more
+details.
+
+=head2 Packing infinity or not-a-number into a character is now fatal
+
+Before, when trying to pack infinity or not-a-number into a
+(signed) character, Perl would warn, and assumed you tried to
+pack C<< 0xFF >>; if you gave it as an argument to C<< chr >>,
+C<< U+FFFD >> was returned.
+
+But now, all such actions (C<< pack >>, C<< chr >>, and C<< print '%c' >>)
+result in a fatal error.
+
+=head2 Experimental C Backtrace API
+
+Perl now supports (via a C level API) retrieving
+the C level backtrace (similar to what symbolic debuggers like gdb do).
+
+The backtrace returns the stack trace of the C call frames,
+with the symbol names (function names), the object names (like "perl"),
+and if it can, also the source code locations (file:line).
+
+The supported platforms are Linux and OS X (some *BSD might work at
+least partly, but they have not yet been tested).
+
+The feature needs to be enabled with C<Configure -Dusecbacktrace>.
+
+See L<perlhacktips/"C backtrace"> for more information.
+
+=head1 Security
+
+=head2 Perl is now compiled with C<-fstack-protector-strong> if available
+
+Perl has been compiled with the anti-stack-smashing option
+C<-fstack-protector> since 5.10.1. Now Perl uses the newer variant
+called C<-fstack-protector-strong>, if available.
+
+=head2 The L<Safe> module could allow outside packages to be replaced
+
+Critical bugfix: outside packages could be replaced. L<Safe> has
+been patched to 2.38 to address this.
+
+=head2 Perl is now always compiled with C<-D_FORTIFY_SOURCE=2> if available
+
+The 'code hardening' option called C<_FORTIFY_SOURCE>, available in
+gcc 4.*, is now always used for compiling Perl, if available.
+
+Note that this isn't necessarily a huge step since in many platforms
+the step had already been taken several years ago: many Linux
+distributions (like Fedora) have been using this option for Perl,
+and OS X has enforced the same for many years.
+
+=head1 Incompatible Changes
+
+=head2 Subroutine signatures moved before attributes
+
+The experimental sub signatures feature, as introduced in 5.20, parsed
+signatures after attributes. In this release, following feedback from users
+of the experimental feature, the positioning has been moved such that
+signatures occur after the subroutine name (if any) and before the attribute
+list (if any).
+
+=head2 C<&> and C<\&> prototypes accepts only subs
+
+The C<&> prototype character now accepts only anonymous subs (C<sub
+{...}>), things beginning with C<\&>, or an explicit C<undef>. Formerly
+it erroneously also allowed references to arrays, hashes, and lists.
+L<[perl #4539]|https://rt.perl.org/Ticket/Display.html?id=4539>.
+L<[perl #123062]|https://rt.perl.org/Ticket/Display.html?id=123062>.
+L<[perl #123062]|https://rt.perl.org/Ticket/Display.html?id=123475>.
+
+In addition, the C<\&> prototype was allowing subroutine calls, whereas
+now it only allows subroutines: C<&foo> is still permitted as an argument,
+while C<&foo()> and C<foo()> no longer are.
+L<[perl #77860]|https://rt.perl.org/Ticket/Display.html?id=77860>.
+
+=head2 C<use encoding> is now lexical
+
+The L<encoding> pragma's effect is now limited to lexical scope. This
+pragma is deprecated, but in the meantime, it could adversely affect
+unrelated modules that are included in the same program; this change
+fixes that.
+
+=head2 List slices returning empty lists
+
+List slices now return an empty list only if the original list was empty
+(or if there are no indices). Formerly, a list slice would return an empty
+list if all indices fell outside the original list; now it returns a list
+of C<undef> values in that case.
+L<[perl #114498]|https://rt.perl.org/Ticket/Display.html?id=114498>.
+
+=head2 C<\N{}> with a sequence of multiple spaces is now a fatal error
+
+E.g. S<C<\N{TOOE<nbsp>E<nbsp>MANY SPACES}>> or S<C<\N{TRAILING SPACE }>>.
+This has been deprecated since v5.18.
+
+=head2 S<C<use UNIVERSAL '...'>> is now a fatal error
+
+Importing functions from C<UNIVERSAL> has been deprecated since v5.12, and
+is now a fatal error. S<C<use UNIVERSAL>> without any arguments is still
+allowed.
+
+=head2 In double-quotish C<\cI<X>>, I<X> must now be a printable ASCII character
+
+In prior releases, failure to do this raised a deprecation warning.
+
+=head2 Splitting the tokens C<(?> and C<(*> in regular expressions is now a fatal compilation error.
+
+These had been deprecated since v5.18.
+
+=head2 C<qr/foo/x> now ignores all Unicode pattern white space
+
+The C</x> regular expression modifier allows the pattern to contain
+white space and comments (both of which are ignored) for improved
+readability. Until now, not all the white space characters that Unicode
+designates for this purpose were handled. The additional ones now
+recognized are:
+
+ U+0085 NEXT LINE
+ U+200E LEFT-TO-RIGHT MARK
+ U+200F RIGHT-TO-LEFT MARK
+ U+2028 LINE SEPARATOR
+ U+2029 PARAGRAPH SEPARATOR
+
+The use of these characters with C</x> outside bracketed character
+classes and when not preceded by a backslash has raised a deprecation
+warning since v5.18. Now they will be ignored.
+
+=head2 Comment lines within S<C<(?[ ])>> are now ended only by a C<\n>
+
+S<C<(?[ ])>> is an experimental feature, introduced in v5.18. It operates
+as if C</x> is always enabled. But there was a difference: comment
+lines (following a C<#> character) were terminated by anything matching
+C<\R> which includes all vertical whitespace, such as form feeds. For
+consistency, this is now changed to match what terminates comment lines
+outside S<C<(?[ ])>>, namely a C<\n> (even if escaped), which is the
+same as what terminates a heredoc string and formats.
+
+=head2 C<(?[...])> operators now follow standard Perl precedence
+
+This experimental feature allows set operations in regular expression patterns.
+Prior to this, the intersection operator had the same precedence as the other
+binary operators. Now it has higher precedence. This could lead to different
+outcomes than existing code expects (though the documentation has always noted
+that this change might happen, recommending fully parenthesizing the
+expressions). See L<perlrecharclass/Extended Bracketed Character Classes>.
+
+=head2 Omitting C<%> and C<@> on hash and array names is no longer permitted
+
+Really old Perl let you omit the C<@> on array names and the C<%> on hash
+names in some spots. This has issued a deprecation warning since Perl
+5.000, and is no longer permitted.
+
+=head2 C<"$!"> text is now in English outside the scope of C<use locale>
+
+Previously, the text, unlike almost everything else, always came out
+based on the current underlying locale of the program. (Also affected
+on some systems is C<"$^E">.) For programs that are unprepared to
+handle locale differences, this can cause garbage text to be displayed.
+It's better to display text that is translatable via some tool than
+garbage text which is much harder to figure out.
+
+=head2 C<"$!"> text will be returned in UTF-8 when appropriate
+
+The stringification of C<$!> and C<$^E> will have the UTF-8 flag set
+when the text is actually non-ASCII UTF-8. This will enable programs
+that are set up to be locale-aware to properly output messages in the
+user's native language. Code that needs to continue the 5.20 and
+earlier behavior can do the stringification within the scopes of both
+S<C<use bytes>> and S<C<use locale ":messages">>. Within these two
+scopes, no other Perl operations will
+be affected by locale; only C<$!> and C<$^E> stringification. The
+C<bytes> pragma causes the UTF-8 flag to not be set, just as in previous
+Perl releases. This resolves
+L<[perl #112208]|https://rt.perl.org/Ticket/Display.html?id=112208>.
+
+=head2 Support for C<?PATTERN?> without explicit operator has been removed
+
+The C<m?PATTERN?> construct, which allows matching a regex only once,
+previously had an alternative form that was written directly with a question
+mark delimiter, omitting the explicit C<m> operator. This usage has produced
+a deprecation warning since 5.14.0. It is now a syntax error, so that the
+question mark can be available for use in new operators.
+
+=head2 C<defined(@array)> and C<defined(%hash)> are now fatal errors
+
+These have been deprecated since v5.6.1 and have raised deprecation
+warnings since v5.16.
+
+=head2 Using a hash or an array as a reference are now fatal errors
+
+For example, C<< %foo->{"bar"} >> now causes a fatal compilation
+error. These have been deprecated since before v5.8, and have raised
+deprecation warnings since then.
+
+=head2 Changes to the C<*> prototype
+
+The C<*> character in a subroutine's prototype used to allow barewords to take
+precedence over most, but not all, subroutine names. It was never
+consistent and exhibited buggy behavior.
+
+Now it has been changed, so subroutines always take precedence over barewords,
+which brings it into conformity with similarly prototyped built-in functions:
+
+ sub splat(*) { ... }
+ sub foo { ... }
+ splat(foo); # now always splat(foo())
+ splat(bar); # still splat('bar') as before
+ close(foo); # close(foo())
+ close(bar); # close('bar')
+
+=head1 Deprecations
+
+=head2 Setting C<${^ENCODING}> to anything but C<undef>
+
+This variable allows Perl scripts to be written in an encoding other than
+ASCII or UTF-8. However, it affects all modules globally, leading
+to wrong answers and segmentation faults. New scripts should be written
+in UTF-8; old scripts should be converted to UTF-8, which is easily done
+with the L<piconv> utility.
+
+=head2 Use of non-graphic characters in single-character variable names
+
+The syntax for single-character variable names is more lenient than
+for longer variable names, allowing the one-character name to be a
+punctuation character or even invisible (a non-graphic). Perl v5.20
+deprecated the ASCII-range controls as such a name. Now, all
+non-graphic characters that formerly were allowed are deprecated.
+The practical effect of this occurs only when not under C<S<use
+utf8>>, and affects just the C1 controls (code points 0x80 through
+0xFF), NO-BREAK SPACE, and SOFT HYPHEN.
+
+=head2 Inlining of C<sub () { $var }> with observable side-effects
+
+In many cases Perl makes S<C<sub () { $var }>> into an inlinable constant
+subroutine, capturing the value of C<$var> at the time the C<sub> expression
+is evaluated. This can break the closure behavior in those cases where
+C<$var> is subsequently modified, since the subroutine won't return the
+changed value. (Note that this all only applies to anonymous subroutines
+with an empty prototype (S<C<sub ()>>).)
+
+This usage is now deprecated in those cases where the variable could be
+modified elsewhere. Perl detects those cases and emits a deprecation
+warning. Such code will likely change in the future and stop producing a
+constant.
+
+If your variable is only modified in the place where it is declared, then
+Perl will continue to make the sub inlinable with no warnings.
+
+ sub make_constant {
+ my $var = shift;
+ return sub () { $var }; # fine
+ }
+
+ sub make_constant_deprecated {
+ my $var;
+ $var = shift;
+ return sub () { $var }; # deprecated
+ }
+
+ sub make_constant_deprecated2 {
+ my $var = shift;
+ log_that_value($var); # could modify $var
+ return sub () { $var }; # deprecated
+ }
+
+In the second example above, detecting that C<$var> is assigned to only once
+is too hard to detect. That it happens in a spot other than the C<my>
+declaration is enough for Perl to find it suspicious.
+
+This deprecation warning happens only for a simple variable for the body of
+the sub. (A C<BEGIN> block or C<use> statement inside the sub is ignored,
+because it does not become part of the sub's body.) For more complex
+cases, such as S<C<sub () { do_something() if 0; $var }>> the behavior has
+changed such that inlining does not happen if the variable is modifiable
+elsewhere. Such cases should be rare.
+
+=head2 Use of multiple C</x> regexp modifiers
+
+It is now deprecated to say something like any of the following:
+
+ qr/foo/xx;
+ /(?xax:foo)/;
+ use re qw(/amxx);
+
+That is, now C<x> should only occur once in any string of contiguous
+regular expression pattern modifiers. We do not believe there are any
+occurrences of this in all of CPAN. This is in preparation for a future
+Perl release having C</xx> permit white-space for readability in
+bracketed character classes (those enclosed in square brackets:
+C<[...]>).
+
+=head2 Using a NO-BREAK space in a character alias for C<\N{...}> is now deprecated
+
+This non-graphic character is essentially indistinguishable from a
+regular space, and so should not be allowed. See
+L<charnames/CUSTOM ALIASES>.
+
+=head2 A literal C<"{"> should now be escaped in a pattern
+
+If you want a literal left curly bracket (also called a left brace) in a
+regular expression pattern, you should now escape it by either
+preceding it with a backslash (C<"\{">) or enclosing it within square
+brackets C<"[{]">, or by using C<\Q>; otherwise a deprecation warning
+will be raised. This was first announced as forthcoming in the v5.16
+release; it will allow future extensions to the language to happen.
+
+=head2 Making all warnings fatal is discouraged
+
+The documentation for L<fatal warnings|warnings/Fatal Warnings> notes that
+C<< use warnings FATAL => 'all' >> is discouraged, and provides stronger
+language about the risks of fatal warnings in general.
+
+=head1 Performance Enhancements
+
+=over 4
+
+=item *
+
+If a method or class name is known at compile time, a hash is precomputed
+to speed up run-time method lookup. Also, compound method names like
+C<SUPER::new> are parsed at compile time, to save having to parse them at
+run time.
+
+=item *
+
+Array and hash lookups (especially nested ones) that use only constants
+or simple variables as keys, are now considerably faster. See
+L</Internal Changes> for more details.
+
+=item *
+
+C<(...)x1>, C<("constant")x0> and C<($scalar)x0> are now optimised in list
+context. If the right-hand argument is a constant 1, the repetition
+operator disappears. If the right-hand argument is a constant 0, the whole
+expression is optimised to the empty list, so long as the left-hand
+argument is a simple scalar or constant. (That is, C<(foo())x0> is not
+subject to this optimisation.)
+
+=item *
+
+C<substr> assignment is now optimised into 4-argument C<substr> at the end
+of a subroutine (or as the argument to C<return>). Previously, this
+optimisation only happened in void context.
+
+=item *
+
+In C<"\L...">, C<"\Q...">, etc., the extra "stringify" op is now optimised
+away, making these just as fast as C<lcfirst>, C<quotemeta>, etc.
+
+=item *
+
+Assignment to an empty list is now sometimes faster. In particular, it
+never calls C<FETCH> on tied arguments on the right-hand side, whereas it
+used to sometimes.
+
+=item *
+
+There is a performance improvement of up to 20% when C<length> is applied to
+a non-magical, non-tied string, and either C<use bytes> is in scope or the
+string doesn't use UTF-8 internally.
+
+=item *
+
+On most perl builds with 64-bit integers, memory usage for non-magical,
+non-tied scalars containing only a floating point value has been reduced
+by between 8 and 32 bytes, depending on OS.
+
+=item *
+
+In C<@array = split>, the assignment can be optimized away, so that C<split>
+writes directly to the array. This optimisation was happening only for
+package arrays other than C<@_>, and only sometimes. Now this
+optimisation happens almost all the time.
+
+=item *
+
+C<join> is now subject to constant folding. So for example
+S<C<join "-", "a", "b">> is converted at compile-time to C<"a-b">.
+Moreover, C<join> with a scalar or constant for the separator and a
+single-item list to join is simplified to a stringification, and the
+separator doesn't even get evaluated.
+
+=item *
+
+C<qq(@array)> is implemented using two ops: a stringify op and a join op.
+If the C<qq> contains nothing but a single array, the stringification is
+optimized away.
+
+=item *
+
+S<C<our $var>> and S<C<our($s,@a,%h)>> in void context are no longer evaluated at
+run time. Even a whole sequence of S<C<our $foo;>> statements will simply be
+skipped over. The same applies to C<state> variables.
+
+=item *
+
+Many internal functions have been refactored to improve performance and reduce
+their memory footprints.
+L<[perl #121436]|https://rt.perl.org/Ticket/Display.html?id=121436>
+L<[perl #121906]|https://rt.perl.org/Ticket/Display.html?id=121906>
+L<[perl #121969]|https://rt.perl.org/Ticket/Display.html?id=121969>
+
+=item *
+
+C<-T> and C<-B> filetests will return sooner when an empty file is detected.
+L<[perl #121489]|https://rt.perl.org/Ticket/Display.html?id=121489>
+
+=item *
+
+Hash lookups where the key is a constant are faster.
+
+=item *
+
+Subroutines with an empty prototype and a body containing just C<undef> are now
+eligible for inlining.
+L<[perl #122728]|https://rt.perl.org/Ticket/Display.html?id=122728>
+
+=item *
+
+Subroutines in packages no longer need to be stored in typeglobs:
+declaring a subroutine will now put a simple sub reference directly in the
+stash if possible, saving memory. The typeglob still notionally exists,
+so accessing it will cause the stash entry to be upgraded to a typeglob
+(I<i.e.> this is just an internal implementation detail).
+This optimization does not currently apply to XSUBs or exported
+subroutines, and method calls will undo it, since they cache things in
+typeglobs.
+L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
+
+=item *
+
+The functions C<utf8::native_to_unicode()> and C<utf8::unicode_to_native()>
+(see L<utf8>) are now optimized out on ASCII platforms. There is now not even
+a minimal performance hit in writing code portable between ASCII and EBCDIC
+platforms.
+
+=item *
+
+Win32 Perl uses 8 KB less of per-process memory than before for every perl
+process, because some data is now memory mapped from disk and shared
+between processes from the same perl binary.
+
+=back
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+Many of the libraries distributed with perl have been upgraded since v5.20.0.
+For a complete list of changes, run:
+
+ corelist --diff 5.20.0 5.22.0
+
+You can substitute your favorite version in place of 5.20.0, too.
+
+Some notable changes include:
+
+=over 4
+
+=item *
+
+L<Archive::Tar> has been upgraded to version 2.04.
+
+Tests can now be run in parallel.
+
+=item *
+
+L<attributes> has been upgraded to version 0.27.
+
+The usage of C<memEQs> in the XS has been corrected.
+L<[perl #122701]|https://rt.perl.org/Ticket/Display.html?id=122701>
+
+Avoid reading beyond the end of a buffer. [perl #122629]
+
+=item *
+
+L<B> has been upgraded to version 1.58.
+
+It provides a new C<B::safename> function, based on the existing
+C<< B::GV->SAFENAME >>, that converts C<\cOPEN> to C<^OPEN>.
+
+Nulled COPs are now of class C<B::COP>, rather than C<B::OP>.
+
+C<B::REGEXP> objects now provide a C<qr_anoncv> method for accessing the
+implicit CV associated with C<qr//> things containing code blocks, and a
+C<compflags> method that returns the pertinent flags originating from the
+C<qr//blahblah> op.
+
+C<B::PMOP> now provides a C<pmregexp> method returning a C<B::REGEXP> object.
+Two new classes, C<B::PADNAME> and C<B::PADNAMELIST>, have been introduced.
+
+A bug where, after an ithread creation or psuedofork, special/immortal SVs in
+the child ithread/psuedoprocess did not have the correct class of
+C<B::SPECIAL>, has been fixed.
+The C<id> and C<outid> PADLIST methods have been added.
+
+=item *
+
+L<B::Concise> has been upgraded to version 0.996.
+
+Null ops that are part of the execution chain are now given sequence
+numbers.
+
+Private flags for nulled ops are now dumped with mnemonics as they would be
+for the non-nulled counterparts.
+
+=item *
+
+L<B::Deparse> has been upgraded to version 1.35.
+
+It now deparses C<+sub : attr { ... }> correctly at the start of a
+statement. Without the initial C<+>, C<sub> would be a statement label.
+
+C<BEGIN> blocks are now emitted in the right place most of the time, but
+the change unfortunately introduced a regression, in that C<BEGIN> blocks
+occurring just before the end of the enclosing block may appear below it
+instead.
+
+C<B::Deparse> no longer puts erroneous C<local> here and there, such as for
+C<LIST = tr/a//d>. [perl #119815]
+
+Adjacent C<use> statements are no longer accidentally nested if one
+contains a C<do> block. [perl #115066]
+
+Parenthesised arrays in lists passed to C<\> are now correctly deparsed
+with parentheses (I<e.g.>, C<\(@a, (@b), @c)> now retains the parentheses
+around @b), thus preserving the flattening behavior of referenced
+parenthesised arrays. Formerly, it only worked for one array: C<\(@a)>.
+
+C<local our> is now deparsed correctly, with the C<our> included.
+
+C<for($foo; !$bar; $baz) {...}> was deparsed without the C<!> (or C<not>).
+This has been fixed.
+
+Core keywords that conflict with lexical subroutines are now deparsed with
+the C<CORE::> prefix.
+
+C<foreach state $x (...) {...}> now deparses correctly with C<state> and
+not C<my>.
+
+C<our @array = split(...)> now deparses correctly with C<our> in those
+cases where the assignment is optimized away.
+
+It now deparses C<our(I<LIST>)> and typed lexical (C<my Dog $spot>) correctly.
+
+Deparse C<$#_> as that instead of as C<$#{_}>.
+L<[perl #123947]|https://rt.perl.org/Ticket/Display.html?id=123947>
+
+BEGIN blocks at the end of the enclosing scope are now deparsed in the
+right place. [perl #77452]
+
+BEGIN blocks were sometimes deparsed as __ANON__, but are now always called
+BEGIN.
+
+Lexical subroutines are now fully deparsed. [perl #116553]
+
+C<Anything =~ y///r> with C</r> no longer omits the left-hand operand.
+
+The op trees that make up regexp code blocks are now deparsed for real.
+Formerly, the original string that made up the regular expression was used.
+That caused problems with C<qr/(?{E<lt>E<lt>heredoc})/> and multiline code blocks,
+which were deparsed incorrectly. [perl #123217] [perl #115256]
+
+C<$;> at the end of a statement no longer loses its semicolon.
+[perl #123357]
+
+Some cases of subroutine declarations stored in the stash in shorthand form
+were being omitted.
+
+Non-ASCII characters are now consistently escaped in strings, instead of
+some of the time. (There are still outstanding problems with regular
+expressions and identifiers that have not been fixed.)
+
+When prototype sub calls are deparsed with C<&> (I<e.g.>, under the B<-P>
+option), C<scalar> is now added where appropriate, to force the scalar
+context implied by the prototype.
+
+C<require(foo())>, C<do(foo())>, C<goto(foo())> and similar constructs with
+loop controls are now deparsed correctly. The outer parentheses are not
+optional.
+
+Whitespace is no longer escaped in regular expressions, because it was
+getting erroneously escaped within C<(?x:...)> sections.
+
+C<sub foo { foo() }> is now deparsed with those mandatory parentheses.
+
+C</@array/> is now deparsed as a regular expression, and not just
+C<@array>.
+
+C</@{-}/>, C</@{+}/> and C<$#{1}> are now deparsed with the braces, which
+are mandatory in these cases.
+
+In deparsing feature bundles, C<B::Deparse> was emitting C<no feature;> first
+instead of C<no feature ':all';>. This has been fixed.
+
+C<chdir FH> is now deparsed without quotation marks.
+
+C<\my @a> is now deparsed without parentheses. (Parenthese would flatten
+the array.)
+
+C<system> and C<exec> followed by a block are now deparsed correctly.
+Formerly there was an erroneous C<do> before the block.
+
+C<< use constant QR =E<gt> qr/.../flags >> followed by C<"" =~ QR> is no longer
+without the flags.
+
+Deparsing C<BEGIN { undef &foo }> with the B<-w> switch enabled started to
+emit 'uninitialized' warnings in Perl 5.14. This has been fixed.
+
+Deparsing calls to subs with a C<(;+)> prototype resulted in an infinite
+loop. The C<(;$>) C<(_)> and C<(;_)> prototypes were given the wrong
+precedence, causing C<foo($aE<lt>$b)> to be deparsed without the parentheses.
+
+Deparse now provides a defined state sub in inner subs.
+
+=item *
+
+L<B::Op_private> has been added.
+
+L<B::Op_private> provides detailed information about the flags used in the
+C<op_private> field of perl opcodes.
+
+=item *
+
+L<bigint>, L<bignum>, L<bigrat> have been upgraded to version 0.39.
+
+Document in CAVEATS that using strings as numbers won't always invoke
+the big number overloading, and how to invoke it. [rt.perl.org #123064]
+
+=item *
+
+L<Carp> has been upgraded to version 1.36.
+
+C<Carp::Heavy> now ignores version mismatches with Carp if Carp is newer
+than 1.12, since C<Carp::Heavy>'s guts were merged into Carp at that
+point.
+L<[perl #121574]|https://rt.perl.org/Ticket/Display.html?id=121574>
+
+Carp now handles non-ASCII platforms better.
+
+Off-by-one error fix for Perl E<lt> 5.14.
+
+=item *
+
+L<constant> has been upgraded to version 1.33.
+
+It now accepts fully-qualified constant names, allowing constants to be defined
+in packages other than the caller.
+
+=item *
+
+L<CPAN> has been upgraded to version 2.11.
+
+Add support for C<Cwd::getdcwd()> and introduce workaround for a misbehavior
+seen on Strawberry Perl 5.20.1.
+
+Fix C<chdir()> after building dependencies bug.
+
+Introduce experimental support for plugins/hooks.
+
+Integrate the C<App::Cpan> sources.
+
+Do not check recursion on optional dependencies.
+
+Sanity check F<META.yml> to contain a hash.
+L<[cpan #95271]|https://rt.cpan.org/Ticket/Display.html?id=95271>
+
+=item *
+
+L<CPAN::Meta::Requirements> has been upgraded to version 2.132.
+
+Works around limitations in C<version::vpp> detecting v-string magic and adds
+support for forthcoming L<ExtUtils::MakeMaker> bootstrap F<version.pm> for
+Perls older than 5.10.0.
+
+=item *
+
+L<Data::Dumper> has been upgraded to version 2.158.
+
+Fixes CVE-2014-4330 by adding a configuration variable/option to limit
+recursion when dumping deep data structures.
+
+Changes to resolve Coverity issues.
+XS dumps incorrectly stored the name of code references stored in a
+GLOB.
+L<[perl #122070]|https://rt.perl.org/Ticket/Display.html?id=122070>
+
+=item *
+
+L<DynaLoader> has been upgraded to version 1.32.
+
+Remove C<dl_nonlazy> global if unused in Dynaloader. [perl #122926]
+
+=item *
+
+L<Encode> has been upgraded to version 2.72.
+
+C<piconv> now has better error handling when the encoding name is nonexistent,
+and a build breakage when upgrading L<Encode> in perl-5.8.2 and earlier has
+been fixed.
+
+Building in C++ mode on Windows now works.
+
+=item *
+
+L<Errno> has been upgraded to version 1.23.
+
+Add C<-P> to the preprocessor command-line on GCC 5. GCC added extra
+line directives, breaking parsing of error code definitions. [rt.perl.org
+#123784]
+
+=item *
+
+L<experimental> has been upgraded to version 0.013.
+
+Hardcodes features for Perls older than 5.15.7.
+
+=item *
+
+L<ExtUtils::CBuilder> has been upgraded to version 0.280221.
+
+Fixes a regression on Android.
+L<[perl #122675]|https://rt.perl.org/Ticket/Display.html?id=122675>
+
+=item *
+
+L<ExtUtils::Manifest> has been upgraded to version 1.70.
+
+Fixes a bug with C<maniread()>'s handling of quoted filenames and improves
+C<manifind()> to follow symlinks.
+L<[perl #122415]|https://rt.perl.org/Ticket/Display.html?id=122415>
+
+=item *
+
+L<ExtUtils::ParseXS> has been upgraded to version 3.28.
+
+Only declare C<file> unused if we actually define it.
+Improve generated C<RETVAL> code generation to avoid repeated
+references to C<ST(0)>. [perl #123278]
+Broaden and document the C</OBJ$/> to C</REF$/> typemap optimization
+for the C<DESTROY> method. [perl #123418]
+
+=item *
+
+L<Fcntl> has been upgraded to version 1.13.
+
+Add support for the Linux pipe buffer size C<fcntl()> commands.
+
+=item *
+
+L<File::Find> has been upgraded to version 1.29.
+
+C<find()> and C<finddepth()> will now warn if passed inappropriate or
+misspelled options.
+
+=item *
+
+L<File::Glob> has been upgraded to version 1.24.
+
+Avoid C<SvIV()> expanding to call C<get_sv()> three times in a few
+places. [perl #123606]
+
+=item *
+
+L<HTTP::Tiny> has been upgraded to version 0.054.
+
+C<keep_alive> is now fork-safe and thread-safe.
+
+=item *
+
+L<IO> has been upgraded to version 1.35.
+
+The XS implementation has been fixed for the sake of older Perls.
+
+=item *
+
+L<IO::Socket> has been upgraded to version 1.38.
+
+Document the limitations of the C<connected()> method. [perl #123096]
+
+=item *
+
+L<IO::Socket::IP> has been upgraded to version 0.37.
+
+A better fix for subclassing C<connect()>.
+L<[cpan #95983]|https://rt.cpan.org/Ticket/Display.html?id=95983>
+L<[cpan #97050]|https://rt.cpan.org/Ticket/Display.html?id=97050>
+
+Implements Timeout for C<connect()>.
+L<[cpan #92075]|https://rt.cpan.org/Ticket/Display.html?id=92075>
+
+=item *
+
+The libnet collection of modules has been upgraded to version 3.05.
+
+Support for IPv6 and SSL to C<Net::FTP>, C<Net::NNTP>, C<Net::POP3> and C<Net::SMTP>.
+Improvements in C<Net::SMTP> authentication.
+
+=item *
+
+L<Locale::Codes> has been upgraded to version 3.34.
+
+Fixed a bug in the scripts used to extract data from spreadsheets that
+prevented the SHP currency code from being found.
+L<[cpan #94229]|https://rt.cpan.org/Ticket/Display.html?id=94229>
+
+New codes have been added.
+
+=item *
+
+L<Math::BigInt> has been upgraded to version 1.9997.
+
+Synchronize POD changes from the CPAN release.
+C<< Math::BigFloat->blog(x) >> would sometimes return C<blog(2*x)> when
+the accuracy was greater than 70 digits.
+The result of C<< Math::BigFloat->bdiv() >> in list context now
+satisfies C<< x = quotient * divisor + remainder >>.
+
+Correct handling of subclasses.
+L<[cpan #96254]|https://rt.cpan.org/Ticket/Display.html?id=96254>
+L<[cpan #96329]|https://rt.cpan.org/Ticket/Display.html?id=96329>
+
+=item *
+
+L<Module::Metadata> has been upgraded to version 1.000026.
+
+Support installations on older perls with an L<ExtUtils::MakeMaker> earlier
+than 6.63_03
+
+=item *
+
+L<overload> has been upgraded to version 1.26.
+
+A redundant C<ref $sub> check has been removed.
+
+=item *
+
+The PathTools module collection has been upgraded to version 3.56.
+
+A warning from the B<gcc> compiler is now avoided when building the XS.
+
+Don't turn leading C<//> into C</> on Cygwin. [perl #122635]
+
+=item *
+
+L<perl5db.pl> has been upgraded to version 1.49.
+
+The debugger would cause an assertion failure.
+L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
+
+C<fork()> in the debugger under C<tmux> will now create a new window for
+the forked process. L<[perl
+#121333]|https://rt.perl.org/Ticket/Display.html?id=121333>
+
+The debugger now saves the current working directory on startup and
+restores it when you restart your program with C<R> or C<rerun>. L<[perl
+#121509]|https://rt.perl.org/Ticket/Display.html?id=121509>
+
+=item *
+
+L<PerlIO::scalar> has been upgraded to version 0.22.
+
+Reading from a position well past the end of the scalar now correctly
+returns end of file. [perl #123443]
+
+Seeking to a negative position still fails, but no longer leaves the
+file position set to a negation location.
+
+C<eof()> on a C<PerlIO::scalar> handle now properly returns true when
+the file position is past the 2GB mark on 32-bit systems.
+
+Attempting to write at file positions impossible for the platform now
+fail early rather than wrapping at 4GB.
+
+=item *
+
+L<Pod::Perldoc> has been upgraded to version 3.25.
+
+Filehandles opened for reading or writing now have C<:encoding(UTF-8)> set.
+L<[cpan #98019]|https://rt.cpan.org/Ticket/Display.html?id=98019>
+
+=item *
+
+L<POSIX> has been upgraded to version 1.53.
+
+The C99 math functions and constants (for example C<acosh>, C<isinf>, C<isnan>, C<round>,
+C<trunc>; C<M_E>, C<M_SQRT2>, C<M_PI>) have been added.
+
+C<POSIX::tmpnam()> now produces a deprecation warning. [perl #122005]
+
+=item *
+
+L<Safe> has been upgraded to version 2.39.
+
+C<reval> was not propagating void context properly.
+
+=item *
+
+Scalar-List-Utils has been upgraded to version 1.41.
+
+A new module, L<Sub::Util>, has been added, containing functions related to
+CODE refs, including C<subname> (inspired by C<Sub::Identity>) and C<set_subname>
+(copied and renamed from C<Sub::Name>).
+The use of C<GetMagic> in C<List::Util::reduce()> has also been fixed.
+L<[cpan #63211]|https://rt.cpan.org/Ticket/Display.html?id=63211>
+
+=item *
+
+L<SDBM_File> has been upgraded to version 1.13.
+
+Simplified the build process. [perl #123413]
+
+=item *
+
+L<Time::Piece> has been upgraded to version 1.29.
+
+When pretty printing negative C<Time::Seconds>, the "minus" is no longer lost.
+
+=item *
+
+L<Unicode::Collate> has been upgraded to version 1.12.
+
+Version 0.67's improved discontiguous contractions is invalidated by default
+and is supported as a parameter C<long_contraction>.
+
+=item *
+
+L<Unicode::Normalize> has been upgraded to version 1.18.
+
+The XSUB implementation has been removed in favor of pure Perl.
+
+=item *
+
+L<Unicode::UCD> has been upgraded to version 0.61.
+
+A new function L<property_values()|Unicode::UCD/prop_values()>
+has been added to return a given property's possible values.
+
+A new function L<charprop()|Unicode::UCD/charprop()>
+has been added to return the value of a given property for a given code
+point.
+
+A new function L<charprops_all()|Unicode::UCD/charprops_all()>
+has been added to return the values of all Unicode properties for a
+given code point.
+
+A bug has been fixed so that L<propaliases()|Unicode::UCD/prop_aliases()>
+returns the correct short and long names for the Perl extensions where
+it was incorrect.
+
+A bug has been fixed so that
+L<prop_value_aliases()|Unicode::UCD/prop_value_aliases()>
+returns C<undef> instead of a wrong result for properties that are Perl
+extensions.
+
+This module now works on EBCDIC platforms.
+
+=item *
+
+L<utf8> has been upgraded to version 1.17
+
+A mismatch between the documentation and the code in C<utf8::downgrade()>
+was fixed in favor of the documentation. The optional second argument
+is now correctly treated as a perl boolean (true/false semantics) and
+not as an integer.
+
+=item *
+
+L<version> has been upgraded to version 0.9909.
+
+Numerous changes. See the F<Changes> file in the CPAN distribution for
+details.
+
+=item *
+
+L<Win32> has been upgraded to version 0.51.
+
+C<GetOSName()> now supports Windows 8.1, and building in C++ mode now works.
+
+=item *
+
+L<Win32API::File> has been upgraded to version 0.1202
+
+Building in C++ mode now works.
+
+=item *
+
+L<XSLoader> has been upgraded to version 0.20.
+
+Allow XSLoader to load modules from a different namespace.
+[perl #122455]
+
+=back
+
+=head2 Removed Modules and Pragmata
+
+The following modules (and associated modules) have been removed from the core
+perl distribution:
+
+=over 4
+
+=item *
+
+L<CGI>
+
+=item *
+
+L<Module::Build>
+
+=back
+
+=head1 Documentation
+
+=head2 New Documentation
+
+=head3 L<perlunicook>
+
+This document, by Tom Christiansen, provides examples of handling Unicode in
+Perl.
+
+=head2 Changes to Existing Documentation
+
+=head3 L<perlaix>
+
+=over 4
+
+=item *
+
+A note on long doubles has been added.
+
+=back
+
+
+=head3 L<perlapi>
+
+=over 4
+
+=item *
+
+Note that C<SvSetSV> doesn't do set magic.
+
+=item *
+
+C<sv_usepvn_flags> - fix documentation to mention the use of C<Newx> instead of
+C<malloc>.
+
+L<[perl #121869]|https://rt.perl.org/Ticket/Display.html?id=121869>
+
+=item *
+
+Clarify where C<NUL> may be embedded or is required to terminate a string.
+
+=item *
+
+Some documentation that was previously missing due to formatting errors is
+now included.
+
+=item *
+
+Entries are now organized into groups rather than by the file where they
+are found.
+
+=item *
+
+Alphabetical sorting of entries is now done consistently (automatically
+by the POD generator) to make entries easier to find when scanning.
+
+=back
+
+=head3 L<perldata>
+
+=over 4
+
+=item *
+
+The syntax of single-character variable names has been brought
+up-to-date and more fully explained.
+
+=item *
+
+Hexadecimal floating point numbers are described, as are infinity and
+NaN.
+
+=back
+
+=head3 L<perlebcdic>
+
+=over 4
+
+=item *
+
+This document has been significantly updated in the light of recent
+improvements to EBCDIC support.
+
+=back
+
+=head3 L<perlfilter>
+
+=over 4
+
+=item *
+
+Added a L<LIMITATIONS|perlfilter/LIMITATIONS> section.
+
+=back
+
+
+=head3 L<perlfunc>
+
+=over 4
+
+=item *
+
+Mention that C<study()> is currently a no-op.
+
+=item *
+
+Calling C<delete> or C<exists> on array values is now described as "strongly
+discouraged" rather than "deprecated".
+
+=item *
+
+Improve documentation of C<< our >>.
+
+=item *
+
+C<-l> now notes that it will return false if symlinks aren't supported by the
+file system.
+L<[perl #121523]|https://rt.perl.org/Ticket/Display.html?id=121523>
+
+=item *
+
+Note that C<exec LIST> and C<system LIST> may fall back to the shell on
+Win32. Only the indirect-object syntax C<exec PROGRAM LIST> and
+C<system PROGRAM LIST> will reliably avoid using the shell.
+
+This has also been noted in L<perlport>.
+
+L<[perl #122046]|https://rt.perl.org/Ticket/Display.html?id=122046>
+
+=back
+
+=head3 L<perlguts>
+
+=over 4
+
+=item *
+
+The OOK example has been updated to account for COW changes and a change in the
+storage of the offset.
+
+=item *
+
+Details on C level symbols and libperl.t added.
+
+=item *
+
+Information on Unicode handling has been added
+
+=item *
+
+Information on EBCDIC handling has been added
+
+=back
+
+=head3 L<perlhack>
+
+=over 4
+
+=item *
+
+A note has been added about running on platforms with non-ASCII
+character sets
+
+=item *
+
+A note has been added about performance testing
+
+=back
+
+=head3 L<perlhacktips>
+
+=over 4
+
+=item *
+
+Documentation has been added illustrating the perils of assuming that
+there is no change to the contents of static memory pointed to by the
+return values of Perl's wrappers for C library functions.
+
+=item *
+
+Replacements for C<tmpfile>, C<atoi>, C<strtol>, and C<strtoul> are now
+recommended.
+
+=item *
+
+Updated documentation for the C<test.valgrind> C<make> target.
+L<[perl #121431]|https://rt.perl.org/Ticket/Display.html?id=121431>
+
+=item *
+
+Information is given about writing test files portably to non-ASCII
+platforms.
+
+=item *
+
+A note has been added about how to get a C language stack backtrace.
+
+=back
+
+=head3 L<perlhpux>
+
+=over 4
+
+=item *
+
+Note that the message "Redeclaration of "sendpath" with a different
+storage class specifier" is harmless.
+
+=back
+
+=head3 L<perllocale>
+
+=over 4
+
+=item *
+
+Updated for the enhancements in v5.22, along with some clarifications.
+
+=back
+
+=head3 L<perlmodstyle>
+
+=over 4
+
+=item *
+
+Instead of pointing to the module list, we are now pointing to
+L<PrePAN|http://prepan.org/>.
+
+=back
+
+=head3 L<perlop>
+
+=over 4
+
+=item *
+
+Updated for the enhancements in v5.22, along with some clarifications.
+
+=back
+
+=head3 L<perlpodspec>
+
+=over 4
+
+=item *
+
+The specification of the pod language is changing so that the default
+encoding of pods that aren't in UTF-8 (unless otherwise indicated) is
+CP1252 instead of ISO 8859-1 (Latin1).
+
+=back
+
+=head3 L<perlpolicy>
+
+=over 4
+
+=item *
+
+We now have a code of conduct for the I<< p5p >> mailing list, as documented
+in L<< perlpolicy/STANDARDS OF CONDUCT >>.
+
+=item *
+
+The conditions for marking an experimental feature as non-experimental are now
+set out.
+
+=item *
+
+Clarification has been made as to what sorts of changes are permissible in
+maintenance releases.
+
+=back
+
+=head3 L<perlport>
+
+=over 4
+
+=item *
+
+Out-of-date VMS-specific information has been fixed and/or simplified.
+
+=item *
+
+Notes about EBCDIC have been added.
+
+=back
+
+=head3 L<perlre>
+
+=over 4
+
+=item *
+
+The description of the C</x> modifier has been clarified to note that
+comments cannot be continued onto the next line by escaping them; and
+there is now a list of all the characters that are considered whitespace
+by this modifier.
+
+=item *
+
+The new C</n> modifier is described.
+
+=item *
+
+A note has been added on how to make bracketed character class ranges
+portable to non-ASCII machines.
+
+=back
+
+=head3 L<perlrebackslash>
+
+=over 4
+
+=item *
+
+Added documentation of C<\b{sb}>, C<\b{wb}>, C<\b{gcb}>, and C<\b{g}>.
+
+=back
+
+=head3 L<perlrecharclass>
+
+=over 4
+
+=item *
+
+Clarifications have been added to L<perlrecharclass/Character Ranges>
+to the effect C<[A-Z]>, C<[a-z]>, C<[0-9]> and
+any subranges thereof in regular expression bracketed character classes
+are guaranteed to match exactly what a naive English speaker would
+expect them to match, even on platforms (such as EBCDIC) where perl
+has to do extra work to accomplish this.
+
+=item *
+
+The documentation of Bracketed Character Classes has been expanded to cover the
+improvements in C<qr/[\N{named sequence}]/> (see under L</Selected Bug Fixes>).
+
+=back
+
+=head3 L<perlref>
+
+=over 4
+
+=item *
+
+A new section has been added
+L<Assigning to References|perlref/Assigning to References>
+
+=back
+
+=head3 L<perlsec>
+
+=over 4
+
+=item *
+
+Comments added on algorithmic complexity and tied hashes.
+
+=back
+
+=head3 L<perlsyn>
+
+=over 4
+
+=item *
+
+An ambiguity in the documentation of the C<...> statement has been corrected.
+L<[perl #122661]|https://rt.perl.org/Ticket/Display.html?id=122661>
+
+=item *
+
+The empty conditional in C<< for >> and C<< while >> is now documented
+in L<< perlsyn >>.
+
+=back
+
+=head3 L<perlunicode>
+
+=over 4
+
+=item *
+
+This has had extensive revisions to bring it up-to-date with current
+Unicode support and to make it more readable. Notable is that Unicode
+7.0 changed what it should do with non-characters. Perl retains the old
+way of handling for reasons of backward compatibility. See
+L<perlunicode/Noncharacter code points>.
+
+=back
+
+=head3 L<perluniintro>
+
+=over 4
+
+=item *
+
+Advice for how to make sure your strings and regular expression patterns are
+interpreted as Unicode has been updated.
+
+=back
+
+=head3 L<perlvar>
+
+=over 4
+
+=item *
+
+C<$]> is no longer listed as being deprecated. Instead, discussion has
+been added on the advantages and disadvantages of using it versus
+C<$^V>. C<$OLD_PERL_VERSION> was re-added to the documentation as the long
+form of C<$]>.
+
+=item *
+
+C<${^ENCODING}> is now marked as deprecated.
+
+=item *
+
+The entry for C<%^H> has been clarified to indicate it can only handle
+simple values.
+
+=back
+
+=head3 L<perlvms>
+
+=over 4
+
+=item *
+
+Out-of-date and/or incorrect material has been removed.
+
+=item *
+
+Updated documentation on environment and shell interaction in VMS.
+
+=back
+
+=head3 L<perlxs>
+
+=over 4
+
+=item *
+
+Added a discussion of locale issues in XS code.
+
+=back
+
+=head1 Diagnostics
+
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages. For the complete list of
+diagnostic messages, see L<perldiag>.
+
+=head2 New Diagnostics
+
+=head3 New Errors
+
+=over 4
+
+=item *
+
+L<Bad symbol for scalar|perldiag/"Bad symbol for scalar">
+
+(P) An internal request asked to add a scalar entry to something that
+wasn't a symbol table entry.
+
+=item *
+
+L<Can't use a hash as a reference|perldiag/"Can't use a hash as a reference">
+
+(F) You tried to use a hash as a reference, as in
+C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl E<lt>= 5.6.1
+used to allow this syntax, but shouldn't have.
+
+=item *
+
+L<Can't use an array as a reference|perldiag/"Can't use an array as a reference">
+
+(F) You tried to use an array as a reference, as in
+C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl E<lt>= 5.6.1 used to
+allow this syntax, but shouldn't have.
+
+=item *
+
+L<Can't use 'defined(@array)' (Maybe you should just omit the defined()?)|perldiag/"Can't use 'defined(@array)' (Maybe you should just omit the defined()?)">
+
+(F) C<defined()> is not useful on arrays because it
+checks for an undefined I<scalar> value. If you want to see if the
+array is empty, just use S<C<if (@array) { # not empty }>> for example.
+
+=item *
+
+L<Can't use 'defined(%hash)' (Maybe you should just omit the defined()?)|perldiag/"Can't use 'defined(%hash)' (Maybe you should just omit the defined()?)">
+
+(F) C<defined()> is not usually right on hashes.
+
+Although S<C<defined %hash>> is false on a plain not-yet-used hash, it
+becomes true in several non-obvious circumstances, including iterators,
+weak references, stash names, even remaining true after S<C<undef %hash>>.
+These things make S<C<defined %hash>> fairly useless in practice, so it now
+generates a fatal error.
+
+If a check for non-empty is what you wanted then just put it in boolean
+context (see L<perldata/Scalar values>):
+
+ if (%hash) {
+ # not empty
+ }
+
+If you had S<C<defined %Foo::Bar::QUUX>> to check whether such a package
+variable exists then that's never really been reliable, and isn't
+a good way to enquire about the features of a package, or whether
+it's loaded, etc.
+
+=item *
+
+L<Cannot chr %f|perldiag/"Cannot chr %f">
+
+(F) You passed an invalid number (like an infinity or not-a-number) to
+C<chr>.
+
+=item *
+
+L<Cannot compress %f in pack|perldiag/"Cannot compress %f in pack">
+
+(F) You tried converting an infinity or not-a-number to an unsigned
+character, which makes no sense.
+
+=item *
+
+L<Cannot pack %f with '%c'|perldiag/"Cannot pack %f with '%c'">
+
+(F) You tried converting an infinity or not-a-number to a character,
+which makes no sense.
+
+=item *
+
+L<Cannot print %f with '%c'|perldiag/"Cannot printf %f with '%c'">
+
+(F) You tried printing an infinity or not-a-number as a character (C<%c>),
+which makes no sense. Maybe you meant C<'%s'>, or just stringifying it?
+
+=item *
+
+L<charnames alias definitions may not contain a sequence of multiple spaces|perldiag/"charnames alias definitions may not contain a sequence of multiple spaces">
+
+(F) You defined a character name which had multiple space
+characters in a row. Change them to single spaces. Usually these
+names are defined in the C<:alias> import argument to C<use charnames>, but
+they could be defined by a translator installed into C<$^H{charnames}>.
+See L<charnames/CUSTOM ALIASES>.
+
+=item *
+
+L<charnames alias definitions may not contain trailing white-space|perldiag/"charnames alias definitions may not contain trailing white-space">
+
+(F) You defined a character name which ended in a space
+character. Remove the trailing space(s). Usually these names are
+defined in the C<:alias> import argument to C<use charnames>, but they
+could be defined by a translator installed into C<$^H{charnames}>.
+See L<charnames/CUSTOM ALIASES>.
+
+=item *
+
+L<:const is not permitted on named subroutines|perldiag/":const is not permitted on named subroutines">
+
+(F) The C<const> attribute causes an anonymous subroutine to be run and
+its value captured at the time that it is cloned. Named subroutines are
+not cloned like this, so the attribute does not make sense on them.
+
+=item *
+
+L<Hexadecimal float: internal error|perldiag/"Hexadecimal float: internal error">
+
+(F) Something went horribly bad in hexadecimal float handling.
+
+=item *
+
+L<Hexadecimal float: unsupported long double format|perldiag/"Hexadecimal float: unsupported long double format">
+
+(F) You have configured Perl to use long doubles but
+the internals of the long double format are unknown,
+therefore the hexadecimal float output is impossible.
+
+=item *
+
+L<Illegal suidscript|perldiag/"Illegal suidscript">
+
+(F) The script run under suidperl was somehow illegal.
+
+=item *
+
+L<In '(?...)', the '(' and '?' must be adjacent in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"In '(?...)', the '(' and '?' must be adjacent in regex; marked by <-- HERE in m/%s/">
+
+(F) The two-character sequence C<"(?"> in
+this context in a regular expression pattern should be an
+indivisible token, with nothing intervening between the C<"(">
+and the C<"?">, but you separated them.
+
+=item *
+
+L<In '(*VERB...)', the '(' and '*' must be adjacent in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"In '(*VERB...)', the '(' and '*' must be adjacent in regex; marked by <-- HERE in m/%s/">
+
+(F) The two-character sequence C<"(*"> in
+this context in a regular expression pattern should be an
+indivisible token, with nothing intervening between the C<"(">
+and the C<"*">, but you separated them.
+
+=item *
+
+L<Invalid quantifier in {,} in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Invalid quantifier in {,} in regex; marked by <-- HERE in m/%s/">
+
+(F) The pattern looks like a {min,max} quantifier, but the min or max could not
+be parsed as a valid number: either it has leading zeroes, or it represents
+too big a number to cope with. The S<<-- HERE> shows where in the regular
+expression the problem was discovered. See L<perlre>.
+
+=item *
+
+L<'%s' is an unknown bound type in regex|perldiag/"'%s' is an unknown bound type in regex; marked by <-- HERE in m/%s/">
+
+(F) You used C<\b{...}> or C<\B{...}> and the C<...> is not known to
+Perl. The current valid ones are given in
+L<perlrebackslash/\b{}, \b, \B{}, \B>.
+
+=item *
+
+L<Missing or undefined argument to require|perldiag/Missing or undefined argument to require>
+
+(F) You tried to call C<require> with no argument or with an undefined
+value as an argument. C<require> expects either a package name or a
+file-specification as an argument. See L<perlfunc/require>.
+
+Formerly, C<require> with no argument or C<undef> warned about a Null filename.
+
+=back
+
+=head3 New Warnings
+
+=over 4
+
+=item *
+
+L<\C is deprecated in regex|perldiag/"\C is deprecated in regex; marked by <-- HERE in m/%s/">
+
+(D deprecated) The C<< /\C/ >> character class was deprecated in v5.20, and
+now emits a warning. It is intended that it will become an error in v5.24.
+This character class matches a single byte even if it appears within a
+multi-byte character, breaks encapsulation, and can corrupt UTF-8
+strings.
+
+=item *
+
+L<"%s" is more clearly written simply as "%s" in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"%s" is more clearly written simply as "%s" in regex; marked by <-- HERE in mE<sol>%sE<sol>>
+
+(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
+
+You specified a character that has the given plainer way of writing it,
+and which is also portable to platforms running with different character
+sets.
+
+=item *
+
+L<Argument "%s" treated as 0 in increment (++)|perldiag/"Argument "%s" treated
+as 0 in increment (++)">
+
+(W numeric) The indicated string was fed as an argument to the C<++> operator
+which expects either a number or a string matching C</^[a-zA-Z]*[0-9]*\z/>.
+See L<perlop/Auto-increment and Auto-decrement> for details.
+
+=item *
+
+L<Both or neither range ends should be Unicode in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Both or neither range ends should be Unicode in regex; marked by <-- HERE in m/%s/">
+
+(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
+
+In a bracketed character class in a regular expression pattern, you
+had a range which has exactly one end of it specified using C<\N{}>, and
+the other end is specified using a non-portable mechanism. Perl treats
+the range as a Unicode range, that is, all the characters in it are
+considered to be the Unicode characters, and which may be different code
+points on some platforms Perl runs on. For example, C<[\N{U+06}-\x08]>
+is treated as if you had instead said C<[\N{U+06}-\N{U+08}]>, that is it
+matches the characters whose code points in Unicode are 6, 7, and 8.
+But that C<\x08> might indicate that you meant something different, so
+the warning gets raised.
+
+=item *
+
+L<Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".|perldiag/Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".>
+
+(W locale) You are 1) running under "C<use locale>"; 2) the current
+locale is not a UTF-8 one; 3) you tried to do the designated case-change
+operation on the specified Unicode character; and 4) the result of this
+operation would mix Unicode and locale rules, which likely conflict.
+
+The warnings category C<locale> is new.
+
+=item *
+
+L<:const is experimental|perldiag/":const is experimental">
+
+(S experimental::const_attr) The C<const> attribute is experimental.
+If you want to use the feature, disable the warning with C<no warnings
+'experimental::const_attr'>, but know that in doing so you are taking
+the risk that your code may break in a future Perl version.
+
+=item *
+
+L<gmtime(%f) failed|perldiag/"gmtime(%f) failed">
+
+(W overflow) You called C<gmtime> with a number that it could not handle:
+too large, too small, or NaN. The returned value is C<undef>.
+
+=item *
+
+L<Hexadecimal float: exponent overflow|perldiag/"Hexadecimal float: exponent overflow">
+
+(W overflow) The hexadecimal floating point has larger exponent
+than the floating point supports.
+
+=item *
+
+L<Hexadecimal float: exponent underflow|perldiag/"Hexadecimal float: exponent underflow">
+
+(W overflow) The hexadecimal floating point has smaller exponent
+than the floating point supports.
+
+=item *
+
+L<Hexadecimal float: mantissa overflow|perldiag/"Hexadecimal float: mantissa overflow">
+
+(W overflow) The hexadecimal floating point literal had more bits in
+the mantissa (the part between the C<0x> and the exponent, also known as
+the fraction or the significand) than the floating point supports.
+
+=item *
+
+L<Hexadecimal float: precision loss|perldiag/"Hexadecimal float: precision loss">
+
+(W overflow) The hexadecimal floating point had internally more
+digits than could be output. This can be caused by unsupported
+long double formats, or by 64-bit integers not being available
+(needed to retrieve the digits under some configurations).
+
+=item *
+
+L<Locale '%s' may not work well.%s|perldiag/Locale '%s' may not work well.%s>
+
+(W locale) You are using the named locale, which is a non-UTF-8 one, and
+which perl has determined is not fully compatible with what it can
+handle. The second C<%s> gives a reason.
+
+The warnings category C<locale> is new.
+
+=item *
+
+L<localtime(%f) failed|perldiag/"localtime(%f) failed">
+
+(W overflow) You called C<localtime> with a number that it could not handle:
+too large, too small, or NaN. The returned value is C<undef>.
+
+=item *
+
+L<Negative repeat count does nothing|perldiag/"Negative repeat count does nothing">
+
+(W numeric) You tried to execute the
+L<C<x>|perlop/Multiplicative Operators> repetition operator fewer than 0
+times, which doesn't make sense.
+
+=item *
+
+L<NO-BREAK SPACE in a charnames alias definition is deprecated|perldiag/"NO-BREAK SPACE in a charnames alias definition is deprecated">
+
+(D deprecated) You defined a character name which contained a no-break
+space character. Change it to a regular space. Usually these names are
+defined in the C<:alias> import argument to C<use charnames>, but they
+could be defined by a translator installed into C<$^H{charnames}>. See
+L<charnames/CUSTOM ALIASES>.
+
+=item *
+
+L<Non-finite repeat count does nothing|perldiag/"Non-finite repeat count does nothing">
+
+(W numeric) You tried to execute the
+L<C<x>|perlop/Multiplicative Operators> repetition operator C<Inf> (or
+C<-Inf>) or NaN times, which doesn't make sense.
+
+=item *
+
+L<PerlIO layer ':win32' is experimental|perldiag/"PerlIO layer ':win32' is experimental">
+
+(S experimental::win32_perlio) The C<:win32> PerlIO layer is
+experimental. If you want to take the risk of using this layer,
+simply disable this warning:
+
+ no warnings "experimental::win32_perlio";
+
+=item *
+
+L<Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by <-- HERE in mE<sol>%sE<sol>">
+
+(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
+
+Stricter rules help to find typos and other errors. Perhaps you didn't
+even intend a range here, if the C<"-"> was meant to be some other
+character, or should have been escaped (like C<"\-">). If you did
+intend a range, the one that was used is not portable between ASCII and
+EBCDIC platforms, and doesn't have an obvious meaning to a casual
+reader.
+
+ [3-7] # OK; Obvious and portable
+ [d-g] # OK; Obvious and portable
+ [A-Y] # OK; Obvious and portable
+ [A-z] # WRONG; Not portable; not clear what is meant
+ [a-Z] # WRONG; Not portable; not clear what is meant
+ [%-.] # WRONG; Not portable; not clear what is meant
+ [\x41-Z] # WRONG; Not portable; not obvious to non-geek
+
+(You can force portability by specifying a Unicode range, which means that
+the endpoints are specified by
+L<C<\N{...}>|perlrecharclass/Character Ranges>, but the meaning may
+still not be obvious.)
+The stricter rules require that ranges that start or stop with an ASCII
+character that is not a control have all their endpoints be a literal
+character, and not some escape sequence (like C<"\x41">), and the ranges
+must be all digits, or all uppercase letters, or all lowercase letters.
+
+=item *
+
+L<Ranges of digits should be from the same group in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of digits should be from the same group in regex; marked by <-- HERE in m/%s/">
+
+(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
+
+Stricter rules help to find typos and other errors. You included a
+range, and at least one of the end points is a decimal digit. Under the
+stricter rules, when this happens, both end points should be digits in
+the same group of 10 consecutive digits.
+
+=item *
+
+L<Redundant argument in %s|perldiag/Redundant argument in %s>
+
+(W redundant) You called a function with more arguments than were
+needed, as indicated by information within other arguments you supplied
+(I<e.g>. a printf format). Currently only emitted when a printf-type format
+required fewer arguments than were supplied, but might be used in the
+future for I<e.g.> L<perlfunc/pack>.
+
+The warnings category C<< redundant >> is new. See also
+L<[perl #121025]|https://rt.perl.org/Ticket/Display.html?id=121025>.
+
+=item *
+
+L<Replacement list is longer than search list|perldiag/Replacement list is longer than search list>
+
+This is not a new diagnostic, but in earlier releases was accidentally
+not displayed if the transliteration contained wide characters. This is
+now fixed, so that you may see this diagnostic in places where you
+previously didn't (but should have).
+
+=item *
+
+L<Use of \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale|perldiag/"Use of \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale">
+
+(W locale) You are matching a regular expression using locale rules,
+and a Unicode boundary is being matched, but the locale is not a Unicode
+one. This doesn't make sense. Perl will continue, assuming a Unicode
+(UTF-8) locale, but the results could well be wrong except if the locale
+happens to be ISO-8859-1 (Latin1) where this message is spurious and can
+be ignored.
+
+The warnings category C<locale> is new.
+
+=item *
+
+L<< Using E<sol>u for '%s' instead of E<sol>%s in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Using E<sol>u for '%s' instead of E<sol>%s in regex; marked by <-- HERE in mE<sol>%sE<sol>" >>
+
+(W regexp) You used a Unicode boundary (C<\b{...}> or C<\B{...}>) in a
+portion of a regular expression where the character set modifiers C</a>
+or C</aa> are in effect. These two modifiers indicate an ASCII
+interpretation, and this doesn't make sense for a Unicode definition.
+The generated regular expression will compile so that the boundary uses
+all of Unicode. No other portion of the regular expression is affected.
+
+=item *
+
+L<The bitwise feature is experimental|perldiag/"The bitwise feature is experimental">
+
+(S experimental::bitwise) This warning is emitted if you use bitwise
+operators (C<& | ^ ~ &. |. ^. ~.>) with the "bitwise" feature enabled.
+Simply suppress the warning if you want to use the feature, but know
+that in doing so you are taking the risk of using an experimental
+feature which may change or be removed in a future Perl version:
+
+ no warnings "experimental::bitwise";
+ use feature "bitwise";
+ $x |.= $y;
+
+=item *
+
+L<Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/%s/">
+
+(D deprecated, regexp) You used a literal C<"{"> character in a regular
+expression pattern. You should change to use C<"\{"> instead, because a future
+version of Perl (tentatively v5.26) will consider this to be a syntax error. If
+the pattern delimiters are also braces, any matching right brace
+(C<"}">) should also be escaped to avoid confusing the parser, for
+example,
+
+ qr{abc\{def\}ghi}
+
+=item *
+
+L<Use of literal non-graphic characters in variable names is deprecated|perldiag/"Use of literal non-graphic characters in variable names is deprecated">
+
+(D deprecated) Using literal non-graphic (including control)
+characters in the source to refer to the I<^FOO> variables, like C<$^X> and
+C<${^GLOBAL_PHASE}> is now deprecated.
+
+=item *
+
+L<Useless use of attribute "const"|perldiag/Useless use of attribute "const">
+
+(W misc) The C<const> attribute has no effect except
+on anonymous closure prototypes. You applied it to
+a subroutine via L<attributes.pm|attributes>. This is only useful
+inside an attribute handler for an anonymous subroutine.
+
+=item *
+
+L<Useless use of E<sol>d modifier in transliteration operator|perldiag/"Useless use of /d modifier in transliteration operator">
+
+This is not a new diagnostic, but in earlier releases was accidentally
+not displayed if the transliteration contained wide characters. This is
+now fixed, so that you may see this diagnostic in places where you
+previously didn't (but should have).
+
+=item *
+
+L<E<quot>use re 'strict'E<quot> is experimental|perldiag/"use re 'strict'" is experimental>
+
+(S experimental::re_strict) The things that are different when a regular
+expression pattern is compiled under C<'strict'> are subject to change
+in future Perl releases in incompatible ways; there are also proposals
+to change how to enable strict checking instead of using this subpragma.
+This means that a pattern that compiles today may not in a future Perl
+release. This warning is to alert you to that risk.
+
+=item *
+
+L<Warning: unable to close filehandle properly: %s|perldiag/"Warning: unable to close filehandle properly: %s">
+
+L<Warning: unable to close filehandle %s properly: %s|perldiag/"Warning: unable to close filehandle %s properly: %s">
+
+(S io) Previously, perl silently ignored any errors when doing an implicit
+close of a filehandle, I<i.e.> where the reference count of the filehandle
+reached zero and the user's code hadn't already called C<close()>; I<e.g.>
+
+ {
+ open my $fh, '>', $file or die "open: '$file': $!\n";
+ print $fh, $data or die;
+ } # implicit close here
+
+In a situation such as disk full, due to buffering, the error may only be
+detected during the final close, so not checking the result of the close is
+dangerous.
+
+So perl now warns in such situations.
+
+=item *
+
+L<Wide character (U+%X) in %s|perldiag/"Wide character (U+%X) in %s">
+
+(W locale) While in a single-byte locale (I<i.e.>, a non-UTF-8
+one), a multi-byte character was encountered. Perl considers this
+character to be the specified Unicode code point. Combining non-UTF-8
+locales and Unicode is dangerous. Almost certainly some characters
+will have two different representations. For example, in the ISO 8859-7
+(Greek) locale, the code point 0xC3 represents a Capital Gamma. But so
+also does 0x393. This will make string comparisons unreliable.
+
+You likely need to figure out how this multi-byte character got mixed up
+with your single-byte locale (or perhaps you thought you had a UTF-8
+locale, but Perl disagrees).
+
+The warnings category C<locale> is new.
+
+=back
+
+=head2 Changes to Existing Diagnostics
+
+=over 4
+
+=item *
+
+<> should be quotes
+
+This warning has been changed to
+L<< <> at require-statement should be quotes|perldiag/"<> at require-statement should be quotes" >>
+to make the issue more identifiable.
+
+=item *
+
+L<Argument "%s" isn't numeric%s|perldiag/"Argument "%s" isn't numeric%s">
+
+The L<perldiag> entry for this warning has added this clarifying note:
+
+ Note that for the Inf and NaN (infinity and not-a-number) the
+ definition of "numeric" is somewhat unusual: the strings themselves
+ (like "Inf") are considered numeric, and anything following them is
+ considered non-numeric.
+
+=item *
+
+L<Global symbol "%s" requires explicit package name|perldiag/"Global symbol "%s" requires explicit package name (did you forget to declare "my %s"?)">
+
+This message has had '(did you forget to declare "my %s"?)' appended to it, to
+make it more helpful to new Perl programmers.
+L<[perl #121638]|https://rt.perl.org/Ticket/Display.html?id=121638>
+
+=item *
+
+'"my" variable &foo::bar can't be in a package' has been reworded to say
+'subroutine' instead of 'variable'.
+
+=item *
+
+L<<< \N{} in character class restricted to one character in regex; marked by
+S<< <-- HERE >> in mE<sol>%sE<sol>|perldiag/"\N{} in inverted character
+class or as a range end-point is restricted to one character in regex;
+marked by <-- HERE in m/%s/" >>>
+
+This message has had I<character class> changed to I<inverted character
+class or as a range end-point is> to reflect improvements in
+C<qr/[\N{named sequence}]/> (see under L</Selected Bug Fixes>).
+
+=item *
+
+L<panic: frexp|perldiag/"panic: frexp: %f">
+
+This message has had ': C<%f>' appended to it, to show what the offending
+floating point number is.
+
+=item *
+
+I<Possible precedence problem on bitwise %c operator> reworded as
+L<Possible precedence problem on bitwise %s operator|perldiag/"Possible precedence problem on bitwise %s operator">.
+
+=item *
+
+L<Unsuccessful %s on filename containing newline|perldiag/"Unsuccessful %s on filename containing newline">
+
+This warning is now only produced when the newline is at the end of
+the filename.
+
+=item *
+
+"Variable C<%s> will not stay shared" has been changed to say "Subroutine"
+when it is actually a lexical sub that will not stay shared.
+
+=item *
+
+L<Variable length lookbehind not implemented in regex mE<sol>%sE<sol>|perldiag/"Variable length lookbehind not implemented in regex m/%s/">
+
+The L<perldiag> entry for this warning has had information about Unicode
+behavior added.
+
+=back
+
+=head2 Diagnostic Removals
+
+=over
+
+=item *
+
+"Ambiguous use of -foo resolved as -&foo()"
+
+There is actually no ambiguity here, and this impedes the use of negated
+constants; I<e.g.>, C<-Inf>.
+
+=item *
+
+"Constant is not a FOO reference"
+
+Compile-time checking of constant dereferencing (I<e.g.>, C<< my_constant->() >>)
+has been removed, since it was not taking overloading into account.
+L<[perl #69456]|https://rt.perl.org/Ticket/Display.html?id=69456>
+L<[perl #122607]|https://rt.perl.org/Ticket/Display.html?id=122607>
+
+=back
+
+=head1 Utility Changes
+
+=head2 F<find2perl>, F<s2p> and F<a2p> removal
+
+=over 4
+
+=item *
+
+The F<x2p/> directory has been removed from the Perl core.
+
+This removes find2perl, s2p and a2p. They have all been released to CPAN as
+separate distributions (C<App::find2perl>, C<App::s2p>, C<App::a2p>).
+
+=back
+
+=head2 L<h2ph>
+
+=over 4
+
+=item *
+
+F<h2ph> now handles hexadecimal constants in the compiler's predefined
+macro definitions, as visible in C<$Config{cppsymbols}>.
+L<[perl #123784]|https://rt.perl.org/Ticket/Display.html?id=123784>.
+
+=back
+
+=head2 L<encguess>
+
+=over 4
+
+=item *
+
+No longer depends on non-core modules.
+
+=back
+
+=head1 Configuration and Compilation
+
+=over 4
+
+=item *
+
+F<Configure> now checks for C<lrintl()>, C<lroundl()>, C<llrintl()>, and
+C<llroundl()>.
+
+=item *
+
+F<Configure> with C<-Dmksymlinks> should now be faster.
+L<[perl #122002]|https://rt.perl.org/Ticket/Display.html?id=122002>.
+
+=item *
+
+The C<pthreads> and C<cl> libraries will be linked by default if present.
+This allows XS modules that require threading to work on non-threaded
+perls. Note that you must still pass C<-Dusethreads> if you want a
+threaded perl.
+
+=item *
+
+To get more precision and range for floating point numbers one can now
+use the GCC quadmath library which implements the quadruple precision
+floating point numbers on x86 and IA-64 platforms. See F<INSTALL> for
+details.
+
+=item *
+
+MurmurHash64A and MurmurHash64B can now be configured as the internal hash
+function.
+
+=item *
+
+C<make test.valgrind> now supports parallel testing.
+
+For example:
+
+ TEST_JOBS=9 make test.valgrind
+
+See L<perlhacktips/valgrind> for more information.
+
+L<[perl #121431]|https://rt.perl.org/Ticket/Display.html?id=121431>
+
+=item *
+
+The MAD (Misc Attribute Decoration) build option has been removed
+
+This was an unmaintained attempt at preserving
+the Perl parse tree more faithfully so that automatic conversion of
+Perl 5 to Perl 6 would have been easier.
+
+This build-time configuration option had been unmaintained for years,
+and had probably seriously diverged on both Perl 5 and Perl 6 sides.
+
+=item *
+
+A new compilation flag, C<< -DPERL_OP_PARENT >> is available. For details,
+see the discussion below at L<< /Internal Changes >>.
+
+=item *
+
+Pathtools no longer tries to load XS on miniperl. This speeds up building perl
+slightly.
+
+=back
+
+=head1 Testing
+
+=over 4
+
+=item *
+
+F<t/porting/re_context.t> has been added to test that L<utf8> and its
+dependencies only use the subset of the C<$1..$n> capture vars that
+C<Perl_save_re_context()> is hard-coded to localize, because that function
+has no efficient way of determining at runtime what vars to localize.
+
+=item *
+
+Tests for performance issues have been added in the file F<t/perf/taint.t>.
+
+=item *
+
+Some regular expression tests are written in such a way that they will
+run very slowly if certain optimizations break. These tests have been
+moved into new files, F<< t/re/speed.t >> and F<< t/re/speed_thr.t >>,
+and are run with a C<< watchdog() >>.
+
+=item *
+
+C<< test.pl >> now allows C<< plan skip_all => $reason >>, to make it
+more compatible with C<< Test::More >>.
+
+=item *
+
+A new test script, F<op/infnan.t>, has been added to test if infinity and NaN are
+working correctly. See L</Infinity and NaN (not-a-number) handling improved>.
+
+=back
+
+=head1 Platform Support
+
+=head2 Regained Platforms
+
+=over 4
+
+=item IRIX and Tru64 platforms are working again.
+
+Some C<make test> failures remain:
+L<[perl #123977]|https://rt.perl.org/Ticket/Display.html?id=123977>
+and L<[perl #125298]|https://rt.perl.org/Ticket/Display.html?id=125298>
+for IRIX; L<[perl #124212]|https://rt.perl.org/Ticket/Display.html?id=124212>,
+L<[cpan #99605]|https://rt.cpan.org/Public/Bug/Display.html?id=99605>, and
+L<[cpan #104836]|https://rt.cpan.org/Ticket/Display.html?id=104836> for Tru64.
+
+=item z/OS running EBCDIC Code Page 1047
+
+Core perl now works on this EBCDIC platform. Earlier perls also worked, but,
+even though support wasn't officially withdrawn, recent perls would not compile
+and run well. Perl 5.20 would work, but had many bugs which have now been
+fixed. Many CPAN modules that ship with Perl still fail tests, including
+C<Pod::Simple>. However the version of C<Pod::Simple> currently on CPAN should work;
+it was fixed too late to include in Perl 5.22. Work is under way to fix many
+of the still-broken CPAN modules, which likely will be installed on CPAN when
+completed, so that you may not have to wait until Perl 5.24 to get a working
+version.
+
+=back
+
+=head2 Discontinued Platforms
+
+=over 4
+
+=item NeXTSTEP/OPENSTEP
+
+NeXTSTEP was a proprietary operating system bundled with NeXT's
+workstations in the early to mid 90s; OPENSTEP was an API specification
+that provided a NeXTSTEP-like environment on a non-NeXTSTEP system. Both
+are now long dead, so support for building Perl on them has been removed.
+
+=back
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item EBCDIC
+
+Special handling is required of the perl interpreter on EBCDIC platforms
+to get C<qr/[i-j]/> to match only C<"i"> and C<"j">, since there are 7
+characters between the
+code points for C<"i"> and C<"j">. This special handling had only been
+invoked when both ends of the range are literals. Now it is also
+invoked if any of the C<\N{...}> forms for specifying a character by
+name or Unicode code point is used instead of a literal. See
+L<perlrecharclass/Character Ranges>.
+
+=item HP-UX
+
+The archname now distinguishes use64bitint from use64bitall.
+
+=item Android
+
+Build support has been improved for cross-compiling in general and for
+Android in particular.
+
+=item VMS
+
+=over 4
+
+=item *
+
+When spawning a subprocess without waiting, the return value is now
+the correct PID.
+
+=item *
+
+Fix a prototype so linking doesn't fail under the VMS C++ compiler.
+
+=item *
+
+C<finite>, C<finitel>, and C<isfinite> detection has been added to
+C<configure.com>, environment handling has had some minor changes, and
+a fix for legacy feature checking status.
+
+=back
+
+=item Win32
+
+=over 4
+
+=item *
+
+F<miniperl.exe> is now built with C<-fno-strict-aliasing>, allowing 64-bit
+builds to complete on GCC 4.8.
+L<[perl #123976]|https://rt.perl.org/Ticket/Display.html?id=123976>
+
+=item *
+
+C<nmake minitest> now works on Win32. Due to dependency issues you
+need to build C<nmake test-prep> first, and a small number of the
+tests fail.
+L<[perl #123394]|https://rt.perl.org/Ticket/Display.html?id=123394>
+
+=item *
+
+Perl can now be built in C++ mode on Windows by setting the makefile macro
+C<USE_CPLUSPLUS> to the value "define".
+
+=item *
+
+The list form of piped open has been implemented for Win32. Note: unlike
+C<system LIST> this does not fall back to the shell.
+L<[perl #121159]|https://rt.perl.org/Ticket/Display.html?id=121159>
+
+=item *
+
+New C<DebugSymbols> and C<DebugFull> configuration options added to
+Windows makefiles.
+
+=item *
+
+Previously, compiling XS modules (including CPAN ones) using Visual C++ for
+Win64 resulted in around a dozen warnings per file from F<hv_func.h>. These
+warnings have been silenced.
+
+=item *
+
+Support for building without PerlIO has been removed from the Windows
+makefiles. Non-PerlIO builds were all but deprecated in Perl 5.18.0 and are
+already not supported by F<Configure> on POSIX systems.
+
+=item *
+
+Between 2 and 6 milliseconds and seven I/O calls have been saved per attempt
+to open a perl module for each path in C<@INC>.
+
+=item *
+
+Intel C builds are now always built with C99 mode on.
+
+=item *
+
+C<%I64d> is now being used instead of C<%lld> for MinGW.
+
+=item *
+
+In the experimental C<:win32> layer, a crash in C<open> was fixed. Also
+opening F</dev/null> (which works under Win32 Perl's default C<:unix>
+layer) was implemented for C<:win32>.
+L<[perl #122224]|https://rt.perl.org/Ticket/Display.html?id=122224>
+
+=item *
+
+A new makefile option, C<USE_LONG_DOUBLE>, has been added to the Windows
+dmake makefile for gcc builds only. Set this to "define" if you want perl to
+use long doubles to give more accuracy and range for floating point numbers.
+
+=back
+
+=item OpenBSD
+
+On OpenBSD, Perl will now default to using the system C<malloc> due to the
+security features it provides. Perl's own malloc wrapper has been in use
+since v5.14 due to performance reasons, but the OpenBSD project believes
+the tradeoff is worth it and would prefer that users who need the speed
+specifically ask for it.
+
+L<[perl #122000]|https://rt.perl.org/Ticket/Display.html?id=122000>.
+
+=item Solaris
+
+=over 4
+
+=item *
+
+We now look for the Sun Studio compiler in both F</opt/solstudio*> and
+F</opt/solarisstudio*>.
+
+=item *
+
+Builds on Solaris 10 with C<-Dusedtrace> would fail early since make
+didn't follow implied dependencies to build C<perldtrace.h>. Added an
+explicit dependency to C<depend>.
+L<[perl #120120]|https://rt.perl.org/Ticket/Display.html?id=120120>
+
+=item *
+
+C99 options have been cleaned up; hints look for C<solstudio>
+as well as C<SUNWspro>; and support for native C<setenv> has been added.
+
+=back
+
+=back
+
+=head1 Internal Changes
+
+=over 4
+
+=item *
+
+Experimental support has been added to allow ops in the optree to locate
+their parent, if any. This is enabled by the non-default build option
+C<-DPERL_OP_PARENT>. It is envisaged that this will eventually become
+enabled by default, so XS code which directly accesses the C<op_sibling>
+field of ops should be updated to be future-proofed.
+
+On C<PERL_OP_PARENT> builds, the C<op_sibling> field has been renamed
+C<op_sibparent> and a new flag, C<op_moresib>, added. On the last op in a
+sibling chain, C<op_moresib> is false and C<op_sibparent> points to the
+parent (if any) rather than being C<NULL>.
+
+To make existing code work transparently whether using C<PERL_OP_PARENT>
+or not, a number of new macros and functions have been added that should
+be used, rather than directly manipulating C<op_sibling>.
+
+For the case of just reading C<op_sibling> to determine the next sibling,
+two new macros have been added. A simple scan through a sibling chain
+like this:
+
+ for (; kid->op_sibling; kid = kid->op_sibling) { ... }
+
+should now be written as:
+
+ for (; OpHAS_SIBLING(kid); kid = OpSIBLING(kid)) { ... }
+
+For altering optrees, a general-purpose function C<op_sibling_splice()>
+has been added, which allows for manipulation of a chain of sibling ops.
+By analogy with the Perl function C<splice()>, it allows you to cut out
+zero or more ops from a sibling chain and replace them with zero or more
+new ops. It transparently handles all the updating of sibling, parent,
+op_last pointers etc.
+
+If you need to manipulate ops at a lower level, then three new macros,
+C<OpMORESIB_set>, C<OpLASTSIB_set> and C<OpMAYBESIB_set> are intended to
+be a low-level portable way to set C<op_sibling> / C<op_sibparent> while
+also updating C<op_moresib>. The first sets the sibling pointer to a new
+sibling, the second makes the op the last sibling, and the third
+conditionally does the first or second action. Note that unlike
+C<op_sibling_splice()> these macros won't maintain consistency in the
+parent at the same time (I<e.g.> by updating C<op_first> and C<op_last> where
+appropriate).
+
+A C-level C<Perl_op_parent()> function and a Perl-level C<B::OP::parent()>
+method have been added. The C function only exists under
+C<PERL_OP_PARENT> builds (using it is build-time error on vanilla
+perls). C<B::OP::parent()> exists always, but on a vanilla build it
+always returns C<NULL>. Under C<PERL_OP_PARENT>, they return the parent
+of the current op, if any. The variable C<$B::OP::does_parent> allows you
+to determine whether C<B> supports retrieving an op's parent.
+
+C<PERL_OP_PARENT> was introduced in 5.21.2, but the interface was
+changed considerably in 5.21.11. If you updated your code before the
+5.21.11 changes, it may require further revision. The main changes after
+5.21.2 were:
+
+=over 4
+
+=item *
+
+The C<OP_SIBLING> and C<OP_HAS_SIBLING> macros have been renamed
+C<OpSIBLING> and C<OpHAS_SIBLING> for consistency with other
+op-manipulating macros.
+
+=item *
+
+The C<op_lastsib> field has been renamed C<op_moresib>, and its meaning
+inverted.
+
+=item *
+
+The macro C<OpSIBLING_set> has been removed, and has been superseded by
+C<OpMORESIB_set> I<et al>.
+
+=item *
+
+The C<op_sibling_splice()> function now accepts a null C<parent> argument
+where the splicing doesn't affect the first or last ops in the sibling
+chain
+
+=back
+
+=item *
+
+Macros have been created to allow XS code to better manipulate the POSIX locale
+category C<LC_NUMERIC>. See L<perlapi/Locale-related functions and macros>.
+
+=item *
+
+The previous C<atoi> I<et al> replacement function, C<grok_atou>, has now been
+superseded by C<grok_atoUV>. See L<perlclib> for details.
+
+=item *
+
+A new function, C<Perl_sv_get_backrefs()>, has been added which allows you
+retrieve the weak references, if any, which point at an SV.
+
+=item *
+
+The C<screaminstr()> function has been removed. Although marked as
+public API, it was undocumented and had no usage in CPAN modules. Calling
+it has been fatal since 5.17.0.
+
+=item *
+
+The C<newDEFSVOP()>, C<block_start()>, C<block_end()> and C<intro_my()>
+functions have been added to the API.
+
+=item *
+
+The internal C<convert> function in F<op.c> has been renamed
+C<op_convert_list> and added to the API.
+
+=item *
+
+The C<sv_magic()> function no longer forbids "ext" magic on read-only
+values. After all, perl can't know whether the custom magic will modify
+the SV or not.
+L<[perl #123103]|https://rt.perl.org/Ticket/Display.html?id=123103>.
+
+=item *
+
+Accessing L<perlapi/CvPADLIST> on an XSUB is now forbidden.
+
+The C<CvPADLIST> field has been reused for a different internal purpose
+for XSUBs. So in particular, you can no longer rely on it being NULL as a
+test of whether a CV is an XSUB. Use C<CvISXSUB()> instead.
+
+=item *
+
+SVs of type C<SVt_NV> are now sometimes bodiless when the build
+configuration and platform allow it: specifically, when C<< sizeof(NV) <=
+sizeof(IV) >>. "Bodiless" means that the NV value is stored directly in
+the head of an SV, without requiring a separate body to be allocated. This
+trick has already been used for IVs since 5.9.2 (though in the case of
+IVs, it is always used, regardless of platform and build configuration).
+
+=item *
+
+The C<$DB::single>, C<$DB::signal> and C<$DB::trace> variables now have set- and
+get-magic that stores their values as IVs, and those IVs are used when
+testing their values in C<pp_dbstate()>. This prevents perl from
+recursing infinitely if an overloaded object is assigned to any of those
+variables.
+L<[perl #122445]|https://rt.perl.org/Ticket/Display.html?id=122445>.
+
+=item *
+
+C<Perl_tmps_grow()>, which is marked as public API but is undocumented, has
+been removed from the public API. This change does not affect XS code that
+uses the C<EXTEND_MORTAL> macro to pre-extend the mortal stack.
+
+=item *
+
+Perl's internals no longer sets or uses the C<SVs_PADMY> flag.
+C<SvPADMY()> now returns a true value for anything not marked C<PADTMP>
+and C<SVs_PADMY> is now defined as 0.
+
+=item *
+
+The macros C<SETsv> and C<SETsvUN> have been removed. They were no longer used
+in the core since commit 6f1401dc2a five years ago, and have not been
+found present on CPAN.
+
+=item *
+
+The C<< SvFAKE >> bit (unused on HVs) got informally reserved by
+David Mitchell for future work on vtables.
+
+=item *
+
+The C<sv_catpvn_flags()> function accepts C<SV_CATBYTES> and C<SV_CATUTF8>
+flags, which specify whether the appended string is bytes or UTF-8,
+respectively. (These flags have in fact been present since 5.16.0, but
+were formerly not regarded as part of the API.)
+
+=item *
+
+A new opcode class, C<< METHOP >>, has been introduced. It holds
+information used at runtime to improve the performance
+of class/object method calls.
+
+C<< OP_METHOD >> and C<< OP_METHOD_NAMED >> have changed from being
+C<< UNOP/SVOP >> to being C<< METHOP >>.
+
+=item *
+
+C<cv_name()> is a new API function that can be passed a CV or GV. It
+returns an SV containing the name of the subroutine, for use in
+diagnostics.
+
+L<[perl #116735]|https://rt.perl.org/Ticket/Display.html?id=116735>
+L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
+
+=item *
+
+C<cv_set_call_checker_flags()> is a new API function that works like
+C<cv_set_call_checker()>, except that it allows the caller to specify
+whether the call checker requires a full GV for reporting the subroutine's
+name, or whether it could be passed a CV instead. Whatever value is
+passed will be acceptable to C<cv_name()>. C<cv_set_call_checker()>
+guarantees there will be a GV, but it may have to create one on the fly,
+which is inefficient.
+L<[perl #116735]|https://rt.perl.org/Ticket/Display.html?id=116735>
+
+=item *
+
+C<CvGV> (which is not part of the API) is now a more complex macro, which may
+call a function and reify a GV. For those cases where it has been used as a
+boolean, C<CvHASGV> has been added, which will return true for CVs that
+notionally have GVs, but without reifying the GV. C<CvGV> also returns a GV
+now for lexical subs.
+L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
+
+=item *
+
+The L<perlapi/sync_locale> function has been added to the public API.
+Changing the program's locale should be avoided by XS code. Nevertheless,
+certain non-Perl libraries called from XS need to do so, such as C<Gtk>.
+When this happens, Perl needs to be told that the locale has
+changed. Use this function to do so, before returning to Perl.
+
+=item *
+
+The defines and labels for the flags in the C<op_private> field of OPs are now
+auto-generated from data in F<regen/op_private>. The noticeable effect of this
+is that some of the flag output of C<Concise> might differ slightly, and the
+flag output of S<C<perl -Dx>> may differ considerably (they both use the same set
+of labels now). Also, debugging builds now have a new assertion in
+C<op_free()> to ensure that the op doesn't have any unrecognized flags set in
+C<op_private>.
+
+=item *
+
+The deprecated variable C<PL_sv_objcount> has been removed.
+
+=item *
+
+Perl now tries to keep the locale category C<LC_NUMERIC> set to "C"
+except around operations that need it to be set to the program's
+underlying locale. This protects the many XS modules that cannot cope
+with the decimal radix character not being a dot. Prior to this
+release, Perl initialized this category to "C", but a call to
+C<POSIX::setlocale()> would change it. Now such a call will change the
+underlying locale of the C<LC_NUMERIC> category for the program, but the
+locale exposed to XS code will remain "C". There are new macros
+to manipulate the LC_NUMERIC locale, including
+C<STORE_LC_NUMERIC_SET_TO_NEEDED> and
+C<STORE_LC_NUMERIC_FORCE_TO_UNDERLYING>.
+See L<perlapi/Locale-related functions and macros>.
+
+=item *
+
+A new macro L<C<isUTF8_CHAR>|perlapi/isUTF8_CHAR> has been written which
+efficiently determines if the string given by its parameters begins
+with a well-formed UTF-8 encoded character.
+
+=item *
+
+The following private API functions had their context parameter removed:
+C<Perl_cast_ulong>, C<Perl_cast_i32>, C<Perl_cast_iv>, C<Perl_cast_uv>,
+C<Perl_cv_const_sv>, C<Perl_mg_find>, C<Perl_mg_findext>, C<Perl_mg_magical>,
+C<Perl_mini_mktime>, C<Perl_my_dirfd>, C<Perl_sv_backoff>, C<Perl_utf8_hop>.
+
+Note that the prefix-less versions of those functions that are part of the
+public API, such as C<cast_i32()>, remain unaffected.
+
+=item *
+
+The C<PADNAME> and C<PADNAMELIST> types are now separate types, and no
+longer simply aliases for SV and AV.
+L<[perl #123223]|https://rt.perl.org/Ticket/Display.html?id=123223>.
+
+=item *
+
+Pad names are now always UTF-8. The C<PadnameUTF8> macro always returns
+true. Previously, this was effectively the case already, but any support
+for two different internal representations of pad names has now been
+removed.
+
+=item *
+
+A new op class, C<UNOP_AUX>, has been added. This is a subclass of
+C<UNOP> with an C<op_aux> field added, which points to an array of unions
+of UV, SV* etc. It is intended for where an op needs to store more data
+than a simple C<op_sv> or whatever. Currently the only op of this type is
+C<OP_MULTIDEREF> (see next item).
+
+=item *
+
+A new op has been added, C<OP_MULTIDEREF>, which performs one or more
+nested array and hash lookups where the key is a constant or simple
+variable. For example the expression C<$a[0]{$k}[$i]>, which previously
+involved ten C<rv2Xv>, C<Xelem>, C<gvsv> and C<const> ops is now performed
+by a single C<multideref> op. It can also handle C<local>, C<exists> and
+C<delete>. A non-simple index expression, such as C<[$i+1]> is still done
+using C<aelem>/C<helem>, and single-level array lookup with a small constant
+index is still done using C<aelemfast>.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+C<close> now sets C<$!>
+
+When an I/O error occurs, the fact that there has been an error is recorded
+in the handle. C<close> returns false for such a handle. Previously, the
+value of C<$!> would be untouched by C<close>, so the common convention of
+writing S<C<close $fh or die $!>> did not work reliably. Now the handle
+records the value of C<$!>, too, and C<close> restores it.
+
+=item *
+
+C<no re> now can turn off everything that C<use re> enables
+
+Previously, running C<no re> would turn off only a few things. Now it
+can turn off all the enabled things. For example, the only way to
+stop debugging, once enabled, was to exit the enclosing block; that is
+now fixed.
+
+=item *
+
+C<pack("D", $x)> and C<pack("F", $x)> now zero the padding on x86 long
+double builds. Under some build options on GCC 4.8 and later, they used
+to either overwrite the zero-initialized padding, or bypass the
+initialized buffer entirely. This caused F<op/pack.t> to fail.
+L<[perl #123971]|https://rt.perl.org/Ticket/Display.html?id=123971>
+
+=item *
+
+Extending an array cloned from a parent thread could result in "Modification of
+a read-only value attempted" errors when attempting to modify the new elements.
+L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
+
+=item *
+
+An assertion failure and subsequent crash with C<< *x=<y> >> has been fixed.
+L<[perl #123790]|https://rt.perl.org/Ticket/Display.html?id=123790>
+
+=item *
+
+A possible crashing/looping bug related to compiling lexical subs has been
+fixed.
+L<[perl #124099]|https://rt.perl.org/Ticket/Display.html?id=124099>
+
+=item *
+
+UTF-8 now works correctly in function names, in unquoted HERE-document
+terminators, and in variable names used as array indexes.
+L<[perl #124113]|https://rt.perl.org/Ticket/Display.html?id=124113>
+
+=item *
+
+Repeated global pattern matches in scalar context on large tainted strings were
+exponentially slow depending on the current match position in the string.
+L<[perl #123202]|https://rt.perl.org/Ticket/Display.html?id=123202>
+
+=item *
+
+Various crashes due to the parser getting confused by syntax errors have been
+fixed.
+L<[perl #123801]|https://rt.perl.org/Ticket/Display.html?id=123801>
+L<[perl #123802]|https://rt.perl.org/Ticket/Display.html?id=123802>
+L<[perl #123955]|https://rt.perl.org/Ticket/Display.html?id=123955>
+L<[perl #123995]|https://rt.perl.org/Ticket/Display.html?id=123995>
+
+=item *
+
+C<split> in the scope of lexical C<$_> has been fixed not to fail assertions.
+L<[perl #123763]|https://rt.perl.org/Ticket/Display.html?id=123763>
+
+=item *
+
+C<my $x : attr> syntax inside various list operators no longer fails
+assertions.
+L<[perl #123817]|https://rt.perl.org/Ticket/Display.html?id=123817>
+
+=item *
+
+An C<@> sign in quotes followed by a non-ASCII digit (which is not a valid
+identifier) would cause the parser to crash, instead of simply trying the
+C<@> as literal. This has been fixed.
+L<[perl #123963]|https://rt.perl.org/Ticket/Display.html?id=123963>
+
+=item *
+
+C<*bar::=*foo::=*glob_with_hash> has been crashing since Perl 5.14, but no
+longer does.
+L<[perl #123847]|https://rt.perl.org/Ticket/Display.html?id=123847>
+
+=item *
+
+C<foreach> in scalar context was not pushing an item on to the stack, resulting
+in bugs. (S<C<print 4, scalar do { foreach(@x){} } + 1>> would print 5.)
+It has been fixed to return C<undef>.
+L<[perl #124004]|https://rt.perl.org/Ticket/Display.html?id=124004>
+
+=item *
+
+Several cases of data used to store environment variable contents in core C
+code being potentially overwritten before being used have been fixed.
+L<[perl #123748]|https://rt.perl.org/Ticket/Display.html?id=123748>
+
+=item *
+
+Some patterns starting with C</.*..../> matched against long strings have
+been slow since v5.8, and some of the form C</.*..../i> have been slow
+since v5.18. They are now all fast again.
+L<[perl #123743]|https://rt.perl.org/Ticket/Display.html?id=123743>.
+
+=item *
+
+The original visible value of C<$/> is now preserved when it is set to
+an invalid value. Previously if you set C<$/> to a reference to an
+array, for example, perl would produce a runtime error and not set
+C<PL_rs>, but Perl code that checked C<$/> would see the array
+reference.
+L<[perl #123218]|https://rt.perl.org/Ticket/Display.html?id=123218>.
+
+=item *
+
+In a regular expression pattern, a POSIX class, like C<[:ascii:]>, must
+be inside a bracketed character class, like C<qr/[[:ascii:]]/>. A
+warning is issued when something looking like a POSIX class is not
+inside a bracketed class. That warning wasn't getting generated when
+the POSIX class was negated: C<[:^ascii:]>. This is now fixed.
+
+=item *
+
+Perl 5.14.0 introduced a bug whereby S<C<eval { LABEL: }>> would crash. This
+has been fixed.
+L<[perl #123652]|https://rt.perl.org/Ticket/Display.html?id=123652>.
+
+=item *
+
+Various crashes due to the parser getting confused by syntax errors have
+been fixed.
+L<[perl #123617]|https://rt.perl.org/Ticket/Display.html?id=123617>.
+L<[perl #123737]|https://rt.perl.org/Ticket/Display.html?id=123737>.
+L<[perl #123753]|https://rt.perl.org/Ticket/Display.html?id=123753>.
+L<[perl #123677]|https://rt.perl.org/Ticket/Display.html?id=123677>.
+
+=item *
+
+Code like C</$a[/> used to read the next line of input and treat it as
+though it came immediately after the opening bracket. Some invalid code
+consequently would parse and run, but some code caused crashes, so this is
+now disallowed.
+L<[perl #123712]|https://rt.perl.org/Ticket/Display.html?id=123712>.
+
+=item *
+
+Fix argument underflow for C<pack>.
+L<[perl #123874]|https://rt.perl.org/Ticket/Display.html?id=123874>.
+
+=item *
+
+Fix handling of non-strict C<\x{}>. Now C<\x{}> is equivalent to C<\x{0}>
+instead of faulting.
+
+=item *
+
+C<stat -t> is now no longer treated as stackable, just like C<-t stat>.
+L<[perl #123816]|https://rt.perl.org/Ticket/Display.html?id=123816>.
+
+=item *
+
+The following no longer causes a SEGV: C<qr{x+(y(?0))*}>.
+
+=item *
+
+Fixed infinite loop in parsing backrefs in regexp patterns.
+
+=item *
+
+Several minor bug fixes in behavior of Infinity and NaN, including
+warnings when stringifying Infinity-like or NaN-like strings. For example,
+"NaNcy" doesn't numify to NaN anymore.
+
+=item *
+
+A bug in regular expression patterns that could lead to segfaults and
+other crashes has been fixed. This occurred only in patterns compiled
+with C</i> while taking into account the current POSIX locale (which usually
+means they have to be compiled within the scope of C<S<use locale>>),
+and there must be a string of at least 128 consecutive bytes to match.
+L<[perl #123539]|https://rt.perl.org/Ticket/Display.html?id=123539>.
+
+=item *
+
+C<s///g> now works on very long strings (where there are more than 2
+billion iterations) instead of dying with 'Substitution loop'.
+L<[perl #103260]|https://rt.perl.org/Ticket/Display.html?id=103260>.
+L<[perl #123071]|https://rt.perl.org/Ticket/Display.html?id=123071>.
+
+=item *
+
+C<gmtime> no longer crashes with not-a-number values.
+L<[perl #123495]|https://rt.perl.org/Ticket/Display.html?id=123495>.
+
+=item *
+
+C<\()> (a reference to an empty list), and C<y///> with lexical C<$_> in
+scope, could both do a bad write past the end of the stack. They have
+both been fixed to extend the stack first.
+
+=item *
+
+C<prototype()> with no arguments used to read the previous item on the
+stack, so S<C<print "foo", prototype()>> would print foo's prototype.
+It has been fixed to infer C<$_> instead.
+L<[perl #123514]|https://rt.perl.org/Ticket/Display.html?id=123514>.
+
+=item *
+
+Some cases of lexical state subs declared inside predeclared subs could
+crash, for example when evalling a string including the name of an outer
+variable, but no longer do.
+
+=item *
+
+Some cases of nested lexical state subs inside anonymous subs could cause
+'Bizarre copy' errors or possibly even crashes.
+
+=item *
+
+When trying to emit warnings, perl's default debugger (F<perl5db.pl>) was
+sometimes giving 'Undefined subroutine &DB::db_warn called' instead. This
+bug, which started to occur in Perl 5.18, has been fixed.
+L<[perl #123553]|https://rt.perl.org/Ticket/Display.html?id=123553>.
+
+=item *
+
+Certain syntax errors in substitutions, such as C<< s/${<>{})// >>, would
+crash, and had done so since Perl 5.10. (In some cases the crash did not
+start happening till 5.16.) The crash has, of course, been fixed.
+L<[perl #123542]|https://rt.perl.org/Ticket/Display.html?id=123542>.
+
+=item *
+
+Fix a couple of string grow size calculation overflows; in particular,
+a repeat expression like S<C<33 x ~3>> could cause a large buffer
+overflow since the new output buffer size was not correctly handled by
+C<SvGROW()>. An expression like this now properly produces a memory wrap
+panic.
+L<[perl #123554]|https://rt.perl.org/Ticket/Display.html?id=123554>.
+
+=item *
+
+C<< formline("@...", "a"); >> would crash. The C<FF_CHECKNL> case in
+C<pp_formline()> didn't set the pointer used to mark the chop position,
+which led to the C<FF_MORE> case crashing with a segmentation fault.
+This has been fixed.
+L<[perl #123538]|https://rt.perl.org/Ticket/Display.html?id=123538>.
+
+=item *
+
+A possible buffer overrun and crash when parsing a literal pattern during
+regular expression compilation has been fixed.
+L<[perl #123604]|https://rt.perl.org/Ticket/Display.html?id=123604>.
+
+=item *
+
+C<fchmod()> and C<futimes()> now set C<$!> when they fail due to being
+passed a closed file handle.
+L<[perl #122703]|https://rt.perl.org/Ticket/Display.html?id=122703>.
+
+=item *
+
+C<op_free()> and C<scalarvoid()> no longer crash due to a stack overflow
+when freeing a deeply recursive op tree.
+L<[perl #108276]|https://rt.perl.org/Ticket/Display.html?id=108276>.
+
+=item *
+
+In Perl 5.20.0, C<$^N> accidentally had the internal UTF-8 flag turned off
+if accessed from a code block within a regular expression, effectively
+UTF-8-encoding the value. This has been fixed.
+L<[perl #123135]|https://rt.perl.org/Ticket/Display.html?id=123135>.
+
+=item *
+
+A failed C<semctl> call no longer overwrites existing items on the stack,
+which means that C<(semctl(-1,0,0,0))[0]> no longer gives an
+"uninitialized" warning.
+
+=item *
+
+C<else{foo()}> with no space before C<foo> is now better at assigning the
+right line number to that statement.
+L<[perl #122695]|https://rt.perl.org/Ticket/Display.html?id=122695>.
+
+=item *
+
+Sometimes the assignment in C<@array = split> gets optimised so that C<split>
+itself writes directly to the array. This caused a bug, preventing this
+assignment from being used in lvalue context. So
+C<(@a=split//,"foo")=bar()> was an error. (This bug probably goes back to
+Perl 3, when the optimisation was added.) It has now been fixed.
+L<[perl #123057]|https://rt.perl.org/Ticket/Display.html?id=123057>.
+
+=item *
+
+When an argument list fails the checks specified by a subroutine
+signature (which is still an experimental feature), the resulting error
+messages now give the file and line number of the caller, not of the
+called subroutine.
+L<[perl #121374]|https://rt.perl.org/Ticket/Display.html?id=121374>.
+
+=item *
+
+The flip-flop operators (C<..> and C<...> in scalar context) used to maintain
+a separate state for each recursion level (the number of times the
+enclosing sub was called recursively), contrary to the documentation. Now
+each closure has one internal state for each flip-flop.
+L<[perl #122829]|https://rt.perl.org/Ticket/Display.html?id=122829>.
+
+=item *
+
+The flip-flop operator (C<..> in scalar context) would return the same
+scalar each time, unless the containing subroutine was called recursively.
+Now it always returns a new scalar.
+L<[perl #122829]|https://rt.perl.org/Ticket/Display.html?id=122829>.
+
+=item *
+
+C<use>, C<no>, statement labels, special blocks (C<BEGIN>) and pod are now
+permitted as the first thing in a C<map> or C<grep> block, the block after
+C<print> or C<say> (or other functions) returning a handle, and within
+C<${...}>, C<@{...}>, etc.
+L<[perl #122782]|https://rt.perl.org/Ticket/Display.html?id=122782>.
+
+=item *
+
+The repetition operator C<x> now propagates lvalue context to its left-hand
+argument when used in contexts like C<foreach>. That allows
+S<C<for(($#that_array)x2) { ... }>> to work as expected if the loop modifies
+C<$_>.
+
+=item *
+
+C<(...) x ...> in scalar context used to corrupt the stack if one operand
+was an object with "x" overloading, causing erratic behavior.
+L<[perl #121827]|https://rt.perl.org/Ticket/Display.html?id=121827>.
+
+=item *
+
+Assignment to a lexical scalar is often optimised away; for example in
+C<my $x; $x = $y + $z>, the assign operator is optimised away and the add
+operator writes its result directly to C<$x>. Various bugs related to
+this optimisation have been fixed. Certain operators on the right-hand
+side would sometimes fail to assign the value at all or assign the wrong
+value, or would call STORE twice or not at all on tied variables. The
+operators affected were C<$foo++>, C<$foo-->, and C<-$foo> under C<use
+integer>, C<chomp>, C<chr> and C<setpgrp>.
+
+=item *
+
+List assignments were sometimes buggy if the same scalar ended up on both
+sides of the assignment due to use of C<tied>, C<values> or C<each>. The
+result would be the wrong value getting assigned.
+
+=item *
+
+C<setpgrp($nonzero)> (with one argument) was accidentally changed in 5.16
+to mean C<setpgrp(0)>. This has been fixed.
+
+=item *
+
+C<__SUB__> could return the wrong value or even corrupt memory under the
+debugger (the C<-d> switch) and in subs containing C<eval $string>.
+
+=item *
+
+When S<C<sub () { $var }>> becomes inlinable, it now returns a different
+scalar each time, just as a non-inlinable sub would, though Perl still
+optimises the copy away in cases where it would make no observable
+difference.
+
+=item *
+
+S<C<my sub f () { $var }>> and S<C<sub () : attr { $var }>> are no longer
+eligible for inlining. The former would crash; the latter would just
+throw the attributes away. An exception is made for the little-known
+C<:method> attribute, which does nothing much.
+
+=item *
+
+Inlining of subs with an empty prototype is now more consistent than
+before. Previously, a sub with multiple statements, of which all but the last
+were optimised away, would be inlinable only if it were an anonymous sub
+containing a string C<eval> or C<state> declaration or closing over an
+outer lexical variable (or any anonymous sub under the debugger). Now any
+sub that gets folded to a single constant after statements have been
+optimised away is eligible for inlining. This applies to things like C<sub
+() { jabber() if DEBUG; 42 }>.
+
+Some subroutines with an explicit C<return> were being made inlinable,
+contrary to the documentation, Now C<return> always prevents inlining.
+
+=item *
+
+On some systems, such as VMS, C<crypt> can return a non-ASCII string. If a
+scalar assigned to had contained a UTF-8 string previously, then C<crypt>
+would not turn off the UTF-8 flag, thus corrupting the return value. This
+would happen with S<C<$lexical = crypt ...>>.
+
+=item *
+
+C<crypt> no longer calls C<FETCH> twice on a tied first argument.
+
+=item *
+
+An unterminated here-doc on the last line of a quote-like operator
+(C<qq[${ <<END }]>, C</(?{ <<END })/>) no longer causes a double free. It
+started doing so in 5.18.
+
+=item *
+
+C<index()> and C<rindex()> no longer crash when used on strings over 2GB in
+size.
+L<[perl #121562]|https://rt.perl.org/Ticket/Display.html?id=121562>.
+
+=item *
+
+A small, previously intentional, memory leak in
+C<PERL_SYS_INIT>/C<PERL_SYS_INIT3> on Win32 builds was fixed. This might
+affect embedders who repeatedly create and destroy perl engines within
+the same process.
+
+=item *
+
+C<POSIX::localeconv()> now returns the data for the program's underlying
+locale even when called from outside the scope of S<C<use locale>>.
+
+=item *
+
+C<POSIX::localeconv()> now works properly on platforms which don't have
+C<LC_NUMERIC> and/or C<LC_MONETARY>, or for which Perl has been compiled
+to disregard either or both of these locale categories. In such
+circumstances, there are now no entries for the corresponding values in
+the hash returned by C<localeconv()>.
+
+=item *
+
+C<POSIX::localeconv()> now marks appropriately the values it returns as
+UTF-8 or not. Previously they were always returned as bytes, even if
+they were supposed to be encoded as UTF-8.
+
+=item *
+
+On Microsoft Windows, within the scope of C<S<use locale>>, the following
+POSIX character classes gave results for many locales that did not
+conform to the POSIX standard:
+C<[[:alnum:]]>,
+C<[[:alpha:]]>,
+C<[[:blank:]]>,
+C<[[:digit:]]>,
+C<[[:graph:]]>,
+C<[[:lower:]]>,
+C<[[:print:]]>,
+C<[[:punct:]]>,
+C<[[:upper:]]>,
+C<[[:word:]]>,
+and
+C<[[:xdigit:]]>.
+This was because the underlying Microsoft implementation does not
+follow the standard. Perl now takes special precautions to correct for
+this.
+
+=item *
+
+Many issues have been detected by L<Coverity|http://www.coverity.com/> and
+fixed.
+
+=item *
+
+C<system()> and friends should now work properly on more Android builds.
+
+Due to an oversight, the value specified through C<-Dtargetsh> to F<Configure>
+would end up being ignored by some of the build process. This caused perls
+cross-compiled for Android to end up with defective versions of C<system()>,
+C<exec()> and backticks: the commands would end up looking for C</bin/sh>
+instead of C</system/bin/sh>, and so would fail for the vast majority
+of devices, leaving C<$!> as C<ENOENT>.
+
+=item *
+
+C<qr(...\(...\)...)>,
+C<qr[...\[...\]...]>,
+and
+C<qr{...\{...\}...}>
+now work. Previously it was impossible to escape these three
+left-characters with a backslash within a regular expression pattern
+where otherwise they would be considered metacharacters, and the pattern
+opening delimiter was the character, and the closing delimiter was its
+mirror character.
+
+=item *
+
+C<< s///e >> on tainted UTF-8 strings corrupted C<< pos() >>. This bug,
+introduced in 5.20, is now fixed.
+L<[perl #122148]|https://rt.perl.org/Ticket/Display.html?id=122148>.
+
+=item *
+
+A non-word boundary in a regular expression (C<< \B >>) did not always
+match the end of the string; in particular C<< q{} =~ /\B/ >> did not
+match. This bug, introduced in perl 5.14, is now fixed.
+L<[perl #122090]|https://rt.perl.org/Ticket/Display.html?id=122090>.
+
+=item *
+
+C<< " P" =~ /(?=.*P)P/ >> should match, but did not. This is now fixed.
+L<[perl #122171]|https://rt.perl.org/Ticket/Display.html?id=122171>.
+
+=item *
+
+Failing to compile C<use Foo> in an C<eval> could leave a spurious
+C<BEGIN> subroutine definition, which would produce a "Subroutine
+BEGIN redefined" warning on the next use of C<use>, or other C<BEGIN>
+block.
+L<[perl #122107]|https://rt.perl.org/Ticket/Display.html?id=122107>.
+
+=item *
+
+C<method { BLOCK } ARGS> syntax now correctly parses the arguments if they
+begin with an opening brace.
+L<[perl #46947]|https://rt.perl.org/Ticket/Display.html?id=46947>.
+
+=item *
+
+External libraries and Perl may have different ideas of what the locale is.
+This is problematic when parsing version strings if the locale's numeric
+separator has been changed. Version parsing has been patched to ensure
+it handles the locales correctly.
+L<[perl #121930]|https://rt.perl.org/Ticket/Display.html?id=121930>.
+
+=item *
+
+A bug has been fixed where zero-length assertions and code blocks inside of a
+regex could cause C<pos> to see an incorrect value.
+L<[perl #122460]|https://rt.perl.org/Ticket/Display.html?id=122460>.
+
+=item *
+
+Dereferencing of constants now works correctly for typeglob constants. Previously
+the glob was stringified and its name looked up. Now the glob itself is used.
+L<[perl #69456]|https://rt.perl.org/Ticket/Display.html?id=69456>
+
+=item *
+
+When parsing a sigil (C<$> C<@> C<%> C<&)> followed by braces,
+the parser no
+longer tries to guess whether it is a block or a hash constructor (causing a
+syntax error when it guesses the latter), since it can only be a block.
+
+=item *
+
+S<C<undef $reference>> now frees the referent immediately, instead of hanging on
+to it until the next statement.
+L<[perl #122556]|https://rt.perl.org/Ticket/Display.html?id=122556>
+
+=item *
+
+Various cases where the name of a sub is used (autoload, overloading, error
+messages) used to crash for lexical subs, but have been fixed.
+
+=item *
+
+Bareword lookup now tries to avoid vivifying packages if it turns out the
+bareword is not going to be a subroutine name.
+
+=item *
+
+Compilation of anonymous constants (I<e.g.>, C<sub () { 3 }>) no longer deletes
+any subroutine named C<__ANON__> in the current package. Not only was
+C<*__ANON__{CODE}> cleared, but there was a memory leak, too. This bug goes
+back to Perl 5.8.0.
+
+=item *
+
+Stub declarations like C<sub f;> and C<sub f ();> no longer wipe out constants
+of the same name declared by C<use constant>. This bug was introduced in Perl
+5.10.0.
+
+=item *
+
+C<qr/[\N{named sequence}]/> now works properly in many instances.
+
+Some names
+known to C<\N{...}> refer to a sequence of multiple characters, instead of the
+usual single character. Bracketed character classes generally only match
+single characters, but now special handling has been added so that they can
+match named sequences, but not if the class is inverted or the sequence is
+specified as the beginning or end of a range. In these cases, the only
+behavior change from before is a slight rewording of the fatal error message
+given when this class is part of a C<?[...])> construct. When the C<[...]>
+stands alone, the same non-fatal warning as before is raised, and only the
+first character in the sequence is used, again just as before.
+
+=item *
+
+Tainted constants evaluated at compile time no longer cause unrelated
+statements to become tainted.
+L<[perl #122669]|https://rt.perl.org/Ticket/Display.html?id=122669>
+
+=item *
+
+S<C<open $$fh, ...>>, which vivifies a handle with a name like
+C<"main::_GEN_0">, was not giving the handle the right reference count, so
+a double free could happen.
+
+=item *
+
+When deciding that a bareword was a method name, the parser would get confused
+if an C<our> sub with the same name existed, and look up the method in the
+package of the C<our> sub, instead of the package of the invocant.
+
+=item *
+
+The parser no longer gets confused by C<\U=> within a double-quoted string. It
+used to produce a syntax error, but now compiles it correctly.
+L<[perl #80368]|https://rt.perl.org/Ticket/Display.html?id=80368>
+
+=item *
+
+It has always been the intention for the C<-B> and C<-T> file test operators to
+treat UTF-8 encoded files as text. (L<perlfunc|perlfunc/-X FILEHANDLE> has
+been updated to say this.) Previously, it was possible for some files to be
+considered UTF-8 that actually weren't valid UTF-8. This is now fixed. The
+operators now work on EBCDIC platforms as well.
+
+=item *
+
+Under some conditions warning messages raised during regular expression pattern
+compilation were being output more than once. This has now been fixed.
+
+=item *
+
+Perl 5.20.0 introduced a regression in which a UTF-8 encoded regular
+expression pattern that contains a single ASCII lowercase letter did not
+match its uppercase counterpart. That has been fixed in both 5.20.1 and
+5.22.0.
+L<[perl #122655]|https://rt.perl.org/Ticket/Display.html?id=122655>
+
+=item *
+
+Constant folding could incorrectly suppress warnings if lexical warnings
+(C<use warnings> or C<no warnings>) were not in effect and C<$^W> were
+false at compile time and true at run time.
+
+=item *
+
+Loading Unicode tables during a regular expression match could cause assertion
+failures under debugging builds if the previous match used the very same
+regular expression.
+L<[perl #122747]|https://rt.perl.org/Ticket/Display.html?id=122747>
+
+=item *
+
+Thread cloning used to work incorrectly for lexical subs, possibly causing
+crashes or double frees on exit.
+
+=item *
+
+Since Perl 5.14.0, deleting C<$SomePackage::{__ANON__}> and then undefining an
+anonymous subroutine could corrupt things internally, resulting in
+L<Devel::Peek> crashing or L<B.pm|B> giving nonsensical data. This has been
+fixed.
+
+=item *
+
+S<C<(caller $n)[3]>> now reports names of lexical subs, instead of
+treating them as C<"(unknown)">.
+
+=item *
+
+C<sort subname LIST> now supports using a lexical sub as the comparison
+routine.
+
+=item *
+
+Aliasing (I<e.g.>, via S<C<*x = *y>>) could confuse list assignments that mention the
+two names for the same variable on either side, causing wrong values to be
+assigned.
+L<[perl #15667]|https://rt.perl.org/Ticket/Display.html?id=15667>
+
+=item *
+
+Long here-doc terminators could cause a bad read on short lines of input. This
+has been fixed. It is doubtful that any crash could have occurred. This bug
+goes back to when here-docs were introduced in Perl 3.000 twenty-five years
+ago.
+
+=item *
+
+An optimization in C<split> to treat S<C<split /^/>> like S<C<split /^/m>> had the
+unfortunate side-effect of also treating S<C<split /\A/>> like S<C<split /^/m>>,
+which it should not. This has been fixed. (Note, however, that S<C<split /^x/>>
+does not behave like S<C<split /^x/m>>, which is also considered to be a bug and
+will be fixed in a future version.)
+L<[perl #122761]|https://rt.perl.org/Ticket/Display.html?id=122761>
+
+=item *
+
+The little-known S<C<my Class $var>> syntax (see L<fields> and L<attributes>)
+could get confused in the scope of C<use utf8> if C<Class> were a constant
+whose value contained Latin-1 characters.
+
+=item *
+
+Locking and unlocking values via L<Hash::Util> or C<Internals::SvREADONLY>
+no longer has any effect on values that were read-only to begin with.
+Previously, unlocking such values could result in crashes, hangs or
+other erratic behavior.
+
+=item *
+
+Some unterminated C<(?(...)...)> constructs in regular expressions would
+either crash or give erroneous error messages. C</(?(1)/> is one such
+example.
+
+=item *
+
+S<C<pack "w", $tied>> no longer calls FETCH twice.
+
+=item *
+
+List assignments like S<C<($x, $z) = (1, $y)>> now work correctly if C<$x> and
+C<$y> have been aliased by C<foreach>.
+
+=item *
+
+Some patterns including code blocks with syntax errors, such as
+S<C</ (?{(^{})/>>, would hang or fail assertions on debugging builds. Now
+they produce errors.
+
+=item *
+
+An assertion failure when parsing C<sort> with debugging enabled has been
+fixed.
+L<[perl #122771]|https://rt.perl.org/Ticket/Display.html?id=122771>.
+
+=item *
+
+S<C<*a = *b; @a = split //, $b[1]>> could do a bad read and produce junk
+results.
+
+=item *
+
+In S<C<() = @array = split>>, the S<C<() =>> at the beginning no longer confuses
+the optimizer into assuming a limit of 1.
+
+=item *
+
+Fatal warnings no longer prevent the output of syntax errors.
+L<[perl #122966]|https://rt.perl.org/Ticket/Display.html?id=122966>.
+
+=item *
+
+Fixed a NaN double-to-long-double conversion error on VMS. For quiet NaNs
+(and only on Itanium, not Alpha) negative infinity instead of NaN was
+produced.
+
+=item *
+
+Fixed the issue that caused C<< make distclean >> to incorrectly leave some
+files behind.
+L<[perl #122820]|https://rt.perl.org/Ticket/Display.html?id=122820>.
+
+=item *
+
+AIX now sets the length in C<< getsockopt >> correctly.
+L<[perl #120835]|https://rt.perl.org/Ticket/Display.html?id=120835>.
+L<[cpan #91183]|https://rt.cpan.org/Ticket/Display.html?id=91183>.
+L<[cpan #85570]|https://rt.cpan.org/Ticket/Display.html?id=85570>.
+
+=item *
+
+The optimization phase of a regexp compilation could run "forever" and
+exhaust all memory under certain circumstances; now fixed.
+L<[perl #122283]|https://rt.perl.org/Ticket/Display.html?id=122283>.
+
+=item *
+
+The test script F<< t/op/crypt.t >> now uses the SHA-256 algorithm if the
+default one is disabled, rather than giving failures.
+L<[perl #121591]|https://rt.perl.org/Ticket/Display.html?id=121591>.
+
+=item *
+
+Fixed an off-by-one error when setting the size of a shared array.
+L<[perl #122950]|https://rt.perl.org/Ticket/Display.html?id=122950>.
+
+=item *
+
+Fixed a bug that could cause perl to enter an infinite loop during
+compilation. In particular, a C<while(1)> within a sublist, I<e.g.>
+
+ sub foo { () = ($a, my $b, ($c, do { while(1) {} })) }
+
+The bug was introduced in 5.20.0
+L<[perl #122995]|https://rt.perl.org/Ticket/Display.html?id=122995>.
+
+=item *
+
+On Win32, if a variable was C<local>-ized in a pseudo-process that later
+forked, restoring the original value in the child pseudo-process caused
+memory corruption and a crash in the child pseudo-process (and therefore the
+OS process).
+L<[perl #40565]|https://rt.perl.org/Ticket/Display.html?id=40565>.
+
+=item *
+
+Calling C<write> on a format with a C<^**> field could produce a panic
+in C<sv_chop()> if there were insufficient arguments or if the variable
+used to fill the field was empty.
+L<[perl #123245]|https://rt.perl.org/Ticket/Display.html?id=123245>.
+
+=item *
+
+Non-ASCII lexical sub names now appear without trailing junk when they
+appear in error messages.
+
+=item *
+
+The C<\@> subroutine prototype no longer flattens parenthesized arrays
+(taking a reference to each element), but takes a reference to the array
+itself.
+L<[perl #47363]|https://rt.perl.org/Ticket/Display.html?id=47363>.
+
+=item *
+
+A block containing nothing except a C-style C<for> loop could corrupt the
+stack, causing lists outside the block to lose elements or have elements
+overwritten. This could happen with C<map { for(...){...} } ...> and with
+lists containing C<do { for(...){...} }>.
+L<[perl #123286]|https://rt.perl.org/Ticket/Display.html?id=123286>.
+
+=item *
+
+C<scalar()> now propagates lvalue context, so that
+S<C<for(scalar($#foo)) { ... }>> can modify C<$#foo> through C<$_>.
+
+=item *
+
+C<qr/@array(?{block})/> no longer dies with "Bizarre copy of ARRAY".
+L<[perl #123344]|https://rt.perl.org/Ticket/Display.html?id=123344>.
+
+=item *
+
+S<C<eval '$variable'>> in nested named subroutines would sometimes look up a
+global variable even with a lexical variable in scope.
+
+=item *
+
+In perl 5.20.0, C<sort CORE::fake> where 'fake' is anything other than a
+keyword, started chopping off the last 6 characters and treating the result
+as a sort sub name. The previous behavior of treating C<CORE::fake> as a
+sort sub name has been restored.
+L<[perl #123410]|https://rt.perl.org/Ticket/Display.html?id=123410>.
+
+=item *
+
+Outside of C<use utf8>, a single-character Latin-1 lexical variable is
+disallowed. The error message for it, "Can't use global C<$foo>...", was
+giving garbage instead of the variable name.
+
+=item *
+
+C<readline> on a nonexistent handle was causing C<${^LAST_FH}> to produce a
+reference to an undefined scalar (or fail an assertion). Now
+C<${^LAST_FH}> ends up undefined.
+
+=item *
+
+C<(...) x ...> in void context now applies scalar context to the left-hand
+argument, instead of the context the current sub was called in.
+L<[perl #123020]|https://rt.perl.org/Ticket/Display.html?id=123020>.
+
+=back
+
+=head1 Known Problems
+
+=over 4
+
+=item *
+
+C<pack>-ing a NaN on a perl compiled with Visual C 6 does not behave properly,
+leading to a test failure in F<t/op/infnan.t>.
+L<[perl 125203]|https://rt.perl.org/Ticket/Display.html?id=125203>
+
+=item *
+
+A goal is for Perl to be able to be recompiled to work reasonably well on any
+Unicode version. In Perl 5.22, though, the earliest such version is Unicode
+5.1 (current is 7.0).
+
+=item *
+
+EBCDIC platforms
+
+=over 4
+
+=item *
+
+The C<cmp> (and hence C<sort>) operators do not necessarily give the
+correct results when both operands are UTF-EBCDIC encoded strings and
+there is a mixture of ASCII and/or control characters, along with other
+characters.
+
+=item *
+
+Ranges containing C<\N{...}> in the C<tr///> (and C<y///>)
+transliteration operators are treated differently than the equivalent
+ranges in regular expression patterns. They should, but don't, cause
+the values in the ranges to all be treated as Unicode code points, and
+not native ones. (L<perlre/Version 8 Regular Expressions> gives
+details as to how it should work.)
+
+=item *
+
+Encode and encoding are mostly broken.
+
+=item *
+
+Many CPAN modules that are shipped with core show failing tests.
+
+=item *
+
+C<pack>/C<unpack> with C<"U0"> format may not work properly.
+
+=back
+
+=item *
+
+The following modules are known to have test failures with this version of
+Perl. In many cases, patches have been submitted, so there will hopefully be
+new releases soon:
+
+=over
+
+=item *
+
+L<B::Generate> version 1.50
+
+=item *
+
+L<B::Utils> version 0.25
+
+=item *
+
+L<Coro> version 6.42
+
+=item *
+
+L<Dancer> version 1.3130
+
+=item *
+
+L<Data::Alias> version 1.18
+
+=item *
+
+L<Data::Dump::Streamer> version 2.38
+
+=item *
+
+L<Data::Util> version 0.63
+
+=item *
+
+L<Devel::Spy> version 0.07
+
+=item *
+
+L<invoker> version 0.34
+
+=item *
+
+L<Lexical::Var> version 0.009
+
+=item *
+
+L<LWP::ConsoleLogger> version 0.000018
+
+=item *
+
+L<Mason> version 2.22
+
+=item *
+
+L<NgxQueue> version 0.02
+
+=item *
+
+L<Padre> version 1.00
+
+=item *
+
+L<Parse::Keyword> 0.08
+
+=back
+
+=back
+
+=head1 Obituary
+
+Brian McCauley died on May 8, 2015. He was a frequent poster to Usenet, Perl
+Monks, and other Perl forums, and made several CPAN contributions under the
+nick NOBULL, including to the Perl FAQ. He attended almost every
+YAPC::Europe, and indeed, helped organise YAPC::Europe 2006 and the QA
+Hackathon 2009. His wit and his delight in intricate systems were
+particularly apparent in his love of board games; many Perl mongers will
+have fond memories of playing Fluxx and other games with Brian. He will be
+missed.
+
+=head1 Acknowledgements
+
+Perl 5.22.0 represents approximately 12 months of development since Perl 5.20.0
+and contains approximately 590,000 lines of changes across 2,400 files from 94
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 370,000 lines of changes to 1,500 .pm, .t, .c and .h files.
+
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers. The following people are known to have contributed the
+improvements that became Perl 5.22.0:
+
+Aaron Crane, Abhijit Menon-Sen, Abigail, Alberto Simões, Alex Solovey, Alex
+Vandiver, Alexandr Ciornii, Alexandre (Midnite) Jousset, Andreas König,
+Andreas Voegele, Andrew Fresh, Andy Dougherty, Anthony Heading, Aristotle
+Pagaltzis, brian d foy, Brian Fraser, Chad Granum, Chris 'BinGOs' Williams,
+Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, Darin McBride, Dave
+Rolsky, David Golden, David Mitchell, David Wheeler, Dmitri Tikhonov, Doug
+Bell, E. Choroba, Ed J, Eric Herman, Father Chrysostomos, George Greer, Glenn
+D. Golden, Graham Knop, H.Merijn Brand, Herbert Breunung, Hugo van der Sanden,
+James E Keenan, James McCoy, James Raspass, Jan Dubois, Jarkko Hietaniemi,
+Jasmine Ngan, Jerry D. Hedden, Jim Cromie, John Goodyear, kafka, Karen
+Etheridge, Karl Williamson, Kent Fredric, kmx, Lajos Veres, Leon Timmermans,
+Lukas Mai, Mathieu Arnold, Matthew Horsfall, Max Maischein, Michael Bunk,
+Nicholas Clark, Niels Thykier, Niko Tyni, Norman Koch, Olivier Mengué, Peter
+John Acklam, Peter Martini, Petr Písař, Philippe Bruhat (BooK), Pierre
+Bogossian, Rafael Garcia-Suarez, Randy Stauner, Reini Urban, Ricardo Signes,
+Rob Hoelz, Rostislav Skudnov, Sawyer X, Shirakata Kentaro, Shlomi Fish,
+Sisyphus, Slaven Rezic, Smylers, Steffen Müller, Steve Hay, Sullivan Beck,
+syber, Tadeusz Sośnierz, Thomas Sibley, Todd Rinaldo, Tony Cook, Vincent Pit,
+Vladimir Marek, Yaroslav Kuzmin, Yves Orton, Ævar Arnfjörð Bjarmason.
+
+The list above is almost certainly incomplete as it is automatically generated
+from version control history. In particular, it does not include the names of
+the (very much appreciated) contributors who reported issues to the Perl bug
+tracker.
+
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core. We're grateful to the entire CPAN community for
+helping Perl to flourish.
+
+For a more complete list of all of Perl's historical contributors, please see
+the F<AUTHORS> file in the Perl source distribution.
+
+=head1 Reporting Bugs
+
+If you find what you think is a bug, you might check the articles recently
+posted to the comp.lang.perl.misc newsgroup and the perl bug database at
+L<https://rt.perl.org/>. There may also be information at
+L<http://www.perl.org/>, the Perl Home Page.
+
+If you believe you have an unreported bug, please run the L<perlbug> program
+included with your release. Be sure to trim your bug down to a tiny but
+sufficient test case. Your bug report, along with the output of C<perl -V>,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+
+If the bug you are reporting has security implications, which make it
+inappropriate to send to a publicly archived mailing list, then please send it
+to perl5-security-report@perl.org. This points to a closed subscription
+unarchived mailing list, which includes all the core committers, who will be
+able to help assess the impact of issues, figure out a resolution, and help
+co-ordinate the release of patches to mitigate or fix the problem across all
+platforms on which Perl is supported. Please only use this address for
+security issues in the Perl core, not for modules independently distributed on
+CPAN.
+
+=head1 SEE ALSO
+
+The F<Changes> file for an explanation of how to view exhaustive details on
+what changed.
+
+The F<INSTALL> file for how to build Perl.
+
+The F<README> file for general stuff.
+
+The F<Artistic> and F<Copying> files for copyright information.
+
+=cut
=item L<http://perl.com/>
-Run by O'Reilly Media (the publisher of L<the Camel Book|perlbook>, among other
-Perl-related literature), perl.com provides current Perl news, articles, and
-resources for Perl developers as well as a directory of other useful websites.
+Originally run by O'Reilly Media (the publisher of L<the Camel Book|perlbook>,
+this site provides quality articles mostly about technical details of Perl.
=item L<http://blogs.perl.org/>
Many members of the community have a Perl-related blog on this site. If
you'd like to join them, you can sign up for free.
+=item L<http://perlsphere.net/>
+
+Perlsphere is one of several aggregators of Perl-related blog feeds.
+
+=item L<http://perlweekly.com/>
+
+Perl Weekly is a weekly mailing list that keeps you up to date on conferences,
+releases and notable blog posts.
+
=item L<http://use.perl.org/>
use Perl; used to provide a slashdot-style news/blog website covering all
focussed solely on Perl, but it does have an active group of users who do
their best to help people with their Perl programming questions.
+=item L<http://prepan.org/>
+
+PrePAN is used as a place to discuss modules that you're considering uploading
+to the CPAN. You can get feedback on their design before you upload.
+
=back
=head2 User Groups
=item *
-A sigil, followed by either a caret and a single POSIX uppercase letter,
-like C<$^V> or C<$^W>, or a sigil followed by a literal non-space,
+A sigil, followed by a caret and any one of the characters
+C<[][A-Z^_?\]>, like C<$^V> or C<$^]>, or a sigil followed by a literal non-space,
non-C<NUL> control character matching the C<\p{POSIX_Cntrl}> property.
Due to a historical oddity, if not running under C<use utf8>, the 128
characters in the C<[0x80-0xff]> range are considered to be controls,
=item *
-Similar to the above, a sigil, followed by bareword text in brackets,
-where the first character is either a caret followed by an uppercase
-letter, like C<${^GLOBAL_PHASE}> or a non-C<NUL>, non-space literal
+Similar to the above, a sigil, followed by bareword text in braces,
+where the first character is either a caret followed by any one of
+the characters C<[][A-Z^_?\]>, like C<${^GLOBAL_PHASE}>, or a non-C<NUL>,
+non-space literal
control like C<${\7LOBAL_PHASE}>. Like the above, when not under
C<"use utf8">, the characters in C<[0x80-0xFF]> are considered controls, but as
of v5.22, the use of any that are non-graphical are deprecated, and as
=head1 NAME
-perldelta - what is new for perl v5.22.0
+perldelta - what is new for perl v5.22.1
=head1 DESCRIPTION
-This document describes differences between the 5.20.0 release and the 5.22.0
+This document describes differences between the 5.22.0 release and the 5.22.1
release.
-If you are upgrading from an earlier release such as 5.18.0, first read
-L<perl5200delta>, which describes differences between 5.18.0 and 5.20.0.
+If you are upgrading from an earlier release such as 5.20.0, first read
+L<perl5220delta>, which describes differences between 5.20.0 and 5.22.0.
-=head1 Core Enhancements
-
-=head2 New bitwise operators
-
-A new experimental facility has been added that makes the four standard
-bitwise operators (C<& | ^ ~>) treat their operands consistently as
-numbers, and introduces four new dotted operators (C<&. |. ^. ~.>) that
-treat their operands consistently as strings. The same applies to the
-assignment variants (C<&= |= ^= &.= |.= ^.=>).
-
-To use this, enable the "bitwise" feature and disable the
-"experimental::bitwise" warnings category. See L<perlop/Bitwise String
-Operators> for details.
-L<[perl #123466]|https://rt.perl.org/Ticket/Display.html?id=123466>.
-
-=head2 New double-diamond operator
-
-C<<< <<>> >>> is like C<< <> >> but uses three-argument C<open> to open
-each file in C<@ARGV>. This means that each element of C<@ARGV> will be treated
-as an actual file name, and C<"|foo"> won't be treated as a pipe open.
-
-=head2 New C<\b> boundaries in regular expressions
-
-=head3 C<qr/\b{gcb}/>
-
-C<gcb> stands for Grapheme Cluster Boundary. It is a Unicode property
-that finds the boundary between sequences of characters that look like a
-single character to a native speaker of a language. Perl has long had
-the ability to deal with these through the C<\X> regular escape
-sequence. Now, there is an alternative way of handling these. See
-L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
-
-=head3 C<qr/\b{wb}/>
-
-C<wb> stands for Word Boundary. It is a Unicode property
-that finds the boundary between words. This is similar to the plain
-C<\b> (without braces) but is more suitable for natural language
-processing. It knows, for example, that apostrophes can occur in the
-middle of words. See L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
-
-=head3 C<qr/\b{sb}/>
-
-C<sb> stands for Sentence Boundary. It is a Unicode property
-to aid in parsing natural language sentences.
-See L<perlrebackslash/\b{}, \b, \B{}, \B> for details.
-
-=head2 Non-Capturing Regular Expression Flag
-
-Regular expressions now support a C</n> flag that disables capturing
-and filling in C<$1>, C<$2>, etc inside of groups:
-
- "hello" =~ /(hi|hello)/n; # $1 is not set
-
-This is equivalent to putting C<?:> at the beginning of every capturing group.
-
-See L<perlre/"n"> for more information.
-
-=head2 C<use re 'strict'>
-
-This applies stricter syntax rules to regular expression patterns
-compiled within its scope. This will hopefully alert you to typos and
-other unintentional behavior that backwards-compatibility issues prevent
-us from reporting in normal regular expression compilations. Because the
-behavior of this is subject to change in future Perl releases as we gain
-experience, using this pragma will raise a warning of category
-C<experimental::re_strict>.
-See L<'strict' in re|re/'strict' mode>.
-
-=head2 Unicode 7.0 (with correction) is now supported
-
-For details on what is in this release, see
-L<http://www.unicode.org/versions/Unicode7.0.0/>.
-The version of Unicode 7.0 that comes with Perl includes
-a correction dealing with glyph shaping in Arabic
-(see L<http://www.unicode.org/errata/#current_errata>).
-
-
-=head2 S<C<use locale>> can restrict which locale categories are affected
-
-It is now possible to pass a parameter to S<C<use locale>> to specify
-a subset of locale categories to be locale-aware, with the remaining
-ones unaffected. See L<perllocale/The "use locale" pragma> for details.
-
-=head2 Perl now supports POSIX 2008 locale currency additions
-
-On platforms that are able to handle POSIX.1-2008, the
-hash returned by
-L<C<POSIX::localeconv()>|perllocale/The localeconv function>
-includes the international currency fields added by that version of the
-POSIX standard. These are
-C<int_n_cs_precedes>,
-C<int_n_sep_by_space>,
-C<int_n_sign_posn>,
-C<int_p_cs_precedes>,
-C<int_p_sep_by_space>,
-and
-C<int_p_sign_posn>.
-
-=head2 Better heuristics on older platforms for determining locale UTF-8ness
-
-On platforms that implement neither the C99 standard nor the POSIX 2001
-standard, determining if the current locale is UTF-8 or not depends on
-heuristics. These are improved in this release.
-
-=head2 Aliasing via reference
-
-Variables and subroutines can now be aliased by assigning to a reference:
-
- \$c = \$d;
- \&x = \&y;
-
-Aliasing can also be accomplished
-by using a backslash before a C<foreach> iterator variable; this is
-perhaps the most useful idiom this feature provides:
-
- foreach \%hash (@array_of_hash_refs) { ... }
-
-This feature is experimental and must be enabled via S<C<use feature
-'refaliasing'>>. It will warn unless the C<experimental::refaliasing>
-warnings category is disabled.
-
-See L<perlref/Assigning to References>
-
-=head2 C<prototype> with no arguments
-
-C<prototype()> with no arguments now infers C<$_>.
-L<[perl #123514]|https://rt.perl.org/Ticket/Display.html?id=123514>.
-
-=head2 New C<:const> subroutine attribute
-
-The C<const> attribute can be applied to an anonymous subroutine. It
-causes the new sub to be executed immediately whenever one is created
-(I<i.e.> when the C<sub> expression is evaluated). Its value is captured
-and used to create a new constant subroutine that is returned. This
-feature is experimental. See L<perlsub/Constant Functions>.
-
-=head2 C<fileno> now works on directory handles
-
-When the relevant support is available in the operating system, the
-C<fileno> builtin now works on directory handles, yielding the
-underlying file descriptor in the same way as for filehandles. On
-operating systems without such support, C<fileno> on a directory handle
-continues to return the undefined value, as before, but also sets C<$!> to
-indicate that the operation is not supported.
-
-Currently, this uses either a C<dd_fd> member in the OS C<DIR>
-structure, or a C<dirfd(3)> function as specified by POSIX.1-2008.
-
-=head2 List form of pipe open implemented for Win32
-
-The list form of pipe:
-
- open my $fh, "-|", "program", @arguments;
-
-is now implemented on Win32. It has the same limitations as C<system
-LIST> on Win32, since the Win32 API doesn't accept program arguments
-as a list.
-
-=head2 Assignment to list repetition
-
-C<(...) x ...> can now be used within a list that is assigned to, as long
-as the left-hand side is a valid lvalue. This allows S<C<(undef,undef,$foo)
-= that_function()>> to be written as S<C<((undef)x2, $foo) = that_function()>>.
-
-=head2 Infinity and NaN (not-a-number) handling improved
-
-Floating point values are able to hold the special values infinity, negative
-infinity, and NaN (not-a-number). Now we more robustly recognize and
-propagate the value in computations, and on output normalize them to the strings
-C<Inf>, C<-Inf>, and C<NaN>.
-
-See also the L<POSIX> enhancements.
-
-=head2 Floating point parsing has been improved
-
-Parsing and printing of floating point values has been improved.
-
-As a completely new feature, hexadecimal floating point literals
-(like C<0x1.23p-4>) are now supported, and they can be output with
-S<C<printf "%a">>. See L<perldata/Scalar value constructors> for more
-details.
-
-=head2 Packing infinity or not-a-number into a character is now fatal
-
-Before, when trying to pack infinity or not-a-number into a
-(signed) character, Perl would warn, and assumed you tried to
-pack C<< 0xFF >>; if you gave it as an argument to C<< chr >>,
-C<< U+FFFD >> was returned.
-
-But now, all such actions (C<< pack >>, C<< chr >>, and C<< print '%c' >>)
-result in a fatal error.
-
-=head2 Experimental C Backtrace API
-
-Perl now supports (via a C level API) retrieving
-the C level backtrace (similar to what symbolic debuggers like gdb do).
-
-The backtrace returns the stack trace of the C call frames,
-with the symbol names (function names), the object names (like "perl"),
-and if it can, also the source code locations (file:line).
-
-The supported platforms are Linux and OS X (some *BSD might work at
-least partly, but they have not yet been tested).
-
-The feature needs to be enabled with C<Configure -Dusecbacktrace>.
-
-See L<perlhacktips/"C backtrace"> for more information.
-
-=head1 Security
-
-=head2 Perl is now compiled with C<-fstack-protector-strong> if available
-
-Perl has been compiled with the anti-stack-smashing option
-C<-fstack-protector> since 5.10.1. Now Perl uses the newer variant
-called C<-fstack-protector-strong>, if available.
-
-=head2 The L<Safe> module could allow outside packages to be replaced
-
-Critical bugfix: outside packages could be replaced. L<Safe> has
-been patched to 2.38 to address this.
-
-=head2 Perl is now always compiled with C<-D_FORTIFY_SOURCE=2> if available
-
-The 'code hardening' option called C<_FORTIFY_SOURCE>, available in
-gcc 4.*, is now always used for compiling Perl, if available.
-
-Note that this isn't necessarily a huge step since in many platforms
-the step had already been taken several years ago: many Linux
-distributions (like Fedora) have been using this option for Perl,
-and OS X has enforced the same for many years.
-
-=head1 Incompatible Changes
-
-=head2 Subroutine signatures moved before attributes
-
-The experimental sub signatures feature, as introduced in 5.20, parsed
-signatures after attributes. In this release, following feedback from users
-of the experimental feature, the positioning has been moved such that
-signatures occur after the subroutine name (if any) and before the attribute
-list (if any).
-
-=head2 C<&> and C<\&> prototypes accepts only subs
-
-The C<&> prototype character now accepts only anonymous subs (C<sub
-{...}>), things beginning with C<\&>, or an explicit C<undef>. Formerly
-it erroneously also allowed references to arrays, hashes, and lists.
-L<[perl #4539]|https://rt.perl.org/Ticket/Display.html?id=4539>.
-L<[perl #123062]|https://rt.perl.org/Ticket/Display.html?id=123062>.
-L<[perl #123062]|https://rt.perl.org/Ticket/Display.html?id=123475>.
-
-In addition, the C<\&> prototype was allowing subroutine calls, whereas
-now it only allows subroutines: C<&foo> is still permitted as an argument,
-while C<&foo()> and C<foo()> no longer are.
-L<[perl #77860]|https://rt.perl.org/Ticket/Display.html?id=77860>.
-
-=head2 C<use encoding> is now lexical
-
-The L<encoding> pragma's effect is now limited to lexical scope. This
-pragma is deprecated, but in the meantime, it could adversely affect
-unrelated modules that are included in the same program; this change
-fixes that.
-
-=head2 List slices returning empty lists
-
-List slices now return an empty list only if the original list was empty
-(or if there are no indices). Formerly, a list slice would return an empty
-list if all indices fell outside the original list; now it returns a list
-of C<undef> values in that case.
-L<[perl #114498]|https://rt.perl.org/Ticket/Display.html?id=114498>.
-
-=head2 C<\N{}> with a sequence of multiple spaces is now a fatal error
-
-E.g. S<C<\N{TOOE<nbsp>E<nbsp>MANY SPACES}>> or S<C<\N{TRAILING SPACE }>>.
-This has been deprecated since v5.18.
-
-=head2 S<C<use UNIVERSAL '...'>> is now a fatal error
-
-Importing functions from C<UNIVERSAL> has been deprecated since v5.12, and
-is now a fatal error. S<C<use UNIVERSAL>> without any arguments is still
-allowed.
-
-=head2 In double-quotish C<\cI<X>>, I<X> must now be a printable ASCII character
-
-In prior releases, failure to do this raised a deprecation warning.
-
-=head2 Splitting the tokens C<(?> and C<(*> in regular expressions is now a fatal compilation error.
-
-These had been deprecated since v5.18.
-
-=head2 C<qr/foo/x> now ignores all Unicode pattern white space
-
-The C</x> regular expression modifier allows the pattern to contain
-white space and comments (both of which are ignored) for improved
-readability. Until now, not all the white space characters that Unicode
-designates for this purpose were handled. The additional ones now
-recognized are:
-
- U+0085 NEXT LINE
- U+200E LEFT-TO-RIGHT MARK
- U+200F RIGHT-TO-LEFT MARK
- U+2028 LINE SEPARATOR
- U+2029 PARAGRAPH SEPARATOR
-
-The use of these characters with C</x> outside bracketed character
-classes and when not preceded by a backslash has raised a deprecation
-warning since v5.18. Now they will be ignored.
-
-=head2 Comment lines within S<C<(?[ ])>> are now ended only by a C<\n>
-
-S<C<(?[ ])>> is an experimental feature, introduced in v5.18. It operates
-as if C</x> is always enabled. But there was a difference: comment
-lines (following a C<#> character) were terminated by anything matching
-C<\R> which includes all vertical whitespace, such as form feeds. For
-consistency, this is now changed to match what terminates comment lines
-outside S<C<(?[ ])>>, namely a C<\n> (even if escaped), which is the
-same as what terminates a heredoc string and formats.
-
-=head2 C<(?[...])> operators now follow standard Perl precedence
-
-This experimental feature allows set operations in regular expression patterns.
-Prior to this, the intersection operator had the same precedence as the other
-binary operators. Now it has higher precedence. This could lead to different
-outcomes than existing code expects (though the documentation has always noted
-that this change might happen, recommending fully parenthesizing the
-expressions). See L<perlrecharclass/Extended Bracketed Character Classes>.
-
-=head2 Omitting C<%> and C<@> on hash and array names is no longer permitted
-
-Really old Perl let you omit the C<@> on array names and the C<%> on hash
-names in some spots. This has issued a deprecation warning since Perl
-5.000, and is no longer permitted.
-
-=head2 C<"$!"> text is now in English outside the scope of C<use locale>
-
-Previously, the text, unlike almost everything else, always came out
-based on the current underlying locale of the program. (Also affected
-on some systems is C<"$^E">.) For programs that are unprepared to
-handle locale differences, this can cause garbage text to be displayed.
-It's better to display text that is translatable via some tool than
-garbage text which is much harder to figure out.
-
-=head2 C<"$!"> text will be returned in UTF-8 when appropriate
-
-The stringification of C<$!> and C<$^E> will have the UTF-8 flag set
-when the text is actually non-ASCII UTF-8. This will enable programs
-that are set up to be locale-aware to properly output messages in the
-user's native language. Code that needs to continue the 5.20 and
-earlier behavior can do the stringification within the scopes of both
-S<C<use bytes>> and S<C<use locale ":messages">>. Within these two
-scopes, no other Perl operations will
-be affected by locale; only C<$!> and C<$^E> stringification. The
-C<bytes> pragma causes the UTF-8 flag to not be set, just as in previous
-Perl releases. This resolves
-L<[perl #112208]|https://rt.perl.org/Ticket/Display.html?id=112208>.
-
-=head2 Support for C<?PATTERN?> without explicit operator has been removed
-
-The C<m?PATTERN?> construct, which allows matching a regex only once,
-previously had an alternative form that was written directly with a question
-mark delimiter, omitting the explicit C<m> operator. This usage has produced
-a deprecation warning since 5.14.0. It is now a syntax error, so that the
-question mark can be available for use in new operators.
-
-=head2 C<defined(@array)> and C<defined(%hash)> are now fatal errors
-
-These have been deprecated since v5.6.1 and have raised deprecation
-warnings since v5.16.
-
-=head2 Using a hash or an array as a reference are now fatal errors
-
-For example, C<< %foo->{"bar"} >> now causes a fatal compilation
-error. These have been deprecated since before v5.8, and have raised
-deprecation warnings since then.
-
-=head2 Changes to the C<*> prototype
-
-The C<*> character in a subroutine's prototype used to allow barewords to take
-precedence over most, but not all, subroutine names. It was never
-consistent and exhibited buggy behavior.
-
-Now it has been changed, so subroutines always take precedence over barewords,
-which brings it into conformity with similarly prototyped built-in functions:
-
- sub splat(*) { ... }
- sub foo { ... }
- splat(foo); # now always splat(foo())
- splat(bar); # still splat('bar') as before
- close(foo); # close(foo())
- close(bar); # close('bar')
-
-=head1 Deprecations
-
-=head2 Setting C<${^ENCODING}> to anything but C<undef>
-
-This variable allows Perl scripts to be written in an encoding other than
-ASCII or UTF-8. However, it affects all modules globally, leading
-to wrong answers and segmentation faults. New scripts should be written
-in UTF-8; old scripts should be converted to UTF-8, which is easily done
-with the L<piconv> utility.
-
-=head2 Use of non-graphic characters in single-character variable names
-
-The syntax for single-character variable names is more lenient than
-for longer variable names, allowing the one-character name to be a
-punctuation character or even invisible (a non-graphic). Perl v5.20
-deprecated the ASCII-range controls as such a name. Now, all
-non-graphic characters that formerly were allowed are deprecated.
-The practical effect of this occurs only when not under C<S<use
-utf8>>, and affects just the C1 controls (code points 0x80 through
-0xFF), NO-BREAK SPACE, and SOFT HYPHEN.
-
-=head2 Inlining of C<sub () { $var }> with observable side-effects
-
-In many cases Perl makes S<C<sub () { $var }>> into an inlinable constant
-subroutine, capturing the value of C<$var> at the time the C<sub> expression
-is evaluated. This can break the closure behavior in those cases where
-C<$var> is subsequently modified, since the subroutine won't return the
-changed value. (Note that this all only applies to anonymous subroutines
-with an empty prototype (S<C<sub ()>>).)
-
-This usage is now deprecated in those cases where the variable could be
-modified elsewhere. Perl detects those cases and emits a deprecation
-warning. Such code will likely change in the future and stop producing a
-constant.
-
-If your variable is only modified in the place where it is declared, then
-Perl will continue to make the sub inlinable with no warnings.
-
- sub make_constant {
- my $var = shift;
- return sub () { $var }; # fine
- }
-
- sub make_constant_deprecated {
- my $var;
- $var = shift;
- return sub () { $var }; # deprecated
- }
-
- sub make_constant_deprecated2 {
- my $var = shift;
- log_that_value($var); # could modify $var
- return sub () { $var }; # deprecated
- }
-
-In the second example above, detecting that C<$var> is assigned to only once
-is too hard to detect. That it happens in a spot other than the C<my>
-declaration is enough for Perl to find it suspicious.
-
-This deprecation warning happens only for a simple variable for the body of
-the sub. (A C<BEGIN> block or C<use> statement inside the sub is ignored,
-because it does not become part of the sub's body.) For more complex
-cases, such as S<C<sub () { do_something() if 0; $var }>> the behavior has
-changed such that inlining does not happen if the variable is modifiable
-elsewhere. Such cases should be rare.
-
-=head2 Use of multiple C</x> regexp modifiers
-
-It is now deprecated to say something like any of the following:
-
- qr/foo/xx;
- /(?xax:foo)/;
- use re qw(/amxx);
-
-That is, now C<x> should only occur once in any string of contiguous
-regular expression pattern modifiers. We do not believe there are any
-occurrences of this in all of CPAN. This is in preparation for a future
-Perl release having C</xx> permit white-space for readability in
-bracketed character classes (those enclosed in square brackets:
-C<[...]>).
-
-=head2 Using a NO-BREAK space in a character alias for C<\N{...}> is now deprecated
-
-This non-graphic character is essentially indistinguishable from a
-regular space, and so should not be allowed. See
-L<charnames/CUSTOM ALIASES>.
-
-=head2 A literal C<"{"> should now be escaped in a pattern
-
-If you want a literal left curly bracket (also called a left brace) in a
-regular expression pattern, you should now escape it by either
-preceding it with a backslash (C<"\{">) or enclosing it within square
-brackets C<"[{]">, or by using C<\Q>; otherwise a deprecation warning
-will be raised. This was first announced as forthcoming in the v5.16
-release; it will allow future extensions to the language to happen.
-
-=head2 Making all warnings fatal is discouraged
-
-The documentation for L<fatal warnings|warnings/Fatal Warnings> notes that
-C<< use warnings FATAL => 'all' >> is discouraged, and provides stronger
-language about the risks of fatal warnings in general.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-If a method or class name is known at compile time, a hash is precomputed
-to speed up run-time method lookup. Also, compound method names like
-C<SUPER::new> are parsed at compile time, to save having to parse them at
-run time.
-
-=item *
-
-Array and hash lookups (especially nested ones) that use only constants
-or simple variables as keys, are now considerably faster. See
-L</Internal Changes> for more details.
-
-=item *
-
-C<(...)x1>, C<("constant")x0> and C<($scalar)x0> are now optimised in list
-context. If the right-hand argument is a constant 1, the repetition
-operator disappears. If the right-hand argument is a constant 0, the whole
-expression is optimised to the empty list, so long as the left-hand
-argument is a simple scalar or constant. (That is, C<(foo())x0> is not
-subject to this optimisation.)
-
-=item *
-
-C<substr> assignment is now optimised into 4-argument C<substr> at the end
-of a subroutine (or as the argument to C<return>). Previously, this
-optimisation only happened in void context.
-
-=item *
-
-In C<"\L...">, C<"\Q...">, etc., the extra "stringify" op is now optimised
-away, making these just as fast as C<lcfirst>, C<quotemeta>, etc.
-
-=item *
-
-Assignment to an empty list is now sometimes faster. In particular, it
-never calls C<FETCH> on tied arguments on the right-hand side, whereas it
-used to sometimes.
-
-=item *
-
-There is a performance improvement of up to 20% when C<length> is applied to
-a non-magical, non-tied string, and either C<use bytes> is in scope or the
-string doesn't use UTF-8 internally.
-
-=item *
-
-On most perl builds with 64-bit integers, memory usage for non-magical,
-non-tied scalars containing only a floating point value has been reduced
-by between 8 and 32 bytes, depending on OS.
-
-=item *
-
-In C<@array = split>, the assignment can be optimized away, so that C<split>
-writes directly to the array. This optimisation was happening only for
-package arrays other than C<@_>, and only sometimes. Now this
-optimisation happens almost all the time.
-
-=item *
-
-C<join> is now subject to constant folding. So for example
-S<C<join "-", "a", "b">> is converted at compile-time to C<"a-b">.
-Moreover, C<join> with a scalar or constant for the separator and a
-single-item list to join is simplified to a stringification, and the
-separator doesn't even get evaluated.
-
-=item *
-
-C<qq(@array)> is implemented using two ops: a stringify op and a join op.
-If the C<qq> contains nothing but a single array, the stringification is
-optimized away.
-
-=item *
-
-S<C<our $var>> and S<C<our($s,@a,%h)>> in void context are no longer evaluated at
-run time. Even a whole sequence of S<C<our $foo;>> statements will simply be
-skipped over. The same applies to C<state> variables.
-
-=item *
-
-Many internal functions have been refactored to improve performance and reduce
-their memory footprints.
-L<[perl #121436]|https://rt.perl.org/Ticket/Display.html?id=121436>
-L<[perl #121906]|https://rt.perl.org/Ticket/Display.html?id=121906>
-L<[perl #121969]|https://rt.perl.org/Ticket/Display.html?id=121969>
-
-=item *
-
-C<-T> and C<-B> filetests will return sooner when an empty file is detected.
-L<[perl #121489]|https://rt.perl.org/Ticket/Display.html?id=121489>
-
-=item *
-
-Hash lookups where the key is a constant are faster.
-
-=item *
-
-Subroutines with an empty prototype and a body containing just C<undef> are now
-eligible for inlining.
-L<[perl #122728]|https://rt.perl.org/Ticket/Display.html?id=122728>
-
-=item *
-
-Subroutines in packages no longer need to be stored in typeglobs:
-declaring a subroutine will now put a simple sub reference directly in the
-stash if possible, saving memory. The typeglob still notionally exists,
-so accessing it will cause the stash entry to be upgraded to a typeglob
-(I<i.e.> this is just an internal implementation detail).
-This optimization does not currently apply to XSUBs or exported
-subroutines, and method calls will undo it, since they cache things in
-typeglobs.
-L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
-
-=item *
-
-The functions C<utf8::native_to_unicode()> and C<utf8::unicode_to_native()>
-(see L<utf8>) are now optimized out on ASCII platforms. There is now not even
-a minimal performance hit in writing code portable between ASCII and EBCDIC
-platforms.
-
-=item *
-
-Win32 Perl uses 8 KB less of per-process memory than before for every perl
-process, because some data is now memory mapped from disk and shared
-between processes from the same perl binary.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-Many of the libraries distributed with perl have been upgraded since v5.20.0.
-For a complete list of changes, run:
-
- corelist --diff 5.20.0 5.22.0
-
-You can substitute your favorite version in place of 5.20.0, too.
-
-Some notable changes include:
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded to version 2.04.
-
-Tests can now be run in parallel.
-
-=item *
-
-L<attributes> has been upgraded to version 0.27.
-
-The usage of C<memEQs> in the XS has been corrected.
-L<[perl #122701]|https://rt.perl.org/Ticket/Display.html?id=122701>
-
-Avoid reading beyond the end of a buffer. [perl #122629]
-
-=item *
-
-L<B> has been upgraded to version 1.58.
-
-It provides a new C<B::safename> function, based on the existing
-C<< B::GV->SAFENAME >>, that converts C<\cOPEN> to C<^OPEN>.
-
-Nulled COPs are now of class C<B::COP>, rather than C<B::OP>.
-
-C<B::REGEXP> objects now provide a C<qr_anoncv> method for accessing the
-implicit CV associated with C<qr//> things containing code blocks, and a
-C<compflags> method that returns the pertinent flags originating from the
-C<qr//blahblah> op.
-
-C<B::PMOP> now provides a C<pmregexp> method returning a C<B::REGEXP> object.
-Two new classes, C<B::PADNAME> and C<B::PADNAMELIST>, have been introduced.
-
-A bug where, after an ithread creation or psuedofork, special/immortal SVs in
-the child ithread/psuedoprocess did not have the correct class of
-C<B::SPECIAL>, has been fixed.
-The C<id> and C<outid> PADLIST methods have been added.
-
-=item *
-
-L<B::Concise> has been upgraded to version 0.996.
-
-Null ops that are part of the execution chain are now given sequence
-numbers.
-
-Private flags for nulled ops are now dumped with mnemonics as they would be
-for the non-nulled counterparts.
-
-=item *
-
-L<B::Deparse> has been upgraded to version 1.35.
-
-It now deparses C<+sub : attr { ... }> correctly at the start of a
-statement. Without the initial C<+>, C<sub> would be a statement label.
-
-C<BEGIN> blocks are now emitted in the right place most of the time, but
-the change unfortunately introduced a regression, in that C<BEGIN> blocks
-occurring just before the end of the enclosing block may appear below it
-instead.
-
-C<B::Deparse> no longer puts erroneous C<local> here and there, such as for
-C<LIST = tr/a//d>. [perl #119815]
-
-Adjacent C<use> statements are no longer accidentally nested if one
-contains a C<do> block. [perl #115066]
-
-Parenthesised arrays in lists passed to C<\> are now correctly deparsed
-with parentheses (I<e.g.>, C<\(@a, (@b), @c)> now retains the parentheses
-around @b), thus preserving the flattening behavior of referenced
-parenthesised arrays. Formerly, it only worked for one array: C<\(@a)>.
-
-C<local our> is now deparsed correctly, with the C<our> included.
-
-C<for($foo; !$bar; $baz) {...}> was deparsed without the C<!> (or C<not>).
-This has been fixed.
-
-Core keywords that conflict with lexical subroutines are now deparsed with
-the C<CORE::> prefix.
-
-C<foreach state $x (...) {...}> now deparses correctly with C<state> and
-not C<my>.
-
-C<our @array = split(...)> now deparses correctly with C<our> in those
-cases where the assignment is optimized away.
-
-It now deparses C<our(I<LIST>)> and typed lexical (C<my Dog $spot>) correctly.
-
-Deparse C<$#_> as that instead of as C<$#{_}>.
-L<[perl #123947]|https://rt.perl.org/Ticket/Display.html?id=123947>
-
-BEGIN blocks at the end of the enclosing scope are now deparsed in the
-right place. [perl #77452]
-
-BEGIN blocks were sometimes deparsed as __ANON__, but are now always called
-BEGIN.
-
-Lexical subroutines are now fully deparsed. [perl #116553]
-
-C<Anything =~ y///r> with C</r> no longer omits the left-hand operand.
-
-The op trees that make up regexp code blocks are now deparsed for real.
-Formerly, the original string that made up the regular expression was used.
-That caused problems with C<qr/(?{E<lt>E<lt>heredoc})/> and multiline code blocks,
-which were deparsed incorrectly. [perl #123217] [perl #115256]
-
-C<$;> at the end of a statement no longer loses its semicolon.
-[perl #123357]
-
-Some cases of subroutine declarations stored in the stash in shorthand form
-were being omitted.
-
-Non-ASCII characters are now consistently escaped in strings, instead of
-some of the time. (There are still outstanding problems with regular
-expressions and identifiers that have not been fixed.)
-
-When prototype sub calls are deparsed with C<&> (I<e.g.>, under the B<-P>
-option), C<scalar> is now added where appropriate, to force the scalar
-context implied by the prototype.
-
-C<require(foo())>, C<do(foo())>, C<goto(foo())> and similar constructs with
-loop controls are now deparsed correctly. The outer parentheses are not
-optional.
-
-Whitespace is no longer escaped in regular expressions, because it was
-getting erroneously escaped within C<(?x:...)> sections.
-
-C<sub foo { foo() }> is now deparsed with those mandatory parentheses.
-
-C</@array/> is now deparsed as a regular expression, and not just
-C<@array>.
-
-C</@{-}/>, C</@{+}/> and C<$#{1}> are now deparsed with the braces, which
-are mandatory in these cases.
-
-In deparsing feature bundles, C<B::Deparse> was emitting C<no feature;> first
-instead of C<no feature ':all';>. This has been fixed.
-
-C<chdir FH> is now deparsed without quotation marks.
-
-C<\my @a> is now deparsed without parentheses. (Parenthese would flatten
-the array.)
-
-C<system> and C<exec> followed by a block are now deparsed correctly.
-Formerly there was an erroneous C<do> before the block.
-
-C<< use constant QR =E<gt> qr/.../flags >> followed by C<"" =~ QR> is no longer
-without the flags.
-
-Deparsing C<BEGIN { undef &foo }> with the B<-w> switch enabled started to
-emit 'uninitialized' warnings in Perl 5.14. This has been fixed.
-
-Deparsing calls to subs with a C<(;+)> prototype resulted in an infinite
-loop. The C<(;$>) C<(_)> and C<(;_)> prototypes were given the wrong
-precedence, causing C<foo($aE<lt>$b)> to be deparsed without the parentheses.
-
-Deparse now provides a defined state sub in inner subs.
-
-=item *
-
-L<B::Op_private> has been added.
-
-L<B::Op_private> provides detailed information about the flags used in the
-C<op_private> field of perl opcodes.
-
-=item *
-
-L<bigint>, L<bignum>, L<bigrat> have been upgraded to version 0.39.
-
-Document in CAVEATS that using strings as numbers won't always invoke
-the big number overloading, and how to invoke it. [rt.perl.org #123064]
-
-=item *
-
-L<Carp> has been upgraded to version 1.36.
-
-C<Carp::Heavy> now ignores version mismatches with Carp if Carp is newer
-than 1.12, since C<Carp::Heavy>'s guts were merged into Carp at that
-point.
-L<[perl #121574]|https://rt.perl.org/Ticket/Display.html?id=121574>
-
-Carp now handles non-ASCII platforms better.
-
-Off-by-one error fix for Perl E<lt> 5.14.
-
-=item *
-
-L<constant> has been upgraded to version 1.33.
-
-It now accepts fully-qualified constant names, allowing constants to be defined
-in packages other than the caller.
-
-=item *
-
-L<CPAN> has been upgraded to version 2.11.
-
-Add support for C<Cwd::getdcwd()> and introduce workaround for a misbehavior
-seen on Strawberry Perl 5.20.1.
-
-Fix C<chdir()> after building dependencies bug.
-
-Introduce experimental support for plugins/hooks.
-
-Integrate the C<App::Cpan> sources.
-
-Do not check recursion on optional dependencies.
-
-Sanity check F<META.yml> to contain a hash.
-L<[cpan #95271]|https://rt.cpan.org/Ticket/Display.html?id=95271>
-
-=item *
-
-L<CPAN::Meta::Requirements> has been upgraded to version 2.132.
-
-Works around limitations in C<version::vpp> detecting v-string magic and adds
-support for forthcoming L<ExtUtils::MakeMaker> bootstrap F<version.pm> for
-Perls older than 5.10.0.
-
-=item *
-
-L<Data::Dumper> has been upgraded to version 2.158.
-
-Fixes CVE-2014-4330 by adding a configuration variable/option to limit
-recursion when dumping deep data structures.
-
-Changes to resolve Coverity issues.
-XS dumps incorrectly stored the name of code references stored in a
-GLOB.
-L<[perl #122070]|https://rt.perl.org/Ticket/Display.html?id=122070>
-
-=item *
-
-L<DynaLoader> has been upgraded to version 1.32.
-
-Remove C<dl_nonlazy> global if unused in Dynaloader. [perl #122926]
-
-=item *
-
-L<Encode> has been upgraded to version 2.72.
-
-C<piconv> now has better error handling when the encoding name is nonexistent,
-and a build breakage when upgrading L<Encode> in perl-5.8.2 and earlier has
-been fixed.
-
-Building in C++ mode on Windows now works.
-
-=item *
-
-L<Errno> has been upgraded to version 1.23.
-
-Add C<-P> to the preprocessor command-line on GCC 5. GCC added extra
-line directives, breaking parsing of error code definitions. [rt.perl.org
-#123784]
-
-=item *
-
-L<experimental> has been upgraded to version 0.013.
-
-Hardcodes features for Perls older than 5.15.7.
-
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded to version 0.280221.
-
-Fixes a regression on Android.
-L<[perl #122675]|https://rt.perl.org/Ticket/Display.html?id=122675>
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded to version 1.70.
-
-Fixes a bug with C<maniread()>'s handling of quoted filenames and improves
-C<manifind()> to follow symlinks.
-L<[perl #122415]|https://rt.perl.org/Ticket/Display.html?id=122415>
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded to version 3.28.
-
-Only declare C<file> unused if we actually define it.
-Improve generated C<RETVAL> code generation to avoid repeated
-references to C<ST(0)>. [perl #123278]
-Broaden and document the C</OBJ$/> to C</REF$/> typemap optimization
-for the C<DESTROY> method. [perl #123418]
-
-=item *
-
-L<Fcntl> has been upgraded to version 1.13.
-
-Add support for the Linux pipe buffer size C<fcntl()> commands.
-
-=item *
-
-L<File::Find> has been upgraded to version 1.29.
-
-C<find()> and C<finddepth()> will now warn if passed inappropriate or
-misspelled options.
-
-=item *
-
-L<File::Glob> has been upgraded to version 1.24.
-
-Avoid C<SvIV()> expanding to call C<get_sv()> three times in a few
-places. [perl #123606]
-
-=item *
-
-L<HTTP::Tiny> has been upgraded to version 0.054.
-
-C<keep_alive> is now fork-safe and thread-safe.
-
-=item *
-
-L<IO> has been upgraded to version 1.35.
-
-The XS implementation has been fixed for the sake of older Perls.
-
-=item *
-
-L<IO::Socket> has been upgraded to version 1.38.
-
-Document the limitations of the C<connected()> method. [perl #123096]
-
-=item *
-
-L<IO::Socket::IP> has been upgraded to version 0.37.
-
-A better fix for subclassing C<connect()>.
-L<[cpan #95983]|https://rt.cpan.org/Ticket/Display.html?id=95983>
-L<[cpan #97050]|https://rt.cpan.org/Ticket/Display.html?id=97050>
-
-Implements Timeout for C<connect()>.
-L<[cpan #92075]|https://rt.cpan.org/Ticket/Display.html?id=92075>
-
-=item *
-
-The libnet collection of modules has been upgraded to version 3.05.
-
-Support for IPv6 and SSL to C<Net::FTP>, C<Net::NNTP>, C<Net::POP3> and C<Net::SMTP>.
-Improvements in C<Net::SMTP> authentication.
-
-=item *
-
-L<Locale::Codes> has been upgraded to version 3.34.
-
-Fixed a bug in the scripts used to extract data from spreadsheets that
-prevented the SHP currency code from being found.
-L<[cpan #94229]|https://rt.cpan.org/Ticket/Display.html?id=94229>
-
-New codes have been added.
-
-=item *
-
-L<Math::BigInt> has been upgraded to version 1.9997.
-
-Synchronize POD changes from the CPAN release.
-C<< Math::BigFloat->blog(x) >> would sometimes return C<blog(2*x)> when
-the accuracy was greater than 70 digits.
-The result of C<< Math::BigFloat->bdiv() >> in list context now
-satisfies C<< x = quotient * divisor + remainder >>.
-
-Correct handling of subclasses.
-L<[cpan #96254]|https://rt.cpan.org/Ticket/Display.html?id=96254>
-L<[cpan #96329]|https://rt.cpan.org/Ticket/Display.html?id=96329>
-
-=item *
-
-L<Module::Metadata> has been upgraded to version 1.000026.
-
-Support installations on older perls with an L<ExtUtils::MakeMaker> earlier
-than 6.63_03
-
-=item *
-
-L<overload> has been upgraded to version 1.26.
-
-A redundant C<ref $sub> check has been removed.
-
-=item *
-
-The PathTools module collection has been upgraded to version 3.56.
-
-A warning from the B<gcc> compiler is now avoided when building the XS.
-
-Don't turn leading C<//> into C</> on Cygwin. [perl #122635]
-
-=item *
-
-L<perl5db.pl> has been upgraded to version 1.49.
-
-The debugger would cause an assertion failure.
-L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
-
-C<fork()> in the debugger under C<tmux> will now create a new window for
-the forked process. L<[perl
-#121333]|https://rt.perl.org/Ticket/Display.html?id=121333>
-
-The debugger now saves the current working directory on startup and
-restores it when you restart your program with C<R> or C<rerun>. L<[perl
-#121509]|https://rt.perl.org/Ticket/Display.html?id=121509>
-
-=item *
-
-L<PerlIO::scalar> has been upgraded to version 0.22.
-
-Reading from a position well past the end of the scalar now correctly
-returns end of file. [perl #123443]
-
-Seeking to a negative position still fails, but no longer leaves the
-file position set to a negation location.
-
-C<eof()> on a C<PerlIO::scalar> handle now properly returns true when
-the file position is past the 2GB mark on 32-bit systems.
-
-Attempting to write at file positions impossible for the platform now
-fail early rather than wrapping at 4GB.
-
-=item *
-
-L<Pod::Perldoc> has been upgraded to version 3.25.
-
-Filehandles opened for reading or writing now have C<:encoding(UTF-8)> set.
-L<[cpan #98019]|https://rt.cpan.org/Ticket/Display.html?id=98019>
-
-=item *
-
-L<POSIX> has been upgraded to version 1.53.
-
-The C99 math functions and constants (for example C<acosh>, C<isinf>, C<isnan>, C<round>,
-C<trunc>; C<M_E>, C<M_SQRT2>, C<M_PI>) have been added.
-
-C<POSIX::tmpnam()> now produces a deprecation warning. [perl #122005]
-
-=item *
-
-L<Safe> has been upgraded to version 2.39.
-
-C<reval> was not propagating void context properly.
-
-=item *
-
-Scalar-List-Utils has been upgraded to version 1.41.
-
-A new module, L<Sub::Util>, has been added, containing functions related to
-CODE refs, including C<subname> (inspired by C<Sub::Identity>) and C<set_subname>
-(copied and renamed from C<Sub::Name>).
-The use of C<GetMagic> in C<List::Util::reduce()> has also been fixed.
-L<[cpan #63211]|https://rt.cpan.org/Ticket/Display.html?id=63211>
-
-=item *
-
-L<SDBM_File> has been upgraded to version 1.13.
-
-Simplified the build process. [perl #123413]
-
-=item *
-
-L<Time::Piece> has been upgraded to version 1.29.
-
-When pretty printing negative C<Time::Seconds>, the "minus" is no longer lost.
-
-=item *
-
-L<Unicode::Collate> has been upgraded to version 1.12.
-
-Version 0.67's improved discontiguous contractions is invalidated by default
-and is supported as a parameter C<long_contraction>.
-
-=item *
-
-L<Unicode::Normalize> has been upgraded to version 1.18.
-
-The XSUB implementation has been removed in favor of pure Perl.
-
-=item *
-
-L<Unicode::UCD> has been upgraded to version 0.61.
-
-A new function L<property_values()|Unicode::UCD/prop_values()>
-has been added to return a given property's possible values.
-
-A new function L<charprop()|Unicode::UCD/charprop()>
-has been added to return the value of a given property for a given code
-point.
-
-A new function L<charprops_all()|Unicode::UCD/charprops_all()>
-has been added to return the values of all Unicode properties for a
-given code point.
-
-A bug has been fixed so that L<propaliases()|Unicode::UCD/prop_aliases()>
-returns the correct short and long names for the Perl extensions where
-it was incorrect.
-
-A bug has been fixed so that
-L<prop_value_aliases()|Unicode::UCD/prop_value_aliases()>
-returns C<undef> instead of a wrong result for properties that are Perl
-extensions.
-
-This module now works on EBCDIC platforms.
-
-=item *
-
-L<utf8> has been upgraded to version 1.17
-
-A mismatch between the documentation and the code in C<utf8::downgrade()>
-was fixed in favor of the documentation. The optional second argument
-is now correctly treated as a perl boolean (true/false semantics) and
-not as an integer.
-
-=item *
-
-L<version> has been upgraded to version 0.9909.
-
-Numerous changes. See the F<Changes> file in the CPAN distribution for
-details.
-
-=item *
-
-L<Win32> has been upgraded to version 0.51.
-
-C<GetOSName()> now supports Windows 8.1, and building in C++ mode now works.
-
-=item *
-
-L<Win32API::File> has been upgraded to version 0.1202
-
-Building in C++ mode now works.
-
-=item *
-
-L<XSLoader> has been upgraded to version 0.20.
-
-Allow XSLoader to load modules from a different namespace.
-[perl #122455]
-
-=back
-
-=head2 Removed Modules and Pragmata
-
-The following modules (and associated modules) have been removed from the core
-perl distribution:
-
-=over 4
-
-=item *
-
-L<CGI>
-
-=item *
-
-L<Module::Build>
-
-=back
-
-=head1 Documentation
-
-=head2 New Documentation
-
-=head3 L<perlunicook>
-
-This document, by Tom Christiansen, provides examples of handling Unicode in
-Perl.
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlaix>
-
-=over 4
-
-=item *
-
-A note on long doubles has been added.
-
-=back
-
-
-=head3 L<perlapi>
-
-=over 4
-
-=item *
-
-Note that C<SvSetSV> doesn't do set magic.
-
-=item *
-
-C<sv_usepvn_flags> - fix documentation to mention the use of C<Newx> instead of
-C<malloc>.
-
-L<[perl #121869]|https://rt.perl.org/Ticket/Display.html?id=121869>
-
-=item *
-
-Clarify where C<NUL> may be embedded or is required to terminate a string.
-
-=item *
-
-Some documentation that was previously missing due to formatting errors is
-now included.
-
-=item *
-
-Entries are now organized into groups rather than by the file where they
-are found.
-
-=item *
-
-Alphabetical sorting of entries is now done consistently (automatically
-by the POD generator) to make entries easier to find when scanning.
-
-=back
-
-=head3 L<perldata>
-
-=over 4
-
-=item *
-
-The syntax of single-character variable names has been brought
-up-to-date and more fully explained.
-
-=item *
-
-Hexadecimal floating point numbers are described, as are infinity and
-NaN.
-
-=back
-
-=head3 L<perlebcdic>
-
-=over 4
-
-=item *
-
-This document has been significantly updated in the light of recent
-improvements to EBCDIC support.
-
-=back
-
-=head3 L<perlfilter>
-
-=over 4
-
-=item *
-
-Added a L<LIMITATIONS|perlfilter/LIMITATIONS> section.
-
-=back
-
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-Mention that C<study()> is currently a no-op.
-
-=item *
-
-Calling C<delete> or C<exists> on array values is now described as "strongly
-discouraged" rather than "deprecated".
-
-=item *
-
-Improve documentation of C<< our >>.
-
-=item *
-
-C<-l> now notes that it will return false if symlinks aren't supported by the
-file system.
-L<[perl #121523]|https://rt.perl.org/Ticket/Display.html?id=121523>
-
-=item *
-
-Note that C<exec LIST> and C<system LIST> may fall back to the shell on
-Win32. Only the indirect-object syntax C<exec PROGRAM LIST> and
-C<system PROGRAM LIST> will reliably avoid using the shell.
-
-This has also been noted in L<perlport>.
-
-L<[perl #122046]|https://rt.perl.org/Ticket/Display.html?id=122046>
-
-=back
-
-=head3 L<perlguts>
-
-=over 4
-
-=item *
-
-The OOK example has been updated to account for COW changes and a change in the
-storage of the offset.
-
-=item *
-
-Details on C level symbols and libperl.t added.
-
-=item *
-
-Information on Unicode handling has been added
-
-=item *
-
-Information on EBCDIC handling has been added
-
-=back
-
-=head3 L<perlhack>
-
-=over 4
-
-=item *
-
-A note has been added about running on platforms with non-ASCII
-character sets
-
-=item *
-
-A note has been added about performance testing
-
-=back
-
-=head3 L<perlhacktips>
-
-=over 4
-
-=item *
-
-Documentation has been added illustrating the perils of assuming that
-there is no change to the contents of static memory pointed to by the
-return values of Perl's wrappers for C library functions.
-
-=item *
-
-Replacements for C<tmpfile>, C<atoi>, C<strtol>, and C<strtoul> are now
-recommended.
-
-=item *
-
-Updated documentation for the C<test.valgrind> C<make> target.
-L<[perl #121431]|https://rt.perl.org/Ticket/Display.html?id=121431>
-
-=item *
-
-Information is given about writing test files portably to non-ASCII
-platforms.
-
-=item *
-
-A note has been added about how to get a C language stack backtrace.
-
-=back
-
-=head3 L<perlhpux>
-
-=over 4
-
-=item *
-
-Note that the message "Redeclaration of "sendpath" with a different
-storage class specifier" is harmless.
-
-=back
-
-=head3 L<perllocale>
-
-=over 4
-
-=item *
-
-Updated for the enhancements in v5.22, along with some clarifications.
-
-=back
-
-=head3 L<perlmodstyle>
-
-=over 4
-
-=item *
-
-Instead of pointing to the module list, we are now pointing to
-L<PrePAN|http://prepan.org/>.
-
-=back
-
-=head3 L<perlop>
-
-=over 4
-
-=item *
-
-Updated for the enhancements in v5.22, along with some clarifications.
-
-=back
-
-=head3 L<perlpodspec>
-
-=over 4
-
-=item *
-
-The specification of the pod language is changing so that the default
-encoding of pods that aren't in UTF-8 (unless otherwise indicated) is
-CP1252 instead of ISO 8859-1 (Latin1).
-
-=back
-
-=head3 L<perlpolicy>
-
-=over 4
-
-=item *
-
-We now have a code of conduct for the I<< p5p >> mailing list, as documented
-in L<< perlpolicy/STANDARDS OF CONDUCT >>.
-
-=item *
-
-The conditions for marking an experimental feature as non-experimental are now
-set out.
-
-=item *
-
-Clarification has been made as to what sorts of changes are permissible in
-maintenance releases.
-
-=back
-
-=head3 L<perlport>
-
-=over 4
-
-=item *
-
-Out-of-date VMS-specific information has been fixed and/or simplified.
-
-=item *
-
-Notes about EBCDIC have been added.
-
-=back
-
-=head3 L<perlre>
-
-=over 4
-
-=item *
-
-The description of the C</x> modifier has been clarified to note that
-comments cannot be continued onto the next line by escaping them; and
-there is now a list of all the characters that are considered whitespace
-by this modifier.
-
-=item *
-
-The new C</n> modifier is described.
-
-=item *
-
-A note has been added on how to make bracketed character class ranges
-portable to non-ASCII machines.
-
-=back
-
-=head3 L<perlrebackslash>
-
-=over 4
-
-=item *
-
-Added documentation of C<\b{sb}>, C<\b{wb}>, C<\b{gcb}>, and C<\b{g}>.
-
-=back
-
-=head3 L<perlrecharclass>
-
-=over 4
-
-=item *
-
-Clarifications have been added to L<perlrecharclass/Character Ranges>
-to the effect C<[A-Z]>, C<[a-z]>, C<[0-9]> and
-any subranges thereof in regular expression bracketed character classes
-are guaranteed to match exactly what a naive English speaker would
-expect them to match, even on platforms (such as EBCDIC) where perl
-has to do extra work to accomplish this.
-
-=item *
-
-The documentation of Bracketed Character Classes has been expanded to cover the
-improvements in C<qr/[\N{named sequence}]/> (see under L</Selected Bug Fixes>).
-
-=back
-
-=head3 L<perlref>
-
-=over 4
-
-=item *
-
-A new section has been added
-L<Assigning to References|perlref/Assigning to References>
-
-=back
-
-=head3 L<perlsec>
-
-=over 4
-
-=item *
-
-Comments added on algorithmic complexity and tied hashes.
-
-=back
-
-=head3 L<perlsyn>
-
-=over 4
-
-=item *
-
-An ambiguity in the documentation of the C<...> statement has been corrected.
-L<[perl #122661]|https://rt.perl.org/Ticket/Display.html?id=122661>
-
-=item *
-
-The empty conditional in C<< for >> and C<< while >> is now documented
-in L<< perlsyn >>.
-
-=back
-
-=head3 L<perlunicode>
-
-=over 4
-
-=item *
-
-This has had extensive revisions to bring it up-to-date with current
-Unicode support and to make it more readable. Notable is that Unicode
-7.0 changed what it should do with non-characters. Perl retains the old
-way of handling for reasons of backward compatibility. See
-L<perlunicode/Noncharacter code points>.
-
-=back
-
-=head3 L<perluniintro>
-
-=over 4
-
-=item *
-
-Advice for how to make sure your strings and regular expression patterns are
-interpreted as Unicode has been updated.
-
-=back
-
-=head3 L<perlvar>
-
-=over 4
-
-=item *
-
-C<$]> is no longer listed as being deprecated. Instead, discussion has
-been added on the advantages and disadvantages of using it versus
-C<$^V>.
-
-=item *
-
-C<${^ENCODING}> is now marked as deprecated.
-
-=item *
-
-The entry for C<%^H> has been clarified to indicate it can only handle
-simple values.
-
-=back
-
-=head3 L<perlvms>
-
-=over 4
-
-=item *
-
-Out-of-date and/or incorrect material has been removed.
-
-=item *
-
-Updated documentation on environment and shell interaction in VMS.
-
-=back
-
-=head3 L<perlxs>
-
-=over 4
-
-=item *
-
-Added a discussion of locale issues in XS code.
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Bad symbol for scalar|perldiag/"Bad symbol for scalar">
-
-(P) An internal request asked to add a scalar entry to something that
-wasn't a symbol table entry.
-
-=item *
-
-L<Can't use a hash as a reference|perldiag/"Can't use a hash as a reference">
-
-(F) You tried to use a hash as a reference, as in
-C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl E<lt>= 5.6.1
-used to allow this syntax, but shouldn't have.
-
-=item *
-
-L<Can't use an array as a reference|perldiag/"Can't use an array as a reference">
-
-(F) You tried to use an array as a reference, as in
-C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl E<lt>= 5.6.1 used to
-allow this syntax, but shouldn't have.
-
-=item *
-
-L<Can't use 'defined(@array)' (Maybe you should just omit the defined()?)|perldiag/"Can't use 'defined(@array)' (Maybe you should just omit the defined()?)">
-
-(F) C<defined()> is not useful on arrays because it
-checks for an undefined I<scalar> value. If you want to see if the
-array is empty, just use S<C<if (@array) { # not empty }>> for example.
-
-=item *
-
-L<Can't use 'defined(%hash)' (Maybe you should just omit the defined()?)|perldiag/"Can't use 'defined(%hash)' (Maybe you should just omit the defined()?)">
-
-(F) C<defined()> is not usually right on hashes.
-
-Although S<C<defined %hash>> is false on a plain not-yet-used hash, it
-becomes true in several non-obvious circumstances, including iterators,
-weak references, stash names, even remaining true after S<C<undef %hash>>.
-These things make S<C<defined %hash>> fairly useless in practice, so it now
-generates a fatal error.
-
-If a check for non-empty is what you wanted then just put it in boolean
-context (see L<perldata/Scalar values>):
-
- if (%hash) {
- # not empty
- }
-
-If you had S<C<defined %Foo::Bar::QUUX>> to check whether such a package
-variable exists then that's never really been reliable, and isn't
-a good way to enquire about the features of a package, or whether
-it's loaded, etc.
-
-=item *
-
-L<Cannot chr %f|perldiag/"Cannot chr %f">
-
-(F) You passed an invalid number (like an infinity or not-a-number) to
-C<chr>.
-
-=item *
-
-L<Cannot compress %f in pack|perldiag/"Cannot compress %f in pack">
-
-(F) You tried converting an infinity or not-a-number to an unsigned
-character, which makes no sense.
-
-=item *
-
-L<Cannot pack %f with '%c'|perldiag/"Cannot pack %f with '%c'">
-
-(F) You tried converting an infinity or not-a-number to a character,
-which makes no sense.
-
-=item *
-
-L<Cannot print %f with '%c'|perldiag/"Cannot printf %f with '%c'">
-
-(F) You tried printing an infinity or not-a-number as a character (C<%c>),
-which makes no sense. Maybe you meant C<'%s'>, or just stringifying it?
-
-=item *
-
-L<charnames alias definitions may not contain a sequence of multiple spaces|perldiag/"charnames alias definitions may not contain a sequence of multiple spaces">
-
-(F) You defined a character name which had multiple space
-characters in a row. Change them to single spaces. Usually these
-names are defined in the C<:alias> import argument to C<use charnames>, but
-they could be defined by a translator installed into C<$^H{charnames}>.
-See L<charnames/CUSTOM ALIASES>.
-
-=item *
-
-L<charnames alias definitions may not contain trailing white-space|perldiag/"charnames alias definitions may not contain trailing white-space">
-
-(F) You defined a character name which ended in a space
-character. Remove the trailing space(s). Usually these names are
-defined in the C<:alias> import argument to C<use charnames>, but they
-could be defined by a translator installed into C<$^H{charnames}>.
-See L<charnames/CUSTOM ALIASES>.
-
-=item *
-
-L<:const is not permitted on named subroutines|perldiag/":const is not permitted on named subroutines">
-
-(F) The C<const> attribute causes an anonymous subroutine to be run and
-its value captured at the time that it is cloned. Named subroutines are
-not cloned like this, so the attribute does not make sense on them.
-
-=item *
-
-L<Hexadecimal float: internal error|perldiag/"Hexadecimal float: internal error">
-
-(F) Something went horribly bad in hexadecimal float handling.
-
-=item *
-
-L<Hexadecimal float: unsupported long double format|perldiag/"Hexadecimal float: unsupported long double format">
-
-(F) You have configured Perl to use long doubles but
-the internals of the long double format are unknown,
-therefore the hexadecimal float output is impossible.
-
-=item *
-
-L<Illegal suidscript|perldiag/"Illegal suidscript">
-
-(F) The script run under suidperl was somehow illegal.
-
-=item *
-
-L<In '(?...)', the '(' and '?' must be adjacent in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"In '(?...)', the '(' and '?' must be adjacent in regex; marked by <-- HERE in m/%s/">
-
-(F) The two-character sequence C<"(?"> in
-this context in a regular expression pattern should be an
-indivisible token, with nothing intervening between the C<"(">
-and the C<"?">, but you separated them.
-
-=item *
-
-L<In '(*VERB...)', the '(' and '*' must be adjacent in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"In '(*VERB...)', the '(' and '*' must be adjacent in regex; marked by <-- HERE in m/%s/">
-
-(F) The two-character sequence C<"(*"> in
-this context in a regular expression pattern should be an
-indivisible token, with nothing intervening between the C<"(">
-and the C<"*">, but you separated them.
-
-=item *
-
-L<Invalid quantifier in {,} in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Invalid quantifier in {,} in regex; marked by <-- HERE in m/%s/">
-
-(F) The pattern looks like a {min,max} quantifier, but the min or max could not
-be parsed as a valid number: either it has leading zeroes, or it represents
-too big a number to cope with. The S<<-- HERE> shows where in the regular
-expression the problem was discovered. See L<perlre>.
-
-=item *
-
-L<'%s' is an unknown bound type in regex|perldiag/"'%s' is an unknown bound type in regex; marked by <-- HERE in m/%s/">
-
-(F) You used C<\b{...}> or C<\B{...}> and the C<...> is not known to
-Perl. The current valid ones are given in
-L<perlrebackslash/\b{}, \b, \B{}, \B>.
-
-=item *
-
-L<Missing or undefined argument to require|perldiag/Missing or undefined argument to require>
-
-(F) You tried to call C<require> with no argument or with an undefined
-value as an argument. C<require> expects either a package name or a
-file-specification as an argument. See L<perlfunc/require>.
-
-Formerly, C<require> with no argument or C<undef> warned about a Null filename.
-
-=back
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<\C is deprecated in regex|perldiag/"\C is deprecated in regex; marked by <-- HERE in m/%s/">
-
-(D deprecated) The C<< /\C/ >> character class was deprecated in v5.20, and
-now emits a warning. It is intended that it will become an error in v5.24.
-This character class matches a single byte even if it appears within a
-multi-byte character, breaks encapsulation, and can corrupt UTF-8
-strings.
-
-=item *
-
-L<"%s" is more clearly written simply as "%s" in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"%s" is more clearly written simply as "%s" in regex; marked by <-- HERE in mE<sol>%sE<sol>>
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-You specified a character that has the given plainer way of writing it,
-and which is also portable to platforms running with different character
-sets.
-
-=item *
-
-L<Argument "%s" treated as 0 in increment (++)|perldiag/"Argument "%s" treated
-as 0 in increment (++)">
-
-(W numeric) The indicated string was fed as an argument to the C<++> operator
-which expects either a number or a string matching C</^[a-zA-Z]*[0-9]*\z/>.
-See L<perlop/Auto-increment and Auto-decrement> for details.
-
-=item *
-
-L<Both or neither range ends should be Unicode in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Both or neither range ends should be Unicode in regex; marked by <-- HERE in m/%s/">
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-In a bracketed character class in a regular expression pattern, you
-had a range which has exactly one end of it specified using C<\N{}>, and
-the other end is specified using a non-portable mechanism. Perl treats
-the range as a Unicode range, that is, all the characters in it are
-considered to be the Unicode characters, and which may be different code
-points on some platforms Perl runs on. For example, C<[\N{U+06}-\x08]>
-is treated as if you had instead said C<[\N{U+06}-\N{U+08}]>, that is it
-matches the characters whose code points in Unicode are 6, 7, and 8.
-But that C<\x08> might indicate that you meant something different, so
-the warning gets raised.
-
-=item *
-
-L<Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".|perldiag/Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".>
-
-(W locale) You are 1) running under "C<use locale>"; 2) the current
-locale is not a UTF-8 one; 3) you tried to do the designated case-change
-operation on the specified Unicode character; and 4) the result of this
-operation would mix Unicode and locale rules, which likely conflict.
-
-The warnings category C<locale> is new.
-
-=item *
-
-L<:const is experimental|perldiag/":const is experimental">
-
-(S experimental::const_attr) The C<const> attribute is experimental.
-If you want to use the feature, disable the warning with C<no warnings
-'experimental::const_attr'>, but know that in doing so you are taking
-the risk that your code may break in a future Perl version.
-
-=item *
-
-L<gmtime(%f) failed|perldiag/"gmtime(%f) failed">
-
-(W overflow) You called C<gmtime> with a number that it could not handle:
-too large, too small, or NaN. The returned value is C<undef>.
-
-=item *
-
-L<Hexadecimal float: exponent overflow|perldiag/"Hexadecimal float: exponent overflow">
-
-(W overflow) The hexadecimal floating point has larger exponent
-than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: exponent underflow|perldiag/"Hexadecimal float: exponent underflow">
-
-(W overflow) The hexadecimal floating point has smaller exponent
-than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: mantissa overflow|perldiag/"Hexadecimal float: mantissa overflow">
-
-(W overflow) The hexadecimal floating point literal had more bits in
-the mantissa (the part between the C<0x> and the exponent, also known as
-the fraction or the significand) than the floating point supports.
-
-=item *
-
-L<Hexadecimal float: precision loss|perldiag/"Hexadecimal float: precision loss">
-
-(W overflow) The hexadecimal floating point had internally more
-digits than could be output. This can be caused by unsupported
-long double formats, or by 64-bit integers not being available
-(needed to retrieve the digits under some configurations).
-
-=item *
-
-L<Locale '%s' may not work well.%s|perldiag/Locale '%s' may not work well.%s>
-
-(W locale) You are using the named locale, which is a non-UTF-8 one, and
-which perl has determined is not fully compatible with what it can
-handle. The second C<%s> gives a reason.
-
-The warnings category C<locale> is new.
-
-=item *
-
-L<localtime(%f) failed|perldiag/"localtime(%f) failed">
-
-(W overflow) You called C<localtime> with a number that it could not handle:
-too large, too small, or NaN. The returned value is C<undef>.
-
-=item *
-
-L<Negative repeat count does nothing|perldiag/"Negative repeat count does nothing">
-
-(W numeric) You tried to execute the
-L<C<x>|perlop/Multiplicative Operators> repetition operator fewer than 0
-times, which doesn't make sense.
-
-=item *
-
-L<NO-BREAK SPACE in a charnames alias definition is deprecated|perldiag/"NO-BREAK SPACE in a charnames alias definition is deprecated">
-
-(D deprecated) You defined a character name which contained a no-break
-space character. Change it to a regular space. Usually these names are
-defined in the C<:alias> import argument to C<use charnames>, but they
-could be defined by a translator installed into C<$^H{charnames}>. See
-L<charnames/CUSTOM ALIASES>.
-
-=item *
-
-L<Non-finite repeat count does nothing|perldiag/"Non-finite repeat count does nothing">
-
-(W numeric) You tried to execute the
-L<C<x>|perlop/Multiplicative Operators> repetition operator C<Inf> (or
-C<-Inf>) or NaN times, which doesn't make sense.
-
-=item *
-
-L<PerlIO layer ':win32' is experimental|perldiag/"PerlIO layer ':win32' is experimental">
-
-(S experimental::win32_perlio) The C<:win32> PerlIO layer is
-experimental. If you want to take the risk of using this layer,
-simply disable this warning:
-
- no warnings "experimental::win32_perlio";
-
-=item *
-
-L<Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by <-- HERE in mE<sol>%sE<sol>">
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-Stricter rules help to find typos and other errors. Perhaps you didn't
-even intend a range here, if the C<"-"> was meant to be some other
-character, or should have been escaped (like C<"\-">). If you did
-intend a range, the one that was used is not portable between ASCII and
-EBCDIC platforms, and doesn't have an obvious meaning to a casual
-reader.
-
- [3-7] # OK; Obvious and portable
- [d-g] # OK; Obvious and portable
- [A-Y] # OK; Obvious and portable
- [A-z] # WRONG; Not portable; not clear what is meant
- [a-Z] # WRONG; Not portable; not clear what is meant
- [%-.] # WRONG; Not portable; not clear what is meant
- [\x41-Z] # WRONG; Not portable; not obvious to non-geek
-
-(You can force portability by specifying a Unicode range, which means that
-the endpoints are specified by
-L<C<\N{...}>|perlrecharclass/Character Ranges>, but the meaning may
-still not be obvious.)
-The stricter rules require that ranges that start or stop with an ASCII
-character that is not a control have all their endpoints be a literal
-character, and not some escape sequence (like C<"\x41">), and the ranges
-must be all digits, or all uppercase letters, or all lowercase letters.
-
-=item *
-
-L<Ranges of digits should be from the same group in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of digits should be from the same group in regex; marked by <-- HERE in m/%s/">
-
-(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>)
-
-Stricter rules help to find typos and other errors. You included a
-range, and at least one of the end points is a decimal digit. Under the
-stricter rules, when this happens, both end points should be digits in
-the same group of 10 consecutive digits.
-
-=item *
-
-L<Redundant argument in %s|perldiag/Redundant argument in %s>
-
-(W redundant) You called a function with more arguments than were
-needed, as indicated by information within other arguments you supplied
-(I<e.g>. a printf format). Currently only emitted when a printf-type format
-required fewer arguments than were supplied, but might be used in the
-future for I<e.g.> L<perlfunc/pack>.
-
-The warnings category C<< redundant >> is new. See also
-L<[perl #121025]|https://rt.perl.org/Ticket/Display.html?id=121025>.
-
-=item *
-
-L<Replacement list is longer than search list|perldiag/Replacement list is longer than search list>
-
-This is not a new diagnostic, but in earlier releases was accidentally
-not displayed if the transliteration contained wide characters. This is
-now fixed, so that you may see this diagnostic in places where you
-previously didn't (but should have).
-
-=item *
-
-L<Use of \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale|perldiag/"Use of \b{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale">
-
-(W locale) You are matching a regular expression using locale rules,
-and a Unicode boundary is being matched, but the locale is not a Unicode
-one. This doesn't make sense. Perl will continue, assuming a Unicode
-(UTF-8) locale, but the results could well be wrong except if the locale
-happens to be ISO-8859-1 (Latin1) where this message is spurious and can
-be ignored.
-
-The warnings category C<locale> is new.
-
-=item *
-
-L<< Using E<sol>u for '%s' instead of E<sol>%s in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Using E<sol>u for '%s' instead of E<sol>%s in regex; marked by <-- HERE in mE<sol>%sE<sol>" >>
-
-(W regexp) You used a Unicode boundary (C<\b{...}> or C<\B{...}>) in a
-portion of a regular expression where the character set modifiers C</a>
-or C</aa> are in effect. These two modifiers indicate an ASCII
-interpretation, and this doesn't make sense for a Unicode definition.
-The generated regular expression will compile so that the boundary uses
-all of Unicode. No other portion of the regular expression is affected.
-
-=item *
-
-L<The bitwise feature is experimental|perldiag/"The bitwise feature is experimental">
-
-(S experimental::bitwise) This warning is emitted if you use bitwise
-operators (C<& | ^ ~ &. |. ^. ~.>) with the "bitwise" feature enabled.
-Simply suppress the warning if you want to use the feature, but know
-that in doing so you are taking the risk of using an experimental
-feature which may change or be removed in a future Perl version:
-
- no warnings "experimental::bitwise";
- use feature "bitwise";
- $x |.= $y;
-
-=item *
-
-L<Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/%s/">
-
-(D deprecated, regexp) You used a literal C<"{"> character in a regular
-expression pattern. You should change to use C<"\{"> instead, because a future
-version of Perl (tentatively v5.26) will consider this to be a syntax error. If
-the pattern delimiters are also braces, any matching right brace
-(C<"}">) should also be escaped to avoid confusing the parser, for
-example,
-
- qr{abc\{def\}ghi}
-
-=item *
-
-L<Use of literal non-graphic characters in variable names is deprecated|perldiag/"Use of literal non-graphic characters in variable names is deprecated">
-
-(D deprecated) Using literal non-graphic (including control)
-characters in the source to refer to the I<^FOO> variables, like C<$^X> and
-C<${^GLOBAL_PHASE}> is now deprecated.
-
-=item *
-
-L<Useless use of attribute "const"|perldiag/Useless use of attribute "const">
-
-(W misc) The C<const> attribute has no effect except
-on anonymous closure prototypes. You applied it to
-a subroutine via L<attributes.pm|attributes>. This is only useful
-inside an attribute handler for an anonymous subroutine.
-
-=item *
-
-L<Useless use of E<sol>d modifier in transliteration operator|perldiag/"Useless use of /d modifier in transliteration operator">
-
-This is not a new diagnostic, but in earlier releases was accidentally
-not displayed if the transliteration contained wide characters. This is
-now fixed, so that you may see this diagnostic in places where you
-previously didn't (but should have).
-
-=item *
-
-L<E<quot>use re 'strict'E<quot> is experimental|perldiag/"use re 'strict'" is experimental>
-
-(S experimental::re_strict) The things that are different when a regular
-expression pattern is compiled under C<'strict'> are subject to change
-in future Perl releases in incompatible ways; there are also proposals
-to change how to enable strict checking instead of using this subpragma.
-This means that a pattern that compiles today may not in a future Perl
-release. This warning is to alert you to that risk.
-
-=item *
-
-L<Warning: unable to close filehandle properly: %s|perldiag/"Warning: unable to close filehandle properly: %s">
-
-L<Warning: unable to close filehandle %s properly: %s|perldiag/"Warning: unable to close filehandle %s properly: %s">
-
-(S io) Previously, perl silently ignored any errors when doing an implicit
-close of a filehandle, I<i.e.> where the reference count of the filehandle
-reached zero and the user's code hadn't already called C<close()>; I<e.g.>
-
- {
- open my $fh, '>', $file or die "open: '$file': $!\n";
- print $fh, $data or die;
- } # implicit close here
-
-In a situation such as disk full, due to buffering, the error may only be
-detected during the final close, so not checking the result of the close is
-dangerous.
-
-So perl now warns in such situations.
-
-=item *
-
-L<Wide character (U+%X) in %s|perldiag/"Wide character (U+%X) in %s">
-
-(W locale) While in a single-byte locale (I<i.e.>, a non-UTF-8
-one), a multi-byte character was encountered. Perl considers this
-character to be the specified Unicode code point. Combining non-UTF-8
-locales and Unicode is dangerous. Almost certainly some characters
-will have two different representations. For example, in the ISO 8859-7
-(Greek) locale, the code point 0xC3 represents a Capital Gamma. But so
-also does 0x393. This will make string comparisons unreliable.
-
-You likely need to figure out how this multi-byte character got mixed up
-with your single-byte locale (or perhaps you thought you had a UTF-8
-locale, but Perl disagrees).
-
-The warnings category C<locale> is new.
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-<> should be quotes
-
-This warning has been changed to
-L<< <> at require-statement should be quotes|perldiag/"<> at require-statement should be quotes" >>
-to make the issue more identifiable.
-
-=item *
-
-L<Argument "%s" isn't numeric%s|perldiag/"Argument "%s" isn't numeric%s">
-
-The L<perldiag> entry for this warning has added this clarifying note:
-
- Note that for the Inf and NaN (infinity and not-a-number) the
- definition of "numeric" is somewhat unusual: the strings themselves
- (like "Inf") are considered numeric, and anything following them is
- considered non-numeric.
-
-=item *
-
-L<Global symbol "%s" requires explicit package name|perldiag/"Global symbol "%s" requires explicit package name (did you forget to declare "my %s"?)">
-
-This message has had '(did you forget to declare "my %s"?)' appended to it, to
-make it more helpful to new Perl programmers.
-L<[perl #121638]|https://rt.perl.org/Ticket/Display.html?id=121638>
-
-=item *
-
-'"my" variable &foo::bar can't be in a package' has been reworded to say
-'subroutine' instead of 'variable'.
-
-=item *
-
-L<<< \N{} in character class restricted to one character in regex; marked by
-S<< <-- HERE >> in mE<sol>%sE<sol>|perldiag/"\N{} in inverted character
-class or as a range end-point is restricted to one character in regex;
-marked by <-- HERE in m/%s/" >>>
-
-This message has had I<character class> changed to I<inverted character
-class or as a range end-point is> to reflect improvements in
-C<qr/[\N{named sequence}]/> (see under L</Selected Bug Fixes>).
-
-=item *
-
-L<panic: frexp|perldiag/"panic: frexp: %f">
-
-This message has had ': C<%f>' appended to it, to show what the offending
-floating point number is.
-
-=item *
-
-I<Possible precedence problem on bitwise %c operator> reworded as
-L<Possible precedence problem on bitwise %s operator|perldiag/"Possible precedence problem on bitwise %s operator">.
-
-=item *
-
-L<Unsuccessful %s on filename containing newline|perldiag/"Unsuccessful %s on filename containing newline">
-
-This warning is now only produced when the newline is at the end of
-the filename.
-
-=item *
-
-"Variable C<%s> will not stay shared" has been changed to say "Subroutine"
-when it is actually a lexical sub that will not stay shared.
-
-=item *
-
-L<Variable length lookbehind not implemented in regex mE<sol>%sE<sol>|perldiag/"Variable length lookbehind not implemented in regex m/%s/">
-
-The L<perldiag> entry for this warning has had information about Unicode
-behavior added.
-
-=back
-
-=head2 Diagnostic Removals
-
-=over
-
-=item *
-
-"Ambiguous use of -foo resolved as -&foo()"
-
-There is actually no ambiguity here, and this impedes the use of negated
-constants; I<e.g.>, C<-Inf>.
-
-=item *
-
-"Constant is not a FOO reference"
-
-Compile-time checking of constant dereferencing (I<e.g.>, C<< my_constant->() >>)
-has been removed, since it was not taking overloading into account.
-L<[perl #69456]|https://rt.perl.org/Ticket/Display.html?id=69456>
-L<[perl #122607]|https://rt.perl.org/Ticket/Display.html?id=122607>
-
-=back
-
-=head1 Utility Changes
-
-=head2 F<find2perl>, F<s2p> and F<a2p> removal
-
-=over 4
-
-=item *
-
-The F<x2p/> directory has been removed from the Perl core.
-
-This removes find2perl, s2p and a2p. They have all been released to CPAN as
-separate distributions (C<App::find2perl>, C<App::s2p>, C<App::a2p>).
-
-=back
-
-=head2 L<h2ph>
-
-=over 4
-
-=item *
-
-F<h2ph> now handles hexadecimal constants in the compiler's predefined
-macro definitions, as visible in C<$Config{cppsymbols}>.
-L<[perl #123784]|https://rt.perl.org/Ticket/Display.html?id=123784>.
-
-=back
-
-=head2 L<encguess>
-
-=over 4
-
-=item *
-
-No longer depends on non-core modules.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-F<Configure> now checks for C<lrintl()>, C<lroundl()>, C<llrintl()>, and
-C<llroundl()>.
-
-=item *
-
-F<Configure> with C<-Dmksymlinks> should now be faster.
-L<[perl #122002]|https://rt.perl.org/Ticket/Display.html?id=122002>.
-
-=item *
-
-The C<pthreads> and C<cl> libraries will be linked by default if present.
-This allows XS modules that require threading to work on non-threaded
-perls. Note that you must still pass C<-Dusethreads> if you want a
-threaded perl.
-
-=item *
-
-For long doubles (to get more precision and range for floating point numbers)
-one can now use the GCC quadmath library which implements the quadruple
-precision floating point numbers on x86 and IA-64 platforms. See
-F<INSTALL> for details.
-
-=item *
-
-MurmurHash64A and MurmurHash64B can now be configured as the internal hash
-function.
-
-=item *
-
-C<make test.valgrind> now supports parallel testing.
-
-For example:
-
- TEST_JOBS=9 make test.valgrind
-
-See L<perlhacktips/valgrind> for more information.
-
-L<[perl #121431]|https://rt.perl.org/Ticket/Display.html?id=121431>
-
-=item *
-
-The MAD (Misc Attribute Decoration) build option has been removed
-
-This was an unmaintained attempt at preserving
-the Perl parse tree more faithfully so that automatic conversion of
-Perl 5 to Perl 6 would have been easier.
-
-This build-time configuration option had been unmaintained for years,
-and had probably seriously diverged on both Perl 5 and Perl 6 sides.
-
-=item *
-
-A new compilation flag, C<< -DPERL_OP_PARENT >> is available. For details,
-see the discussion below at L<< /Internal Changes >>.
-
-=item *
-
-Pathtools no longer tries to load XS on miniperl. This speeds up building perl
-slightly.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-F<t/porting/re_context.t> has been added to test that L<utf8> and its
-dependencies only use the subset of the C<$1..$n> capture vars that
-C<Perl_save_re_context()> is hard-coded to localize, because that function
-has no efficient way of determining at runtime what vars to localize.
-
-=item *
-
-Tests for performance issues have been added in the file F<t/perf/taint.t>.
-
-=item *
-
-Some regular expression tests are written in such a way that they will
-run very slowly if certain optimizations break. These tests have been
-moved into new files, F<< t/re/speed.t >> and F<< t/re/speed_thr.t >>,
-and are run with a C<< watchdog() >>.
-
-=item *
-
-C<< test.pl >> now allows C<< plan skip_all => $reason >>, to make it
-more compatible with C<< Test::More >>.
-
-=item *
-
-A new test script, F<op/infnan.t>, has been added to test if infinity and NaN are
-working correctly. See L</Infinity and NaN (not-a-number) handling improved>.
-
-=back
-
-=head1 Platform Support
-
-=head2 Regained Platforms
-
-=over 4
-
-=item IRIX and Tru64 platforms are working again.
-
-Some C<make test> failures remain:
-L<[perl #123977]|https://rt.perl.org/Ticket/Display.html?id=123977>
-and L<[perl #125298]|https://rt.perl.org/Ticket/Display.html?id=125298>
-for IRIX; L<[perl #124212]|https://rt.perl.org/Ticket/Display.html?id=124212>,
-L<[cpan #99605]|https://rt.cpan.org/Public/Bug/Display.html?id=99605>, and
-L<[cpan #104836|https://rt.cpan.org/Ticket/Display.html?id=104836> for Tru64.
-
-=item z/OS running EBCDIC Code Page 1047
-
-Core perl now works on this EBCDIC platform. Earlier perls also worked, but,
-even though support wasn't officially withdrawn, recent perls would not compile
-and run well. Perl 5.20 would work, but had many bugs which have now been
-fixed. Many CPAN modules that ship with Perl still fail tests, including
-C<Pod::Simple>. However the version of C<Pod::Simple> currently on CPAN should work;
-it was fixed too late to include in Perl 5.22. Work is under way to fix many
-of the still-broken CPAN modules, which likely will be installed on CPAN when
-completed, so that you may not have to wait until Perl 5.24 to get a working
-version.
-
-=back
-
-=head2 Discontinued Platforms
-
-=over 4
-
-=item NeXTSTEP/OPENSTEP
-
-NeXTSTEP was a proprietary operating system bundled with NeXT's
-workstations in the early to mid 90s; OPENSTEP was an API specification
-that provided a NeXTSTEP-like environment on a non-NeXTSTEP system. Both
-are now long dead, so support for building Perl on them has been removed.
-
-=back
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item EBCDIC
-
-Special handling is required of the perl interpreter on EBCDIC platforms
-to get C<qr/[i-j]/> to match only C<"i"> and C<"j">, since there are 7
-characters between the
-code points for C<"i"> and C<"j">. This special handling had only been
-invoked when both ends of the range are literals. Now it is also
-invoked if any of the C<\N{...}> forms for specifying a character by
-name or Unicode code point is used instead of a literal. See
-L<perlrecharclass/Character Ranges>.
-
-=item HP-UX
-
-The archname now distinguishes use64bitint from use64bitall.
-
-=item Android
-
-Build support has been improved for cross-compiling in general and for
-Android in particular.
-
-=item VMS
-
-=over 4
-
-=item *
-
-When spawning a subprocess without waiting, the return value is now
-the correct PID.
-
-=item *
-
-Fix a prototype so linking doesn't fail under the VMS C++ compiler.
-
-=item *
-
-C<finite>, C<finitel>, and C<isfinite> detection has been added to
-C<configure.com>, environment handling has had some minor changes, and
-a fix for legacy feature checking status.
-
-=back
-
-=item Win32
-
-=over 4
-
-=item *
-
-F<miniperl.exe> is now built with C<-fno-strict-aliasing>, allowing 64-bit
-builds to complete on GCC 4.8.
-L<[perl #123976]|https://rt.perl.org/Ticket/Display.html?id=123976>
-
-=item *
-
-C<nmake minitest> now works on Win32. Due to dependency issues you
-need to build C<nmake test-prep> first, and a small number of the
-tests fail.
-L<[perl #123394]|https://rt.perl.org/Ticket/Display.html?id=123394>
-
-=item *
-
-Perl can now be built in C++ mode on Windows by setting the makefile macro
-C<USE_CPLUSPLUS> to the value "define".
-
-=item *
-
-The list form of piped open has been implemented for Win32. Note: unlike
-C<system LIST> this does not fall back to the shell.
-L<[perl #121159]|https://rt.perl.org/Ticket/Display.html?id=121159>
-
-=item *
-
-New C<DebugSymbols> and C<DebugFull> configuration options added to
-Windows makefiles.
-
-=item *
-
-Previously, compiling XS modules (including CPAN ones) using Visual C++ for
-Win64 resulted in around a dozen warnings per file from F<hv_func.h>. These
-warnings have been silenced.
-
-=item *
-
-Support for building without PerlIO has been removed from the Windows
-makefiles. Non-PerlIO builds were all but deprecated in Perl 5.18.0 and are
-already not supported by F<Configure> on POSIX systems.
-
-=item *
-
-Between 2 and 6 milliseconds and seven I/O calls have been saved per attempt
-to open a perl module for each path in C<@INC>.
-
-=item *
-
-Intel C builds are now always built with C99 mode on.
-
-=item *
-
-C<%I64d> is now being used instead of C<%lld> for MinGW.
-
-=item *
-
-In the experimental C<:win32> layer, a crash in C<open> was fixed. Also
-opening F</dev/null> (which works under Win32 Perl's default C<:unix>
-layer) was implemented for C<:win32>.
-L<[perl #122224]|https://rt.perl.org/Ticket/Display.html?id=122224>
-
-=item *
-
-A new makefile option, C<USE_LONG_DOUBLE>, has been added to the Windows
-dmake makefile for gcc builds only. Set this to "define" if you want perl to
-use long doubles to give more accuracy and range for floating point numbers.
-
-=back
-
-=item OpenBSD
-
-On OpenBSD, Perl will now default to using the system C<malloc> due to the
-security features it provides. Perl's own malloc wrapper has been in use
-since v5.14 due to performance reasons, but the OpenBSD project believes
-the tradeoff is worth it and would prefer that users who need the speed
-specifically ask for it.
-
-L<[perl #122000]|https://rt.perl.org/Ticket/Display.html?id=122000>.
-
-=item Solaris
-
-=over 4
-
-=item *
-
-We now look for the Sun Studio compiler in both F</opt/solstudio*> and
-F</opt/solarisstudio*>.
-
-=item *
-
-Builds on Solaris 10 with C<-Dusedtrace> would fail early since make
-didn't follow implied dependencies to build C<perldtrace.h>. Added an
-explicit dependency to C<depend>.
-L<[perl #120120]|https://rt.perl.org/Ticket/Display.html?id=120120>
-
-=item *
-
-C99 options have been cleaned up; hints look for C<solstudio>
-as well as C<SUNWspro>; and support for native C<setenv> has been added.
-
-=back
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Experimental support has been added to allow ops in the optree to locate
-their parent, if any. This is enabled by the non-default build option
-C<-DPERL_OP_PARENT>. It is envisaged that this will eventually become
-enabled by default, so XS code which directly accesses the C<op_sibling>
-field of ops should be updated to be future-proofed.
-
-On C<PERL_OP_PARENT> builds, the C<op_sibling> field has been renamed
-C<op_sibparent> and a new flag, C<op_moresib>, added. On the last op in a
-sibling chain, C<op_moresib> is false and C<op_sibparent> points to the
-parent (if any) rather than being C<NULL>.
-
-To make existing code work transparently whether using C<PERL_OP_PARENT>
-or not, a number of new macros and functions have been added that should
-be used, rather than directly manipulating C<op_sibling>.
-
-For the case of just reading C<op_sibling> to determine the next sibling,
-two new macros have been added. A simple scan through a sibling chain
-like this:
-
- for (; kid->op_sibling; kid = kid->op_sibling) { ... }
-
-should now be written as:
-
- for (; OpHAS_SIBLING(kid); kid = OpSIBLING(kid)) { ... }
-
-For altering optrees, a general-purpose function C<op_sibling_splice()>
-has been added, which allows for manipulation of a chain of sibling ops.
-By analogy with the Perl function C<splice()>, it allows you to cut out
-zero or more ops from a sibling chain and replace them with zero or more
-new ops. It transparently handles all the updating of sibling, parent,
-op_last pointers etc.
-
-If you need to manipulate ops at a lower level, then three new macros,
-C<OpMORESIB_set>, C<OpLASTSIB_set> and C<OpMAYBESIB_set> are intended to
-be a low-level portable way to set C<op_sibling> / C<op_sibparent> while
-also updating C<op_moresib>. The first sets the sibling pointer to a new
-sibling, the second makes the op the last sibling, and the third
-conditionally does the first or second action. Note that unlike
-C<op_sibling_splice()> these macros won't maintain consistency in the
-parent at the same time (I<e.g.> by updating C<op_first> and C<op_last> where
-appropriate).
-
-A C-level C<Perl_op_parent()> function and a Perl-level C<B::OP::parent()>
-method have been added. The C function only exists under
-C<PERL_OP_PARENT> builds (using it is build-time error on vanilla
-perls). C<B::OP::parent()> exists always, but on a vanilla build it
-always returns C<NULL>. Under C<PERL_OP_PARENT>, they return the parent
-of the current op, if any. The variable C<$B::OP::does_parent> allows you
-to determine whether C<B> supports retrieving an op's parent.
-
-C<PERL_OP_PARENT> was introduced in 5.21.2, but the interface was
-changed considerably in 5.21.11. If you updated your code before the
-5.21.11 changes, it may require further revision. The main changes after
-5.21.2 were:
-
-=over 4
-
-=item *
-
-The C<OP_SIBLING> and C<OP_HAS_SIBLING> macros have been renamed
-C<OpSIBLING> and C<OpHAS_SIBLING> for consistency with other
-op-manipulating macros.
-
-=item *
-
-The C<op_lastsib> field has been renamed C<op_moresib>, and its meaning
-inverted.
-
-=item *
-
-The macro C<OpSIBLING_set> has been removed, and has been superseded by
-C<OpMORESIB_set> I<et al>.
-
-=item *
-
-The C<op_sibling_splice()> function now accepts a null C<parent> argument
-where the splicing doesn't affect the first or last ops in the sibling
-chain
-
-=back
-
-=item *
-
-Macros have been created to allow XS code to better manipulate the POSIX locale
-category C<LC_NUMERIC>. See L<perlapi/Locale-related functions and macros>.
-
-=item *
-
-The previous C<atoi> I<et al> replacement function, C<grok_atou>, has now been
-superseded by C<grok_atoUV>. See L<perlclib> for details.
-
-=item *
-
-A new function, C<Perl_sv_get_backrefs()>, has been added which allows you
-retrieve the weak references, if any, which point at an SV.
-
-=item *
-
-The C<screaminstr()> function has been removed. Although marked as
-public API, it was undocumented and had no usage in CPAN modules. Calling
-it has been fatal since 5.17.0.
-
-=item *
-
-The C<newDEFSVOP()>, C<block_start()>, C<block_end()> and C<intro_my()>
-functions have been added to the API.
-
-=item *
-
-The internal C<convert> function in F<op.c> has been renamed
-C<op_convert_list> and added to the API.
-
-=item *
-
-The C<sv_magic()> function no longer forbids "ext" magic on read-only
-values. After all, perl can't know whether the custom magic will modify
-the SV or not.
-L<[perl #123103]|https://rt.perl.org/Ticket/Display.html?id=123103>.
-
-=item *
-
-Accessing L<perlapi/CvPADLIST> on an XSUB is now forbidden.
-
-The C<CvPADLIST> field has been reused for a different internal purpose
-for XSUBs. So in particular, you can no longer rely on it being NULL as a
-test of whether a CV is an XSUB. Use C<CvISXSUB()> instead.
-
-=item *
-
-SVs of type C<SVt_NV> are now sometimes bodiless when the build
-configuration and platform allow it: specifically, when C<< sizeof(NV) <=
-sizeof(IV) >>. "Bodiless" means that the NV value is stored directly in
-the head of an SV, without requiring a separate body to be allocated. This
-trick has already been used for IVs since 5.9.2 (though in the case of
-IVs, it is always used, regardless of platform and build configuration).
-
-=item *
-
-The C<$DB::single>, C<$DB::signal> and C<$DB::trace> variables now have set- and
-get-magic that stores their values as IVs, and those IVs are used when
-testing their values in C<pp_dbstate()>. This prevents perl from
-recursing infinitely if an overloaded object is assigned to any of those
-variables.
-L<[perl #122445]|https://rt.perl.org/Ticket/Display.html?id=122445>.
-
-=item *
-
-C<Perl_tmps_grow()>, which is marked as public API but is undocumented, has
-been removed from the public API. This change does not affect XS code that
-uses the C<EXTEND_MORTAL> macro to pre-extend the mortal stack.
-
-=item *
-
-Perl's internals no longer sets or uses the C<SVs_PADMY> flag.
-C<SvPADMY()> now returns a true value for anything not marked C<PADTMP>
-and C<SVs_PADMY> is now defined as 0.
-
-=item *
-
-The macros C<SETsv> and C<SETsvUN> have been removed. They were no longer used
-in the core since commit 6f1401dc2a five years ago, and have not been
-found present on CPAN.
-
-=item *
-
-The C<< SvFAKE >> bit (unused on HVs) got informally reserved by
-David Mitchell for future work on vtables.
-
-=item *
-
-The C<sv_catpvn_flags()> function accepts C<SV_CATBYTES> and C<SV_CATUTF8>
-flags, which specify whether the appended string is bytes or UTF-8,
-respectively. (These flags have in fact been present since 5.16.0, but
-were formerly not regarded as part of the API.)
-
-=item *
-
-A new opcode class, C<< METHOP >>, has been introduced. It holds
-information used at runtime to improve the performance
-of class/object method calls.
-
-C<< OP_METHOD >> and C<< OP_METHOD_NAMED >> have changed from being
-C<< UNOP/SVOP >> to being C<< METHOP >>.
-
-=item *
-
-C<cv_name()> is a new API function that can be passed a CV or GV. It
-returns an SV containing the name of the subroutine, for use in
-diagnostics.
-
-L<[perl #116735]|https://rt.perl.org/Ticket/Display.html?id=116735>
-L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
-
-=item *
-
-C<cv_set_call_checker_flags()> is a new API function that works like
-C<cv_set_call_checker()>, except that it allows the caller to specify
-whether the call checker requires a full GV for reporting the subroutine's
-name, or whether it could be passed a CV instead. Whatever value is
-passed will be acceptable to C<cv_name()>. C<cv_set_call_checker()>
-guarantees there will be a GV, but it may have to create one on the fly,
-which is inefficient.
-L<[perl #116735]|https://rt.perl.org/Ticket/Display.html?id=116735>
-
-=item *
-
-C<CvGV> (which is not part of the API) is now a more complex macro, which may
-call a function and reify a GV. For those cases where it has been used as a
-boolean, C<CvHASGV> has been added, which will return true for CVs that
-notionally have GVs, but without reifying the GV. C<CvGV> also returns a GV
-now for lexical subs.
-L<[perl #120441]|https://rt.perl.org/Ticket/Display.html?id=120441>
-
-=item *
-
-The L<perlapi/sync_locale> function has been added to the public API.
-Changing the program's locale should be avoided by XS code. Nevertheless,
-certain non-Perl libraries called from XS need to do so, such as C<Gtk>.
-When this happens, Perl needs to be told that the locale has
-changed. Use this function to do so, before returning to Perl.
-
-=item *
-
-The defines and labels for the flags in the C<op_private> field of OPs are now
-auto-generated from data in F<regen/op_private>. The noticeable effect of this
-is that some of the flag output of C<Concise> might differ slightly, and the
-flag output of S<C<perl -Dx>> may differ considerably (they both use the same set
-of labels now). Also, debugging builds now have a new assertion in
-C<op_free()> to ensure that the op doesn't have any unrecognized flags set in
-C<op_private>.
-
-=item *
-
-The deprecated variable C<PL_sv_objcount> has been removed.
-
-=item *
-
-Perl now tries to keep the locale category C<LC_NUMERIC> set to "C"
-except around operations that need it to be set to the program's
-underlying locale. This protects the many XS modules that cannot cope
-with the decimal radix character not being a dot. Prior to this
-release, Perl initialized this category to "C", but a call to
-C<POSIX::setlocale()> would change it. Now such a call will change the
-underlying locale of the C<LC_NUMERIC> category for the program, but the
-locale exposed to XS code will remain "C". There are new macros
-to manipulate the LC_NUMERIC locale, including
-C<STORE_LC_NUMERIC_SET_TO_NEEDED> and
-C<STORE_LC_NUMERIC_FORCE_TO_UNDERLYING>.
-See L<perlapi/Locale-related functions and macros>.
-
-=item *
-
-A new macro L<C<isUTF8_CHAR>|perlapi/isUTF8_CHAR> has been written which
-efficiently determines if the string given by its parameters begins
-with a well-formed UTF-8 encoded character.
-
-=item *
-
-The following private API functions had their context parameter removed:
-C<Perl_cast_ulong>, C<Perl_cast_i32>, C<Perl_cast_iv>, C<Perl_cast_uv>,
-C<Perl_cv_const_sv>, C<Perl_mg_find>, C<Perl_mg_findext>, C<Perl_mg_magical>,
-C<Perl_mini_mktime>, C<Perl_my_dirfd>, C<Perl_sv_backoff>, C<Perl_utf8_hop>.
-
-Note that the prefix-less versions of those functions that are part of the
-public API, such as C<cast_i32()>, remain unaffected.
-
-=item *
-
-The C<PADNAME> and C<PADNAMELIST> types are now separate types, and no
-longer simply aliases for SV and AV.
-L<[perl #123223]|https://rt.perl.org/Ticket/Display.html?id=123223>.
-
-=item *
-
-Pad names are now always UTF-8. The C<PadnameUTF8> macro always returns
-true. Previously, this was effectively the case already, but any support
-for two different internal representations of pad names has now been
-removed.
-
-=item *
-
-A new op class, C<UNOP_AUX>, has been added. This is a subclass of
-C<UNOP> with an C<op_aux> field added, which points to an array of unions
-of UV, SV* etc. It is intended for where an op needs to store more data
-than a simple C<op_sv> or whatever. Currently the only op of this type is
-C<OP_MULTIDEREF> (see next item).
-
-=item *
-
-A new op has been added, C<OP_MULTIDEREF>, which performs one or more
-nested array and hash lookups where the key is a constant or simple
-variable. For example the expression C<$a[0]{$k}[$i]>, which previously
-involved ten C<rv2Xv>, C<Xelem>, C<gvsv> and C<const> ops is now performed
-by a single C<multideref> op. It can also handle C<local>, C<exists> and
-C<delete>. A non-simple index expression, such as C<[$i+1]> is still done
-using C<aelem>/C<helem>, and single-level array lookup with a small constant
-index is still done using C<aelemfast>.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-C<close> now sets C<$!>
-
-When an I/O error occurs, the fact that there has been an error is recorded
-in the handle. C<close> returns false for such a handle. Previously, the
-value of C<$!> would be untouched by C<close>, so the common convention of
-writing S<C<close $fh or die $!>> did not work reliably. Now the handle
-records the value of C<$!>, too, and C<close> restores it.
-
-=item *
-
-C<no re> now can turn off everything that C<use re> enables
-
-Previously, running C<no re> would turn off only a few things. Now it
-can turn off all the enabled things. For example, the only way to
-stop debugging, once enabled, was to exit the enclosing block; that is
-now fixed.
-
-=item *
-
-C<pack("D", $x)> and C<pack("F", $x)> now zero the padding on x86 long
-double builds. Under some build options on GCC 4.8 and later, they used
-to either overwrite the zero-initialized padding, or bypass the
-initialized buffer entirely. This caused F<op/pack.t> to fail.
-L<[perl #123971]|https://rt.perl.org/Ticket/Display.html?id=123971>
-
-=item *
-
-Extending an array cloned from a parent thread could result in "Modification of
-a read-only value attempted" errors when attempting to modify the new elements.
-L<[perl #124127]|https://rt.perl.org/Ticket/Display.html?id=124127>
-
-=item *
-
-An assertion failure and subsequent crash with C<< *x=<y> >> has been fixed.
-L<[perl #123790]|https://rt.perl.org/Ticket/Display.html?id=123790>
-
-=item *
-
-A possible crashing/looping bug related to compiling lexical subs has been
-fixed.
-L<[perl #124099]|https://rt.perl.org/Ticket/Display.html?id=124099>
-
-=item *
-
-UTF-8 now works correctly in function names, in unquoted HERE-document
-terminators, and in variable names used as array indexes.
-L<[perl #124113]|https://rt.perl.org/Ticket/Display.html?id=124113>
-
-=item *
-
-Repeated global pattern matches in scalar context on large tainted strings were
-exponentially slow depending on the current match position in the string.
-L<[perl #123202]|https://rt.perl.org/Ticket/Display.html?id=123202>
-
-=item *
-
-Various crashes due to the parser getting confused by syntax errors have been
-fixed.
-L<[perl #123801]|https://rt.perl.org/Ticket/Display.html?id=123801>
-L<[perl #123802]|https://rt.perl.org/Ticket/Display.html?id=123802>
-L<[perl #123955]|https://rt.perl.org/Ticket/Display.html?id=123955>
-L<[perl #123995]|https://rt.perl.org/Ticket/Display.html?id=123995>
-
-=item *
-
-C<split> in the scope of lexical C<$_> has been fixed not to fail assertions.
-L<[perl #123763]|https://rt.perl.org/Ticket/Display.html?id=123763>
-
-=item *
-
-C<my $x : attr> syntax inside various list operators no longer fails
-assertions.
-L<[perl #123817]|https://rt.perl.org/Ticket/Display.html?id=123817>
-
-=item *
-
-An C<@> sign in quotes followed by a non-ASCII digit (which is not a valid
-identifier) would cause the parser to crash, instead of simply trying the
-C<@> as literal. This has been fixed.
-L<[perl #123963]|https://rt.perl.org/Ticket/Display.html?id=123963>
-
-=item *
-
-C<*bar::=*foo::=*glob_with_hash> has been crashing since Perl 5.14, but no
-longer does.
-L<[perl #123847]|https://rt.perl.org/Ticket/Display.html?id=123847>
-
-=item *
-
-C<foreach> in scalar context was not pushing an item on to the stack, resulting
-in bugs. (S<C<print 4, scalar do { foreach(@x){} } + 1>> would print 5.)
-It has been fixed to return C<undef>.
-L<[perl #124004]|https://rt.perl.org/Ticket/Display.html?id=124004>
-
-=item *
-
-Several cases of data used to store environment variable contents in core C
-code being potentially overwritten before being used have been fixed.
-L<[perl #123748]|https://rt.perl.org/Ticket/Display.html?id=123748>
-
-=item *
-
-Some patterns starting with C</.*..../> matched against long strings have
-been slow since v5.8, and some of the form C</.*..../i> have been slow
-since v5.18. They are now all fast again.
-L<[perl #123743]|https://rt.perl.org/Ticket/Display.html?id=123743>.
-
-=item *
-
-The original visible value of C<$/> is now preserved when it is set to
-an invalid value. Previously if you set C<$/> to a reference to an
-array, for example, perl would produce a runtime error and not set
-C<PL_rs>, but Perl code that checked C<$/> would see the array
-reference.
-L<[perl #123218]|https://rt.perl.org/Ticket/Display.html?id=123218>.
-
-=item *
-
-In a regular expression pattern, a POSIX class, like C<[:ascii:]>, must
-be inside a bracketed character class, like C<qr/[[:ascii:]]/>. A
-warning is issued when something looking like a POSIX class is not
-inside a bracketed class. That warning wasn't getting generated when
-the POSIX class was negated: C<[:^ascii:]>. This is now fixed.
-
-=item *
-
-Perl 5.14.0 introduced a bug whereby S<C<eval { LABEL: }>> would crash. This
-has been fixed.
-L<[perl #123652]|https://rt.perl.org/Ticket/Display.html?id=123652>.
-
-=item *
-
-Various crashes due to the parser getting confused by syntax errors have
-been fixed.
-L<[perl #123617]|https://rt.perl.org/Ticket/Display.html?id=123617>.
-L<[perl #123737]|https://rt.perl.org/Ticket/Display.html?id=123737>.
-L<[perl #123753]|https://rt.perl.org/Ticket/Display.html?id=123753>.
-L<[perl #123677]|https://rt.perl.org/Ticket/Display.html?id=123677>.
-
-=item *
-
-Code like C</$a[/> used to read the next line of input and treat it as
-though it came immediately after the opening bracket. Some invalid code
-consequently would parse and run, but some code caused crashes, so this is
-now disallowed.
-L<[perl #123712]|https://rt.perl.org/Ticket/Display.html?id=123712>.
-
-=item *
-
-Fix argument underflow for C<pack>.
-L<[perl #123874]|https://rt.perl.org/Ticket/Display.html?id=123874>.
-
-=item *
-
-Fix handling of non-strict C<\x{}>. Now C<\x{}> is equivalent to C<\x{0}>
-instead of faulting.
-
-=item *
-
-C<stat -t> is now no longer treated as stackable, just like C<-t stat>.
-L<[perl #123816]|https://rt.perl.org/Ticket/Display.html?id=123816>.
-
-=item *
-
-The following no longer causes a SEGV: C<qr{x+(y(?0))*}>.
-
-=item *
-
-Fixed infinite loop in parsing backrefs in regexp patterns.
-
-=item *
-
-Several minor bug fixes in behavior of Infinity and NaN, including
-warnings when stringifying Infinity-like or NaN-like strings. For example,
-"NaNcy" doesn't numify to NaN anymore.
-
-=item *
-
-A bug in regular expression patterns that could lead to segfaults and
-other crashes has been fixed. This occurred only in patterns compiled
-with C</i> while taking into account the current POSIX locale (which usually
-means they have to be compiled within the scope of C<S<use locale>>),
-and there must be a string of at least 128 consecutive bytes to match.
-L<[perl #123539]|https://rt.perl.org/Ticket/Display.html?id=123539>.
-
-=item *
-
-C<s///g> now works on very long strings (where there are more than 2
-billion iterations) instead of dying with 'Substitution loop'.
-L<[perl #103260]|https://rt.perl.org/Ticket/Display.html?id=103260>.
-L<[perl #123071]|https://rt.perl.org/Ticket/Display.html?id=123071>.
-
-=item *
-
-C<gmtime> no longer crashes with not-a-number values.
-L<[perl #123495]|https://rt.perl.org/Ticket/Display.html?id=123495>.
-
-=item *
-
-C<\()> (a reference to an empty list), and C<y///> with lexical C<$_> in
-scope, could both do a bad write past the end of the stack. They have
-both been fixed to extend the stack first.
-
-=item *
-
-C<prototype()> with no arguments used to read the previous item on the
-stack, so S<C<print "foo", prototype()>> would print foo's prototype.
-It has been fixed to infer C<$_> instead.
-L<[perl #123514]|https://rt.perl.org/Ticket/Display.html?id=123514>.
-
-=item *
-
-Some cases of lexical state subs declared inside predeclared subs could
-crash, for example when evalling a string including the name of an outer
-variable, but no longer do.
-
-=item *
-
-Some cases of nested lexical state subs inside anonymous subs could cause
-'Bizarre copy' errors or possibly even crashes.
-
-=item *
-
-When trying to emit warnings, perl's default debugger (F<perl5db.pl>) was
-sometimes giving 'Undefined subroutine &DB::db_warn called' instead. This
-bug, which started to occur in Perl 5.18, has been fixed.
-L<[perl #123553]|https://rt.perl.org/Ticket/Display.html?id=123553>.
-
-=item *
-
-Certain syntax errors in substitutions, such as C<< s/${<>{})// >>, would
-crash, and had done so since Perl 5.10. (In some cases the crash did not
-start happening till 5.16.) The crash has, of course, been fixed.
-L<[perl #123542]|https://rt.perl.org/Ticket/Display.html?id=123542>.
-
-=item *
-
-Fix a couple of string grow size calculation overflows; in particular,
-a repeat expression like S<C<33 x ~3>> could cause a large buffer
-overflow since the new output buffer size was not correctly handled by
-C<SvGROW()>. An expression like this now properly produces a memory wrap
-panic.
-L<[perl #123554]|https://rt.perl.org/Ticket/Display.html?id=123554>.
-
-=item *
-
-C<< formline("@...", "a"); >> would crash. The C<FF_CHECKNL> case in
-C<pp_formline()> didn't set the pointer used to mark the chop position,
-which led to the C<FF_MORE> case crashing with a segmentation fault.
-This has been fixed.
-L<[perl #123538]|https://rt.perl.org/Ticket/Display.html?id=123538>.
-
-=item *
-
-A possible buffer overrun and crash when parsing a literal pattern during
-regular expression compilation has been fixed.
-L<[perl #123604]|https://rt.perl.org/Ticket/Display.html?id=123604>.
-
-=item *
-
-C<fchmod()> and C<futimes()> now set C<$!> when they fail due to being
-passed a closed file handle.
-L<[perl #122703]|https://rt.perl.org/Ticket/Display.html?id=122703>.
-
-=item *
-
-C<op_free()> and C<scalarvoid()> no longer crash due to a stack overflow
-when freeing a deeply recursive op tree.
-L<[perl #108276]|https://rt.perl.org/Ticket/Display.html?id=108276>.
-
-=item *
-
-In Perl 5.20.0, C<$^N> accidentally had the internal UTF-8 flag turned off
-if accessed from a code block within a regular expression, effectively
-UTF-8-encoding the value. This has been fixed.
-L<[perl #123135]|https://rt.perl.org/Ticket/Display.html?id=123135>.
-
-=item *
-
-A failed C<semctl> call no longer overwrites existing items on the stack,
-which means that C<(semctl(-1,0,0,0))[0]> no longer gives an
-"uninitialized" warning.
-
-=item *
-
-C<else{foo()}> with no space before C<foo> is now better at assigning the
-right line number to that statement.
-L<[perl #122695]|https://rt.perl.org/Ticket/Display.html?id=122695>.
-
-=item *
-
-Sometimes the assignment in C<@array = split> gets optimised so that C<split>
-itself writes directly to the array. This caused a bug, preventing this
-assignment from being used in lvalue context. So
-C<(@a=split//,"foo")=bar()> was an error. (This bug probably goes back to
-Perl 3, when the optimisation was added.) It has now been fixed.
-L<[perl #123057]|https://rt.perl.org/Ticket/Display.html?id=123057>.
-
-=item *
-
-When an argument list fails the checks specified by a subroutine
-signature (which is still an experimental feature), the resulting error
-messages now give the file and line number of the caller, not of the
-called subroutine.
-L<[perl #121374]|https://rt.perl.org/Ticket/Display.html?id=121374>.
-
-=item *
-
-The flip-flop operators (C<..> and C<...> in scalar context) used to maintain
-a separate state for each recursion level (the number of times the
-enclosing sub was called recursively), contrary to the documentation. Now
-each closure has one internal state for each flip-flop.
-L<[perl #122829]|https://rt.perl.org/Ticket/Display.html?id=122829>.
-
-=item *
-
-The flip-flop operator (C<..> in scalar context) would return the same
-scalar each time, unless the containing subroutine was called recursively.
-Now it always returns a new scalar.
-L<[perl #122829]|https://rt.perl.org/Ticket/Display.html?id=122829>.
-
-=item *
-
-C<use>, C<no>, statement labels, special blocks (C<BEGIN>) and pod are now
-permitted as the first thing in a C<map> or C<grep> block, the block after
-C<print> or C<say> (or other functions) returning a handle, and within
-C<${...}>, C<@{...}>, etc.
-L<[perl #122782]|https://rt.perl.org/Ticket/Display.html?id=122782>.
-
-=item *
-
-The repetition operator C<x> now propagates lvalue context to its left-hand
-argument when used in contexts like C<foreach>. That allows
-S<C<for(($#that_array)x2) { ... }>> to work as expected if the loop modifies
-C<$_>.
-
-=item *
-
-C<(...) x ...> in scalar context used to corrupt the stack if one operand
-was an object with "x" overloading, causing erratic behavior.
-L<[perl #121827]|https://rt.perl.org/Ticket/Display.html?id=121827>.
-
-=item *
-
-Assignment to a lexical scalar is often optimised away; for example in
-C<my $x; $x = $y + $z>, the assign operator is optimised away and the add
-operator writes its result directly to C<$x>. Various bugs related to
-this optimisation have been fixed. Certain operators on the right-hand
-side would sometimes fail to assign the value at all or assign the wrong
-value, or would call STORE twice or not at all on tied variables. The
-operators affected were C<$foo++>, C<$foo-->, and C<-$foo> under C<use
-integer>, C<chomp>, C<chr> and C<setpgrp>.
-
-=item *
-
-List assignments were sometimes buggy if the same scalar ended up on both
-sides of the assignment due to use of C<tied>, C<values> or C<each>. The
-result would be the wrong value getting assigned.
-
-=item *
-
-C<setpgrp($nonzero)> (with one argument) was accidentally changed in 5.16
-to mean C<setpgrp(0)>. This has been fixed.
-
-=item *
-
-C<__SUB__> could return the wrong value or even corrupt memory under the
-debugger (the C<-d> switch) and in subs containing C<eval $string>.
-
-=item *
-
-When S<C<sub () { $var }>> becomes inlinable, it now returns a different
-scalar each time, just as a non-inlinable sub would, though Perl still
-optimises the copy away in cases where it would make no observable
-difference.
-
-=item *
-
-S<C<my sub f () { $var }>> and S<C<sub () : attr { $var }>> are no longer
-eligible for inlining. The former would crash; the latter would just
-throw the attributes away. An exception is made for the little-known
-C<:method> attribute, which does nothing much.
-
-=item *
-
-Inlining of subs with an empty prototype is now more consistent than
-before. Previously, a sub with multiple statements, of which all but the last
-were optimised away, would be inlinable only if it were an anonymous sub
-containing a string C<eval> or C<state> declaration or closing over an
-outer lexical variable (or any anonymous sub under the debugger). Now any
-sub that gets folded to a single constant after statements have been
-optimised away is eligible for inlining. This applies to things like C<sub
-() { jabber() if DEBUG; 42 }>.
-
-Some subroutines with an explicit C<return> were being made inlinable,
-contrary to the documentation, Now C<return> always prevents inlining.
-
-=item *
-
-On some systems, such as VMS, C<crypt> can return a non-ASCII string. If a
-scalar assigned to had contained a UTF-8 string previously, then C<crypt>
-would not turn off the UTF-8 flag, thus corrupting the return value. This
-would happen with S<C<$lexical = crypt ...>>.
-
-=item *
-
-C<crypt> no longer calls C<FETCH> twice on a tied first argument.
-
-=item *
-
-An unterminated here-doc on the last line of a quote-like operator
-(C<qq[${ <<END }]>, C</(?{ <<END })/>) no longer causes a double free. It
-started doing so in 5.18.
-
-=item *
-
-C<index()> and C<rindex()> no longer crash when used on strings over 2GB in
-size.
-L<[perl #121562]|https://rt.perl.org/Ticket/Display.html?id=121562>.
-
-=item *
-
-A small, previously intentional, memory leak in
-C<PERL_SYS_INIT>/C<PERL_SYS_INIT3> on Win32 builds was fixed. This might
-affect embedders who repeatedly create and destroy perl engines within
-the same process.
-
-=item *
-
-C<POSIX::localeconv()> now returns the data for the program's underlying
-locale even when called from outside the scope of S<C<use locale>>.
-
-=item *
-
-C<POSIX::localeconv()> now works properly on platforms which don't have
-C<LC_NUMERIC> and/or C<LC_MONETARY>, or for which Perl has been compiled
-to disregard either or both of these locale categories. In such
-circumstances, there are now no entries for the corresponding values in
-the hash returned by C<localeconv()>.
-
-=item *
-
-C<POSIX::localeconv()> now marks appropriately the values it returns as
-UTF-8 or not. Previously they were always returned as bytes, even if
-they were supposed to be encoded as UTF-8.
-
-=item *
-
-On Microsoft Windows, within the scope of C<S<use locale>>, the following
-POSIX character classes gave results for many locales that did not
-conform to the POSIX standard:
-C<[[:alnum:]]>,
-C<[[:alpha:]]>,
-C<[[:blank:]]>,
-C<[[:digit:]]>,
-C<[[:graph:]]>,
-C<[[:lower:]]>,
-C<[[:print:]]>,
-C<[[:punct:]]>,
-C<[[:upper:]]>,
-C<[[:word:]]>,
-and
-C<[[:xdigit:]]>.
-This was because the underlying Microsoft implementation does not
-follow the standard. Perl now takes special precautions to correct for
-this.
-
-=item *
-
-Many issues have been detected by L<Coverity|http://www.coverity.com/> and
-fixed.
-
-=item *
-
-C<system()> and friends should now work properly on more Android builds.
-
-Due to an oversight, the value specified through C<-Dtargetsh> to F<Configure>
-would end up being ignored by some of the build process. This caused perls
-cross-compiled for Android to end up with defective versions of C<system()>,
-C<exec()> and backticks: the commands would end up looking for C</bin/sh>
-instead of C</system/bin/sh>, and so would fail for the vast majority
-of devices, leaving C<$!> as C<ENOENT>.
-
-=item *
-
-C<qr(...\(...\)...)>,
-C<qr[...\[...\]...]>,
-and
-C<qr{...\{...\}...}>
-now work. Previously it was impossible to escape these three
-left-characters with a backslash within a regular expression pattern
-where otherwise they would be considered metacharacters, and the pattern
-opening delimiter was the character, and the closing delimiter was its
-mirror character.
-
-=item *
-
-C<< s///e >> on tainted UTF-8 strings corrupted C<< pos() >>. This bug,
-introduced in 5.20, is now fixed.
-L<[perl #122148]|https://rt.perl.org/Ticket/Display.html?id=122148>.
-
-=item *
-
-A non-word boundary in a regular expression (C<< \B >>) did not always
-match the end of the string; in particular C<< q{} =~ /\B/ >> did not
-match. This bug, introduced in perl 5.14, is now fixed.
-L<[perl #122090]|https://rt.perl.org/Ticket/Display.html?id=122090>.
-
-=item *
-
-C<< " P" =~ /(?=.*P)P/ >> should match, but did not. This is now fixed.
-L<[perl #122171]|https://rt.perl.org/Ticket/Display.html?id=122171>.
-
-=item *
-
-Failing to compile C<use Foo> in an C<eval> could leave a spurious
-C<BEGIN> subroutine definition, which would produce a "Subroutine
-BEGIN redefined" warning on the next use of C<use>, or other C<BEGIN>
-block.
-L<[perl #122107]|https://rt.perl.org/Ticket/Display.html?id=122107>.
-
-=item *
-
-C<method { BLOCK } ARGS> syntax now correctly parses the arguments if they
-begin with an opening brace.
-L<[perl #46947]|https://rt.perl.org/Ticket/Display.html?id=46947>.
-
-=item *
-
-External libraries and Perl may have different ideas of what the locale is.
-This is problematic when parsing version strings if the locale's numeric
-separator has been changed. Version parsing has been patched to ensure
-it handles the locales correctly.
-L<[perl #121930]|https://rt.perl.org/Ticket/Display.html?id=121930>.
-
-=item *
-
-A bug has been fixed where zero-length assertions and code blocks inside of a
-regex could cause C<pos> to see an incorrect value.
-L<[perl #122460]|https://rt.perl.org/Ticket/Display.html?id=122460>.
-
-=item *
-
-Dereferencing of constants now works correctly for typeglob constants. Previously
-the glob was stringified and its name looked up. Now the glob itself is used.
-L<[perl #69456]|https://rt.perl.org/Ticket/Display.html?id=69456>
-
-=item *
-
-When parsing a sigil (C<$> C<@> C<%> C<&)> followed by braces,
-the parser no
-longer tries to guess whether it is a block or a hash constructor (causing a
-syntax error when it guesses the latter), since it can only be a block.
-
-=item *
-
-S<C<undef $reference>> now frees the referent immediately, instead of hanging on
-to it until the next statement.
-L<[perl #122556]|https://rt.perl.org/Ticket/Display.html?id=122556>
-
-=item *
-
-Various cases where the name of a sub is used (autoload, overloading, error
-messages) used to crash for lexical subs, but have been fixed.
-
-=item *
-
-Bareword lookup now tries to avoid vivifying packages if it turns out the
-bareword is not going to be a subroutine name.
-
-=item *
-
-Compilation of anonymous constants (I<e.g.>, C<sub () { 3 }>) no longer deletes
-any subroutine named C<__ANON__> in the current package. Not only was
-C<*__ANON__{CODE}> cleared, but there was a memory leak, too. This bug goes
-back to Perl 5.8.0.
-
-=item *
-
-Stub declarations like C<sub f;> and C<sub f ();> no longer wipe out constants
-of the same name declared by C<use constant>. This bug was introduced in Perl
-5.10.0.
-
-=item *
-
-C<qr/[\N{named sequence}]/> now works properly in many instances.
-
-Some names
-known to C<\N{...}> refer to a sequence of multiple characters, instead of the
-usual single character. Bracketed character classes generally only match
-single characters, but now special handling has been added so that they can
-match named sequences, but not if the class is inverted or the sequence is
-specified as the beginning or end of a range. In these cases, the only
-behavior change from before is a slight rewording of the fatal error message
-given when this class is part of a C<?[...])> construct. When the C<[...]>
-stands alone, the same non-fatal warning as before is raised, and only the
-first character in the sequence is used, again just as before.
-
-=item *
-
-Tainted constants evaluated at compile time no longer cause unrelated
-statements to become tainted.
-L<[perl #122669]|https://rt.perl.org/Ticket/Display.html?id=122669>
-
-=item *
-
-S<C<open $$fh, ...>>, which vivifies a handle with a name like
-C<"main::_GEN_0">, was not giving the handle the right reference count, so
-a double free could happen.
-
-=item *
-
-When deciding that a bareword was a method name, the parser would get confused
-if an C<our> sub with the same name existed, and look up the method in the
-package of the C<our> sub, instead of the package of the invocant.
-
-=item *
-
-The parser no longer gets confused by C<\U=> within a double-quoted string. It
-used to produce a syntax error, but now compiles it correctly.
-L<[perl #80368]|https://rt.perl.org/Ticket/Display.html?id=80368>
-
-=item *
-
-It has always been the intention for the C<-B> and C<-T> file test operators to
-treat UTF-8 encoded files as text. (L<perlfunc|perlfunc/-X FILEHANDLE> has
-been updated to say this.) Previously, it was possible for some files to be
-considered UTF-8 that actually weren't valid UTF-8. This is now fixed. The
-operators now work on EBCDIC platforms as well.
-
-=item *
-
-Under some conditions warning messages raised during regular expression pattern
-compilation were being output more than once. This has now been fixed.
-
-=item *
-
-Perl 5.20.0 introduced a regression in which a UTF-8 encoded regular
-expression pattern that contains a single ASCII lowercase letter did not
-match its uppercase counterpart. That has been fixed in both 5.20.1 and
-5.22.0.
-L<[perl #122655]|https://rt.perl.org/Ticket/Display.html?id=122655>
-
-=item *
-
-Constant folding could incorrectly suppress warnings if lexical warnings
-(C<use warnings> or C<no warnings>) were not in effect and C<$^W> were
-false at compile time and true at run time.
-
-=item *
-
-Loading Unicode tables during a regular expression match could cause assertion
-failures under debugging builds if the previous match used the very same
-regular expression.
-L<[perl #122747]|https://rt.perl.org/Ticket/Display.html?id=122747>
-
-=item *
-
-Thread cloning used to work incorrectly for lexical subs, possibly causing
-crashes or double frees on exit.
-
-=item *
-
-Since Perl 5.14.0, deleting C<$SomePackage::{__ANON__}> and then undefining an
-anonymous subroutine could corrupt things internally, resulting in
-L<Devel::Peek> crashing or L<B.pm|B> giving nonsensical data. This has been
-fixed.
-
-=item *
-
-S<C<(caller $n)[3]>> now reports names of lexical subs, instead of
-treating them as C<"(unknown)">.
-
-=item *
-
-C<sort subname LIST> now supports using a lexical sub as the comparison
-routine.
-
-=item *
-
-Aliasing (I<e.g.>, via S<C<*x = *y>>) could confuse list assignments that mention the
-two names for the same variable on either side, causing wrong values to be
-assigned.
-L<[perl #15667]|https://rt.perl.org/Ticket/Display.html?id=15667>
-
-=item *
-
-Long here-doc terminators could cause a bad read on short lines of input. This
-has been fixed. It is doubtful that any crash could have occurred. This bug
-goes back to when here-docs were introduced in Perl 3.000 twenty-five years
-ago.
-
-=item *
-
-An optimization in C<split> to treat S<C<split /^/>> like S<C<split /^/m>> had the
-unfortunate side-effect of also treating S<C<split /\A/>> like S<C<split /^/m>>,
-which it should not. This has been fixed. (Note, however, that S<C<split /^x/>>
-does not behave like S<C<split /^x/m>>, which is also considered to be a bug and
-will be fixed in a future version.)
-L<[perl #122761]|https://rt.perl.org/Ticket/Display.html?id=122761>
-
-=item *
-
-The little-known S<C<my Class $var>> syntax (see L<fields> and L<attributes>)
-could get confused in the scope of C<use utf8> if C<Class> were a constant
-whose value contained Latin-1 characters.
-
-=item *
-
-Locking and unlocking values via L<Hash::Util> or C<Internals::SvREADONLY>
-no longer has any effect on values that were read-only to begin with.
-Previously, unlocking such values could result in crashes, hangs or
-other erratic behavior.
-
-=item *
-
-Some unterminated C<(?(...)...)> constructs in regular expressions would
-either crash or give erroneous error messages. C</(?(1)/> is one such
-example.
-
-=item *
-
-S<C<pack "w", $tied>> no longer calls FETCH twice.
-
-=item *
-
-List assignments like S<C<($x, $z) = (1, $y)>> now work correctly if C<$x> and
-C<$y> have been aliased by C<foreach>.
-
-=item *
-
-Some patterns including code blocks with syntax errors, such as
-S<C</ (?{(^{})/>>, would hang or fail assertions on debugging builds. Now
-they produce errors.
-
-=item *
-
-An assertion failure when parsing C<sort> with debugging enabled has been
-fixed.
-L<[perl #122771]|https://rt.perl.org/Ticket/Display.html?id=122771>.
-
-=item *
-
-S<C<*a = *b; @a = split //, $b[1]>> could do a bad read and produce junk
-results.
+=head1 Incompatible Changes
-=item *
+There are no changes intentionally incompatible with 5.20.0 other than the
+following single exception, which we deemed to be a sensible change to make in
+order to get the new C<\b{wb}> and (in particular) C<\b{sb}> features sane
+before people decided they're worthless because of bugs in their Perl 5.22.0
+implementation and avoided them in the future.
+If any others exist, they are bugs, and we request that you submit a report.
+See L</Reporting Bugs> below.
-In S<C<() = @array = split>>, the S<C<() =>> at the beginning no longer confuses
-the optimizer into assuming a limit of 1.
+=head2 Bounds Checking Constructs
-=item *
+Several bugs, including a segmentation fault, have been fixed with the bounds
+checking constructs (introduced in Perl 5.22) C<\b{gcb}>, C<\b{sb}>, C<\b{wb}>,
+C<\B{gcb}>, C<\B{sb}>, and C<\B{wb}>. All the C<\B{}> ones now match an empty
+string; none of the C<\b{}> ones do.
+L<[perl #126319]|https://rt.perl.org/Ticket/Display.html?id=126319>
-Fatal warnings no longer prevent the output of syntax errors.
-L<[perl #122966]|https://rt.perl.org/Ticket/Display.html?id=122966>.
+=head1 Modules and Pragmata
-=item *
+=head2 Updated Modules and Pragmata
-Fixed a NaN double-to-long-double conversion error on VMS. For quiet NaNs
-(and only on Itanium, not Alpha) negative infinity instead of NaN was
-produced.
+=over 4
=item *
-Fixed the issue that caused C<< make distclean >> to incorrectly leave some
-files behind.
-L<[perl #122820]|https://rt.perl.org/Ticket/Display.html?id=122820>.
+L<Module::CoreList> has been upgraded from version 5.20150520 to 5.20151213.
=item *
-AIX now sets the length in C<< getsockopt >> correctly.
-L<[perl #120835]|https://rt.perl.org/Ticket/Display.html?id=120835>.
-L<[cpan #91183]|https://rt.cpan.org/Ticket/Display.html?id=91183>.
-L<[cpan #85570]|https://rt.cpan.org/Ticket/Display.html?id=85570>.
+L<PerlIO::scalar> has been upgraded from version 0.22 to 0.23.
=item *
-The optimization phase of a regexp compilation could run "forever" and
-exhaust all memory under certain circumstances; now fixed.
-L<[perl #122283]|https://rt.perl.org/Ticket/Display.html?id=122283>.
-
-=item *
+L<POSIX> has been upgraded from version 1.53 to 1.53_01.
-The test script F<< t/op/crypt.t >> now uses the SHA-256 algorithm if the
-default one is disabled, rather than giving failures.
-L<[perl #121591]|https://rt.perl.org/Ticket/Display.html?id=121591>.
+If C<POSIX::strerror> was passed C<$!> as its argument then it accidentally
+cleared C<$!>. This has been fixed.
+L<[perl #126229]|https://rt.perl.org/Ticket/Display.html?id=126229>
=item *
-Fixed an off-by-one error when setting the size of a shared array.
-L<[perl #122950]|https://rt.perl.org/Ticket/Display.html?id=122950>.
+L<Storable> has been upgraded from version 2.53 to 2.53_01.
=item *
-Fixed a bug that could cause perl to enter an infinite loop during
-compilation. In particular, a C<while(1)> within a sublist, I<e.g.>
-
- sub foo { () = ($a, my $b, ($c, do { while(1) {} })) }
+L<warnings> has been upgraded from version 1.32 to 1.34.
-The bug was introduced in 5.20.0
-L<[perl #122995]|https://rt.perl.org/Ticket/Display.html?id=122995>.
+The C<warnings::enabled> example now actually uses C<warnings::enabled>.
+L<[perl #126051]|https://rt.perl.org/Ticket/Display.html?id=126051>
=item *
-On Win32, if a variable was C<local>-ized in a pseudo-process that later
-forked, restoring the original value in the child pseudo-process caused
-memory corruption and a crash in the child pseudo-process (and therefore the
-OS process).
-L<[perl #40565]|https://rt.perl.org/Ticket/Display.html?id=40565>.
+L<Win32> has been upgraded from version 0.51 to 0.52.
-=item *
+This has been updated for Windows 8.1, 10 and 2012 R2 Server.
-Calling C<write> on a format with a C<^**> field could produce a panic
-in C<sv_chop()> if there were insufficient arguments or if the variable
-used to fill the field was empty.
-L<[perl #123245]|https://rt.perl.org/Ticket/Display.html?id=123245>.
+=back
-=item *
+=head1 Documentation
-Non-ASCII lexical sub names now appear without trailing junk when they
-appear in error messages.
+=head2 Changes to Existing Documentation
-=item *
+=head3 L<perltie>
-The C<\@> subroutine prototype no longer flattens parenthesized arrays
-(taking a reference to each element), but takes a reference to the array
-itself.
-L<[perl #47363]|https://rt.perl.org/Ticket/Display.html?id=47363>.
+=over 4
=item *
-A block containing nothing except a C-style C<for> loop could corrupt the
-stack, causing lists outside the block to lose elements or have elements
-overwritten. This could happen with C<map { for(...){...} } ...> and with
-lists containing C<do { for(...){...} }>.
-L<[perl #123286]|https://rt.perl.org/Ticket/Display.html?id=123286>.
-
-=item *
+The usage of C<FIRSTKEY> and C<NEXTKEY> has been clarified.
-C<scalar()> now propagates lvalue context, so that
-S<C<for(scalar($#foo)) { ... }>> can modify C<$#foo> through C<$_>.
+=back
-=item *
+=head3 L<perlvar>
-C<qr/@array(?{block})/> no longer dies with "Bizarre copy of ARRAY".
-L<[perl #123344]|https://rt.perl.org/Ticket/Display.html?id=123344>.
+=over 4
=item *
-S<C<eval '$variable'>> in nested named subroutines would sometimes look up a
-global variable even with a lexical variable in scope.
-
-=item *
+The specific true value of C<$!{E...}> is now documented, noting that it is
+subject to change and not guaranteed.
-In perl 5.20.0, C<sort CORE::fake> where 'fake' is anything other than a
-keyword, started chopping off the last 6 characters and treating the result
-as a sort sub name. The previous behavior of treating C<CORE::fake> as a
-sort sub name has been restored.
-L<[perl #123410]|https://rt.perl.org/Ticket/Display.html?id=123410>.
+=back
-=item *
+=head1 Diagnostics
-Outside of C<use utf8>, a single-character Latin-1 lexical variable is
-disallowed. The error message for it, "Can't use global C<$foo>...", was
-giving garbage instead of the variable name.
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages. For the complete list of
+diagnostic messages, see L<perldiag>.
-=item *
+=head2 Changes to Existing Diagnostics
-C<readline> on a nonexistent handle was causing C<${^LAST_FH}> to produce a
-reference to an undefined scalar (or fail an assertion). Now
-C<${^LAST_FH}> ends up undefined.
+=over 4
=item *
-C<(...) x ...> in void context now applies scalar context to the left-hand
-argument, instead of the context the current sub was called in.
-L<[perl #123020]|https://rt.perl.org/Ticket/Display.html?id=123020>.
+The C<printf> and C<sprintf> builtins are now more careful about the warnings
+they emit: argument reordering now disables the "redundant argument" warning in
+all cases.
+L<[perl #125469]|https://rt.perl.org/Ticket/Display.html?id=125469>
=back
-=head1 Known Problems
+=head1 Configuration and Compilation
=over 4
=item *
-C<pack>-ing a NaN on a perl compiled with Visual C 6 does not behave properly,
-leading to a test failure in F<t/op/infnan.t>.
-L<[perl 125203]|https://rt.perl.org/Ticket/Display.html?id=125203>
+Using the C<NO_HASH_SEED> define in combination with the default hash algorithm
+C<PERL_HASH_FUNC_ONE_AT_A_TIME_HARD> resulted in a fatal error while compiling
+the interpreter, since Perl 5.17.10. This has been fixed.
=item *
-A goal is for Perl to be able to be recompiled to work reasonably well on any
-Unicode version. In Perl 5.22, though, the earliest such version is Unicode
-5.1 (current is 7.0).
-
-=item *
+Configuring with ccflags containing quotes (e.g.
+C<< -Accflags='-DAPPLLIB_EXP=\"/usr/libperl\"' >>) was broken in Perl 5.22.0
+but has now been fixed again.
+L<[perl #125314]|https://rt.perl.org/Ticket/Display.html?id=125314>
-EBCDIC platforms
+=back
-=over 4
+=head1 Platform Support
-=item *
+=head2 Platform-Specific Notes
-The C<cmp> (and hence C<sort>) operators do not necessarily give the
-correct results when both operands are UTF-EBCDIC encoded strings and
-there is a mixture of ASCII and/or control characters, along with other
-characters.
+=over 4
-=item *
+=item IRIX
-Ranges containing C<\N{...}> in the C<tr///> (and C<y///>)
-transliteration operators are treated differently than the equivalent
-ranges in regular expression patterns. They should, but don't, cause
-the values in the ranges to all be treated as Unicode code points, and
-not native ones. (L<perlre/Version 8 Regular Expressions> gives
-details as to how it should work.)
+=over
=item *
-Encode and encoding are mostly broken.
+Under some circumstances IRIX stdio fgetc() and fread() set the errno to
+C<ENOENT>, which made no sense according to either IRIX or POSIX docs. Errno
+is now cleared in such cases.
+L<[perl #123977]|https://rt.perl.org/Ticket/Display.html?id=123977>
=item *
-Many CPAN modules that are shipped with core show failing tests.
+Problems when multiplying long doubles by infinity have been fixed.
+L<[perl #126396]|https://rt.perl.org/Ticket/Display.html?id=126396>
=item *
-C<pack>/C<unpack> with C<"U0"> format may not work properly.
+All tests pass now on IRIX with the default build configuration.
=back
-=item *
+=back
-The following modules are known to have test failures with this version of
-Perl. In many cases, patches have been submitted, so there will hopefully be
-new releases soon:
+=head1 Selected Bug Fixes
-=over
+=over 4
=item *
-L<B::Generate> version 1.50
+C<qr/(?[ () ])/> no longer segfaults, giving a syntax error message instead.
+L<[perl #125805]|https://rt.perl.org/Ticket/Display.html?id=125805>
=item *
-L<B::Utils> version 0.25
+Regular expression possessive quantifier Perl 5.20 regression now fixed.
+C<qr/>I<PAT>C<{>I<min>,I<max>C<}+>C</> is supposed to behave identically to
+C<qr/(?E<gt>>I<PAT>C<{>I<min>,I<max>C<})/>. Since Perl 5.20, this didn't work
+if I<min> and I<max> were equal.
+L<[perl #125825]|https://rt.perl.org/Ticket/Display.html?id=125825>
=item *
-L<Coro> version 6.42
+Certain syntax errors in
+L<perlrecharclass/Extended Bracketed Character Classes> caused panics instead
+of the proper error message. This has now been fixed.
+L<[perl #126481]|https://rt.perl.org/Ticket/Display.html?id=126481>
=item *
-L<Dancer> version 1.3130
+C<< BEGIN <> >> no longer segfaults and properly produces an error message.
+L<[perl #125341]|https://rt.perl.org/Ticket/Display.html?id=125341>
=item *
-L<Data::Alias> version 1.18
+A regression from Perl 5.20 has been fixed, in which some syntax errors in
+L<C<(?[...])>|perlrecharclass/Extended Bracketed Character Classes> constructs
+within regular expression patterns could cause a segfault instead of a proper
+error message.
+L<[perl #126180]|https://rt.perl.org/Ticket/Display.html?id=126180>
=item *
-L<Data::Dump::Streamer> version 2.38
+Another problem with
+L<C<(?[...])>|perlrecharclass/Extended Bracketed Character Classes>
+constructs has been fixed wherein things like C<\c]> could cause panics.
+L<[perl #126181]|https://rt.perl.org/Ticket/Display.html?id=126181>
=item *
-L<Data::Util> version 0.63
+In Perl 5.22.0, the logic changed when parsing a numeric parameter to the -C
+option, such that the successfully parsed number was not saved as the option
+value if it parsed to the end of the argument.
+L<[perl #125381]|https://rt.perl.org/Ticket/Display.html?id=125381>
=item *
-L<Devel::Spy> version 0.07
+Warning fatality is now ignored when rewinding the stack. This prevents
+infinite recursion when the now fatal error also causes rewinding of the stack.
+L<[perl #123398]|https://rt.perl.org/Ticket/Display.html?id=123398>
=item *
-L<invoker> version 0.34
+A crash with C<< %::=(); J->${\"::"} >> has been fixed.
+L<[perl #125541]|https://rt.perl.org/Ticket/Display.html?id=125541>
=item *
-L<Lexical::Var> version 0.009
+Nested quantifiers such as C</.{1}??/> should cause perl to throw a fatal
+error, but were being silently accepted since Perl 5.20.0. This has been
+fixed.
+L<[perl #126253]|https://rt.perl.org/Ticket/Display.html?id=126253>
=item *
-L<LWP::ConsoleLogger> version 0.000018
+Regular expression sequences such as C</(?i/> (and similarly with other
+recognized flags or combination of flags) should cause perl to throw a fatal
+error, but were being silently accepted since Perl 5.18.0. This has been
+fixed.
+L<[perl #126178]|https://rt.perl.org/Ticket/Display.html?id=126178>
=item *
-L<Mason> version 2.22
+A bug in hexadecimal floating point literal support meant that high-order bits
+could be lost in cases where mantissa overflow was caused by too many trailing
+zeros in the fractional part. This has been fixed.
+L<[perl #126582]|https://rt.perl.org/Ticket/Display.html?id=126582>
=item *
-L<NgxQueue> version 0.02
+Another hexadecimal floating point bug, causing low-order bits to be lost in
+cases where the last hexadecimal digit of the mantissa has bits straddling the
+limit of the number of bits allowed for the mantissa, has also been fixed.
+L<[perl #126586]|https://rt.perl.org/Ticket/Display.html?id=126586>
=item *
-L<Padre> version 1.00
+Further hexadecimal floating point bugs have been fixed: In some circumstances,
+the C<%a> format specifier could variously lose the sign of the negative zero,
+fail to display zeros after the radix point with the requested precision, or
+even lose the radix point after the leftmost hexadecimal digit completely.
=item *
-L<Parse::Keyword> 0.08
-
-=back
+A crash caused by incomplete expressions within C<< /(?[ ])/ >> (e.g.
+C<< /(?[[0]+()+])/ >>) has been fixed.
+L<[perl #126615]|https://rt.perl.org/Ticket/Display.html?id=126615>
=back
-=head1 Obituary
-
-Brian McCauley died on May 8, 2015. He was a frequent poster to Usenet, Perl
-Monks, and other Perl forums, and made several CPAN contributions under the
-nick NOBULL, including to the Perl FAQ. He attended almost every
-YAPC::Europe, and indeed, helped organise YAPC::Europe 2006 and the QA
-Hackathon 2009. His wit and his delight in intricate systems were
-particularly apparent in his love of board games; many Perl mongers will
-have fond memories of playing Fluxx and other games with Brian. He will be
-missed.
-
=head1 Acknowledgements
-Perl 5.22.0 represents approximately 12 months of development since Perl 5.20.0
-and contains approximately 590,000 lines of changes across 2,400 files from 94
+Perl 5.22.1 represents approximately 6 months of development since Perl 5.22.0
+and contains approximately 19,000 lines of changes across 130 files from 27
authors.
Excluding auto-generated files, documentation and release tools, there were
-approximately 370,000 lines of changes to 1,500 .pm, .t, .c and .h files.
+approximately 1,700 lines of changes to 44 .pm, .t, .c and .h files.
Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.22.0:
-
-Aaron Crane, Abhijit Menon-Sen, Abigail, Alberto Simões, Alex Solovey, Alex
-Vandiver, Alexandr Ciornii, Alexandre (Midnite) Jousset, Andreas König,
-Andreas Voegele, Andrew Fresh, Andy Dougherty, Anthony Heading, Aristotle
-Pagaltzis, brian d foy, Brian Fraser, Chad Granum, Chris 'BinGOs' Williams,
-Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, Darin McBride, Dave
-Rolsky, David Golden, David Mitchell, David Wheeler, Dmitri Tikhonov, Doug
-Bell, E. Choroba, Ed J, Eric Herman, Father Chrysostomos, George Greer, Glenn
-D. Golden, Graham Knop, H.Merijn Brand, Herbert Breunung, Hugo van der Sanden,
-James E Keenan, James McCoy, James Raspass, Jan Dubois, Jarkko Hietaniemi,
-Jasmine Ngan, Jerry D. Hedden, Jim Cromie, John Goodyear, kafka, Karen
-Etheridge, Karl Williamson, Kent Fredric, kmx, Lajos Veres, Leon Timmermans,
-Lukas Mai, Mathieu Arnold, Matthew Horsfall, Max Maischein, Michael Bunk,
-Nicholas Clark, Niels Thykier, Niko Tyni, Norman Koch, Olivier Mengué, Peter
-John Acklam, Peter Martini, Petr Písař, Philippe Bruhat (BooK), Pierre
-Bogossian, Rafael Garcia-Suarez, Randy Stauner, Reini Urban, Ricardo Signes,
-Rob Hoelz, Rostislav Skudnov, Sawyer X, Shirakata Kentaro, Shlomi Fish,
-Sisyphus, Slaven Rezic, Smylers, Steffen Müller, Steve Hay, Sullivan Beck,
-syber, Tadeusz Sośnierz, Thomas Sibley, Todd Rinaldo, Tony Cook, Vincent Pit,
-Vladimir Marek, Yaroslav Kuzmin, Yves Orton, Ævar Arnfjörð Bjarmason.
+of users and developers. The following people are known to have contributed
+the improvements that became Perl 5.22.1:
+
+Aaron Crane, Abigail, Andy Broad, Aristotle Pagaltzis, Chase Whitener, Chris
+'BinGOs' Williams, Craig A. Berry, Daniel Dragan, David Mitchell, Father
+Chrysostomos, Herbert Breunung, Hugo van der Sanden, James E Keenan, Jan
+Dubois, Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Lukas Mai, Matthew
+Horsfall, Peter Martini, Rafael Garcia-Suarez, Ricardo Signes, Shlomi Fish,
+Sisyphus, Steve Hay, Tony Cook, Victor Adam.
The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
+from version control history. In particular, it does not include the names of
the (very much appreciated) contributors who reported issues to the Perl bug
tracker.
Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
+included in Perl's core. We're grateful to the entire CPAN community for
helping Perl to flourish.
For a more complete list of all of Perl's historical contributors, please see
If you find what you think is a bug, you might check the articles recently
posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-L<https://rt.perl.org/>. There may also be information at
-L<http://www.perl.org/>, the Perl Home Page.
+https://rt.perl.org/ . There may also be information at
+http://www.perl.org/ , the Perl Home Page.
If you believe you have an unreported bug, please run the L<perlbug> program
included with your release. Be sure to trim your bug down to a tiny but
(W overflow) The hexadecimal floating point has a smaller exponent
than the floating point supports.
-=item Hexadecimal float: internal error
+=item Hexadecimal float: internal error (%s)
(F) Something went horribly bad in hexadecimal float handling.
S<<-- HERE> shows whereabouts in the regular expression the problem was
discovered.
+=item Sequence (?... not terminated in regex; marked by S<<-- HERE> in
+m/%s/
+
+(F) There was no matching closing parenthesis for the '('. The
+S<<-- HERE> shows whereabouts in the regular expression the problem was
+discovered.
+
=item Sequence \%s... not terminated in regex; marked by S<<-- HERE> in
m/%s/
Ranges containing C<\N{...}> in the C<tr///> (and C<y///>)
transliteration operators are treated differently than the equivalent
-ranges in regular expression pattersn. They should, but don't, cause
+ranges in regular expression patterns. They should, but don't, cause
the values in the ranges to all be treated as Unicode code points, and
not native ones. (L<perlre/Version 8 Regular Expressions> gives
details as to how it should work.)
# same thing, but much more efficiently;
# we'll build auxiliary indices instead
# for speed
- my @nums = @caps = ();
+ my (@nums, @caps);
for (@old) {
push @nums, ( /=(\d+)/ ? $1 : undef );
push @caps, fc($_);
function calls the underlying operating system's I<open>(2) function with the
parameters FILENAME, MODE, and PERMS.
+Returns true on success and C<undef> otherwise.
+
The possible values and flag bits of the MODE parameter are
system-dependent; they are available via the standard module C<Fcntl>. See
the documentation of your operating system's I<open>(2) syscall to see
Steve 5.20.1 2014-Sep-14
Steve 5.20.2-RC1 2015-Jan-31
Steve 5.20.2 2015-Feb-14
+ Steve 5.20.3-RC1 2015-Aug-22
+ Steve 5.20.3-RC2 2015-Aug-29
+ Steve 5.20.3 2015-Sep-12
Ricardo 5.21.0 2014-May-27 The 5.21 development track
Matthew H 5.21.1 2014-Jun-20
Ricardo 5.22.0-RC1 2015-May-19 The 5.22 maintenance track
Ricardo 5.22.0-RC2 2015-May-21
Ricardo 5.22.0 2015-Jun-01
+ Steve 5.22.1-RC1 2015-Oct-31
+ Steve 5.22.1-RC2 2015-Nov-15
+ Steve 5.22.1-RC3 2015-Dec-02
+ Steve 5.22.1-RC4 2015-Dec-08
+ Steve 5.22.1 2015-Dec-13
+
+ Ricardo 5.23.0 2015-Jun-20 The 5.23 development track
+ Matthew 5.23.1 2015-Jul-20
+ Matthew 5.23.2 2015-Aug-20
+ Peter 5.23.3 2015-Sep-20
+ Steve 5.23.4 2015-Oct-20
+ Abigail 5.23.5 2015-Nov-20
=head2 SELECTED RELEASE SIZES
my $bar = $foo;
bless $foo, 'Class';
- print blessed( $bar ); # prints "Class"
+ print blessed( $bar ) // 'not blessed'; # prints "Class"
$bar = "some other value";
- print blessed( $bar ); # prints undef
+ print blessed( $bar ) // 'not blessed'; # prints "not blessed"
When we call C<bless> on a variable, we are actually blessing the
underlying data structure that the variable refers to. We are not
Note that both C<<< << >>> and C<<< >> >>> in Perl are implemented directly using
C<<< << >>> and C<<< >> >>> in C. If S<C<use integer>> (see L<Integer Arithmetic>) is
in force then signed C integers are used, else unsigned C integers are
-used. Either way, the implementation isn't going to generate results
+used, even for negative shiftees. Either way, the implementation isn't going to generate results
larger than the size of the integer type Perl was built with (32 bits
or 64 bits).
=item *
+Patches that fix bugs in features that were new in the corresponding 5.x.0
+stable release.
+
+=item *
+
Patches that fix anything which prevents or seriously impacts the build
or installation of perl.
sarcasm. It is not enough to be factual. You must also be civil. Responding
in kind to incivility is not acceptable.
+While civility is required, kindness is encouraged; if you have any doubt about
+whether you are being civil, simply ask yourself, "Am I being kind?" and aspire
+to that.
+
If the list moderators tell you that you are not being civil, carefully
-consider how your words have appeared before responding in any way. You may
-protest, but repeated protest in the face of a repeatedly reaffirmed decision
-is not acceptable.
+consider how your words have appeared before responding in any way. Were they
+kind? You may protest, but repeated protest in the face of a repeatedly
+reaffirmed decision is not acceptable.
Unacceptable behavior will result in a public and clearly identified warning.
Repeated unacceptable behavior will result in removal from the mailing list and
=head2 Modifiers
+=head3 Overview
+
Matching operations can have various modifiers. Modifiers
that relate to the interpretation of the regular expression inside
are listed below. Modifiers that alter the way a regular expression
Regular expression modifiers are usually written in documentation
as e.g., "the C</x> modifier", even though the delimiter
-in question might not really be a slash. The modifiers C</imsxadlup>
+in question might not really be a slash. The modifiers C</imnsxadlup>
may also be embedded within the regular expression itself using
the C<(?...)> construct, see L</Extended Patterns> below.
-=head3 /x
+=head3 Details on some modifiers
+
+Some of the modifiers require more explanation than given in the
+L</Overview> above.
+
+=head4 /x
C</x> tells
the regular expression parser to ignore most whitespace that is neither
U+2028 LINE SEPARATOR
U+2029 PARAGRAPH SEPARATOR
-=head3 Character set modifiers
+=head4 Character set modifiers
C</d>, C</u>, C</a>, and C</l>, available starting in 5.14, are called
the character set modifiers; they affect the character set rules
See L</E<sol>x> for another way to have comments in patterns.
-=item C<(?adlupimsx-imsx)>
+=item C<(?adlupimnsx-imnsx)>
-=item C<(?^alupimsx)>
+=item C<(?^alupimnsx)>
X<(?)> X<(?^)>
One or more embedded pattern-match modifiers, to be turned on (or
L<re/"'/flags' mode">.
Starting in Perl 5.14, a C<"^"> (caret or circumflex accent) immediately
-after the C<"?"> is a shorthand equivalent to C<d-imsx>. Flags (except
+after the C<"?"> is a shorthand equivalent to C<d-imnsx>. Flags (except
C<"d">) may follow the caret to override it.
But a minus sign is not legal with it.
=item C<(?:pattern)>
X<(?:)>
-=item C<(?adluimsx-imsx:pattern)>
+=item C<(?adluimnsx-imnsx:pattern)>
-=item C<(?^aluimsx:pattern)>
+=item C<(?^aluimnsx:pattern)>
X<(?^:)>
This is for clustering, not capturing; it groups subexpressions like
characters if you don't need to.
Any letters between C<?> and C<:> act as flags modifiers as with
-C<(?adluimsx-imsx)>. For example,
+C<(?adluimnsx-imnsx)>. For example,
/(?s-i:more.*than).*million/i
/(?:(?s-i)more.*than).*million/i
+Note that any C<(...)> constructs enclosed within this one will still
+capture unless the C</n> modifier is in effect.
+
Starting in Perl 5.14, a C<"^"> (caret or circumflex accent) immediately
-after the C<"?"> is a shorthand equivalent to C<d-imsx>. Any positive
+after the C<"?"> is a shorthand equivalent to C<d-imnsx>. Any positive
flags (except C<"d">) may follow the caret, so
(?^x:foo)
is equivalent to
- (?x-ims:foo)
+ (?x-imns:foo)
The caret tells Perl that this cluster doesn't inherit the flags of any
-surrounding pattern, but uses the system defaults (C<d-imsx>),
+surrounding pattern, but uses the system defaults (C<d-imnsx>),
modified by any flags specified.
The caret allows for simpler stringification of compiled regular
The signature is part of a subroutine's body. Normally the body of a
subroutine is simply a braced block of code. When using a signature,
the signature is a parenthesised list that goes immediately after
-the subroutine name. The signature declares lexical variables that are
+the subroutine name (or, for anonymous subroutines, immediately after
+the C<sub> keyword). The signature declares lexical variables that are
in scope for the block. When the subroutine is called, the signature
takes control first. It populates the signature variables from the
list of arguments that were passed. If the argument list doesn't meet
X<FIRSTKEY>
This method will be triggered when the user is going
-to iterate through the hash, such as via a keys() or each()
-call.
+to iterate through the hash, such as via a keys(), values(), or each() call.
sub FIRSTKEY {
carp &whowasi if $DEBUG;
each %{$self->{LIST}}
}
+FIRSTKEY is always called in scalar context and it should just
+return the first key. values(), and each() in list context,
+will call FETCH for the returned keys.
+
=item NEXTKEY this, lastkey
X<NEXTKEY>
-This method gets triggered during a keys() or each() iteration. It has a
+This method gets triggered during a keys(), values(), or each() iteration. It has a
second argument which is the last key that had been accessed. This is
-useful if you're carrying about ordering or calling the iterator from more
+useful if you're caring about ordering or calling the iterator from more
than one sequence, or not really storing things in a hash anywhere.
+NEXTKEY is always called in scalar context and it should just
+return the next key. values(), and each() in list context,
+will call FETCH for the returned keys.
+
For our example, we're using a real hash so we'll do just the simple
thing, but we'll have to go through the LIST field indirectly.
# cpan -i Unicode::Unihan
use Unicode::Unihan;
my $str = "東京";
- my $unhan = new Unicode::Unihan;
+ my $unhan = Unicode::Unihan->new;
for my $lang (qw(Mandarin Cantonese Korean JapaneseOn JapaneseKun)) {
printf "CJK $str in %-12s is ", $lang;
say $unhan->$lang($str);
# cpan -i Lingua::JA::Romanize::Japanese
use Lingua::JA::Romanize::Japanese;
- my $k2r = new Lingua::JA::Romanize::Japanese;
+ my $k2r = Lingua::JA::Romanize::Japanese->new;
my $str = "東京";
say "Japanese for $str is ", $k2r->chars($str);
use charnames qw(:full);
my $para = "This is a super\N{HYPHEN}long string. " x 20;
- my $fmt = new Unicode::LineBreak;
+ my $fmt = Unicode::LineBreak->new;
print $fmt->break($para), "\n";
=head2 ℞ 42: Unicode text in DBM hashes, the tedious way
# So the Asian stuff comes out in an order that someone
# who reads those scripts won't freak out over; the
# CJK stuff will be in JIS X 0208 order that way.
- my $coll = new Unicode::Collate::Locale locale => "ja";
+ my $coll = Unicode::Collate::Locale->new(locale => "ja");
for my $item ($coll->sort(keys %price)) {
print pad(entitle($item), $width, ".");
=head1 REVISION HISTORY
v1.0.0 – first public release, 2012-02-27
-
Within a subroutine the array C<@_> contains the parameters passed to
that subroutine. Inside a subroutine, C<@_> is the default array for
-the array operators C<push>, C<pop>, C<shift>, and C<unshift>.
+the array operators C<pop> and C<shift>.
See L<perlsub>.
for string literal version checks and bad for comparing to a variable
that hasn't been sanity-checked.
+The C<$OLD_PERL_VERSION> form was added in Perl v5.20.0 for historical
+reasons but its use is discouraged. (If your reason to use C<$]> is to
+run code on old perls then referring to it as C<$OLD_PERL_VERSION> would
+be self-defeating.)
+
Mnemonic: Is this version of perl in the right bracket?
=item $SYSTEM_FD_MAX
value. For example, C<$!{ENOENT}> is true if and only if the current
value of C<$!> is C<ENOENT>; that is, if the most recent error was "No
such file or directory" (or its moral equivalent: not all operating
-systems give that exact error, and certainly not all languages). To
-check if a particular key is meaningful on your system, use C<exists
-$!{the_key}>; for a list of legal keys, use C<keys %!>. See L<Errno>
-for more information, and also see L</$!>.
+systems give that exact error, and certainly not all languages). The
+specific true value is not guaranteed, but in the past has generally
+been the numeric value of C<$!>. To check if a particular key is
+meaningful on your system, use C<exists $!{the_key}>; for a list of legal
+keys, use C<keys %!>. See L<Errno> for more information, and also see
+L</$!>.
This variable was added in Perl 5.005.
NV right = SvNV_nomg(svr);
NV left = SvNV_nomg(svl);
(void)POPs;
+#if defined(__sgi) && defined(USE_LONG_DOUBLE) && LONG_DOUBLEKIND == LONG_DOUBLE_IS_DOUBLEDOUBLE_128_BIT_BIG_ENDIAN && NVSIZE == 16
+ {
+ NV result = left * right;
+ if (Perl_isinf(result)) {
+ Zero((U8*)&result + 8, 8, U8);
+ }
+ SETn( result );
+ }
+#else
SETn( left * right );
+#endif
RETURN;
}
}
}
while (cdouble < 0.0)
cdouble += anv;
- cdouble = Perl_modf(cdouble / anv, &trouble) * anv;
+ cdouble = Perl_modf(cdouble / anv, &trouble);
+#ifdef LONGDOUBLE_DOUBLEDOUBLE
+ /* Workaround for powerpc doubledouble modfl bug:
+ * close to 1.0L and -1.0L cdouble is 0, and trouble
+ * is cdouble / anv. */
+ if (trouble != Perl_ceil(trouble)) {
+ cdouble = trouble;
+ if (cdouble > 1.0L) cdouble -= 1.0L;
+ if (cdouble < -1.0L) cdouble += 1.0L;
+ }
+#endif
+ cdouble *= anv;
sv = newSVnv(cdouble);
}
else {
* !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
* This file is built by regen/reentr.pl from data in regen/reentr.pl.
* Any changes made here will be lost!
- *
+ */
+
+/*
* "Saruman," I said, standing away from him, "only one hand at a time can
* wield the One, and you know that well, so do not trouble to say we!"
*
+ * [p.260 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
+ */
+
+/*
* This file contains a collection of automatically created wrappers
* (created by running reentr.pl) for reentrant (thread-safe) versions of
* various library calls, such as getpwent_r. The wrapping is done so
++RExC_parse;
}
- if (PASS2) {
- STD_PMMOD_FLAGS_PARSE_X_WARN(x_mod_count);
- }
+ vFAIL("Sequence (?... not terminated");
}
/*
ret = reg_node(pRExC_state, OPFAIL);
return ret;
}
- else if (min == max
- && RExC_parse < RExC_end
- && (*RExC_parse == '?' || *RExC_parse == '+'))
+ else if (min == max && RExC_parse < RExC_end && *RExC_parse == '?')
{
if (PASS2) {
ckWARN2reg(RExC_parse + 1,
"Useless use of greediness modifier '%c'",
*RExC_parse);
}
- /* Absorb the modifier, so later code doesn't see nor use
- * it */
- nextchar(pRExC_state);
}
do_curly:
* default: case next time and keep on incrementing until
* we find one of the invariants we do handle. */
RExC_parse++;
+ if (*RExC_parse == 'c') {
+ /* Skip the \cX notation for control characters */
+ RExC_parse++;
+ }
break;
case '[':
{
* a stack. Each entry on the stack is a single character representing one
* of the operators; or else a pointer to an operand inversion list. */
-#define IS_OPERAND(a) (! SvIOK(a))
+#define IS_OPERATOR(a) SvIOK(a)
+#define IS_OPERAND(a) (! IS_OPERATOR(a))
/* The stack is kept in Łukasiewicz order. (That's pronounced similar
* to luke-a-shave-itch (or -itz), but people who didn't want to bother
/* If the top entry on the stack is an operator, it had
* better be a '!', otherwise the entry below the top
* operand should be an operator */
- if ( ! (top_ptr = av_fetch(stack, top_index, FALSE))
- || (! IS_OPERAND(*top_ptr) && SvUV(*top_ptr) != '!')
- || top_index - fence < 1
- || ! (stacked_ptr = av_fetch(stack,
- top_index - 1,
- FALSE))
- || IS_OPERAND(*stacked_ptr))
+ if ( ! (top_ptr = av_fetch(stack, top_index, FALSE))
+ || (IS_OPERATOR(*top_ptr) && SvUV(*top_ptr) != '!')
+ || ( IS_OPERAND(*top_ptr)
+ && ( top_index - fence < 1
+ || ! (stacked_ptr = av_fetch(stack,
+ top_index - 1,
+ FALSE))
+ || ! IS_OPERATOR(*stacked_ptr))))
{
RExC_parse++;
vFAIL("Unexpected '(' with no preceding operator");
/* Having gotten rid of the fence, we pop the operand at the
* stack top and process it as a newly encountered operand */
current = av_pop(stack);
- assert(IS_OPERAND(current));
- goto handle_operand;
+ if (IS_OPERAND(current)) {
+ goto handle_operand;
+ }
+
+ RExC_parse++;
+ goto bad_syntax;
case '&':
case '|':
/* Here, the new operator has equal or lower precedence than
* what's already there. This means the operation already
* there should be performed now, before the new one. */
+
rhs = av_pop(stack);
+ if (! IS_OPERAND(rhs)) {
+
+ /* This can happen when a ! is not followed by an operand,
+ * like in /(?[\t &!])/ */
+ goto bad_syntax;
+ }
+
lhs = av_pop(stack);
- assert(IS_OPERAND(rhs));
- assert(IS_OPERAND(lhs));
+ if (! IS_OPERAND(lhs)) {
+
+ /* This can happen when there is an empty (), like in
+ * /(?[[0]+()+])/ */
+ goto bad_syntax;
+ }
switch (stacked_operator) {
case '&':
av_push(stack, rhs);
goto redo_curchar;
- case '!': /* Highest priority, right associative, so just push
- onto stack */
- av_push(stack, newSVuv(curchar));
+ case '!': /* Highest priority, right associative */
+
+ /* If what's already at the top of the stack is another '!",
+ * they just cancel each other out */
+ if ( (top_ptr = av_fetch(stack, top_index, FALSE))
+ && (IS_OPERATOR(*top_ptr) && SvUV(*top_ptr) == '!'))
+ {
+ only_to_avoid_leaks = av_pop(stack);
+ SvREFCNT_dec(only_to_avoid_leaks);
+ }
+ else { /* Otherwise, since it's right associative, just push
+ onto the stack */
+ av_push(stack, newSVuv(curchar));
+ }
break;
default:
* be an operator */
top_ptr = av_fetch(stack, top_index, FALSE);
assert(top_ptr);
- if (! IS_OPERAND(*top_ptr)) {
+ if (IS_OPERATOR(*top_ptr)) {
/* The only permissible operator at the top of the stack is
* '!', which is applied immediately to this operand. */
if (av_tindex(stack) < 0 /* Was empty */
|| ((final = av_pop(stack)) == NULL)
|| ! IS_OPERAND(final)
+ || SvTYPE(final) != SVt_INVLIST
|| av_tindex(stack) >= 0) /* More left on stack */
{
+ bad_syntax:
SvREFCNT_dec(final);
vFAIL("Incomplete expression within '(?[ ])'");
}
Set_Node_Length(node, RExC_parse - oregcomp_parse + 1); /* MJD */
return node;
}
+#undef IS_OPERATOR
#undef IS_OPERAND
STATIC void
# Prepare to write the reentr.c.
my $c = open_print_header('reentr.c', <<'EOQ');
- *
+ */
+
+/*
* "Saruman," I said, standing away from him, "only one hand at a time can
* wield the One, and you know that well, so do not trouble to say we!"
*
+ * [p.260 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
+ */
+
+/*
* This file contains a collection of automatically created wrappers
* (created by running reentr.pl) for reentrant (thread-safe) versions of
* various library calls, such as getpwent_r. The wrapping is done so
#
# This script is normally invoked from regen.pl.
-$VERSION = '1.03';
+$VERSION = '1.34';
BEGIN {
require 'regen/regen_lib.pl';
}
while (<DATA>) {
+ last if /^VERSION$/ ;
+ print $pm $_ ;
+}
+
+print $pm qq(our \$VERSION = "$::VERSION";\n);
+
+while (<DATA>) {
last if /^KEYWORDS$/ ;
print $pm $_ ;
}
__END__
package warnings;
-our $VERSION = '1.32';
+VERSION
# Verify that we're called correctly so that warnings will work.
# see also strict.pm.
package MyMod::Abc;
sub open {
- warnings::warnif("deprecated",
- "open is deprecated, use new instead");
+ if (warnings::enabled("deprecated")) {
+ warnings::warn("deprecated",
+ "open is deprecated, use new instead");
+ }
new(@_);
}
FBC_BOUND(isWORDCHAR_L1, isWORDCHAR_uni, isWORDCHAR_utf8);
break;
case GCB_BOUND:
- if (s == reginfo->strbeg) { /* GCB always matches at begin and
- end */
- if (to_complement ^ cBOOL(reginfo->intuit
- || regtry(reginfo, &s)))
+ if (s == reginfo->strbeg) {
+ if (reginfo->intuit || regtry(reginfo, &s))
{
goto got_it;
}
+
+ /* Didn't match. Try at the next position (if there is one) */
s += (utf8_target) ? UTF8SKIP(s) : 1;
+ if (UNLIKELY(s >= reginfo->strend)) {
+ break;
+ }
}
if (utf8_target) {
while (s < strend) {
GCB_enum after = getGCB_VAL_UTF8((U8*) s,
(U8*) reginfo->strend);
- if (to_complement ^ isGCB(before, after)) {
- if (reginfo->intuit || regtry(reginfo, &s)) {
- goto got_it;
- }
- before = after;
+ if ( (to_complement ^ isGCB(before, after))
+ && (reginfo->intuit || regtry(reginfo, &s)))
+ {
+ goto got_it;
}
+ before = after;
s += UTF8SKIP(s);
}
}
else { /* Not utf8. Everything is a GCB except between CR and
LF */
while (s < strend) {
- if (to_complement ^ (UCHARAT(s - 1) != '\r'
- || UCHARAT(s) != '\n'))
+ if ((to_complement ^ ( UCHARAT(s - 1) != '\r'
+ || UCHARAT(s) != '\n'))
+ && (reginfo->intuit || regtry(reginfo, &s)))
{
- if (reginfo->intuit || regtry(reginfo, &s)) {
- goto got_it;
- }
- s++;
+ goto got_it;
}
+ s++;
}
}
- if (to_complement ^ cBOOL(reginfo->intuit || regtry(reginfo, &s))) {
+ if ((reginfo->intuit || regtry(reginfo, &s))) {
goto got_it;
}
break;
case SB_BOUND:
- if (s == reginfo->strbeg) { /* SB always matches at beginning */
- if (to_complement
- ^ cBOOL(reginfo->intuit || regtry(reginfo, &s)))
- {
+ if (s == reginfo->strbeg) {
+ if (reginfo->intuit || regtry(reginfo, &s)) {
goto got_it;
}
-
- /* Didn't match. Go try at the next position */
s += (utf8_target) ? UTF8SKIP(s) : 1;
+ if (UNLIKELY(s >= reginfo->strend)) {
+ break;
+ }
}
if (utf8_target) {
while (s < strend) {
SB_enum after = getSB_VAL_UTF8((U8*) s,
(U8*) reginfo->strend);
- if (to_complement ^ isSB(before,
- after,
- (U8*) reginfo->strbeg,
- (U8*) s,
- (U8*) reginfo->strend,
- utf8_target))
+ if ((to_complement ^ isSB(before,
+ after,
+ (U8*) reginfo->strbeg,
+ (U8*) s,
+ (U8*) reginfo->strend,
+ utf8_target))
+ && (reginfo->intuit || regtry(reginfo, &s)))
{
- if (reginfo->intuit || regtry(reginfo, &s)) {
- goto got_it;
- }
- before = after;
+ goto got_it;
}
+ before = after;
s += UTF8SKIP(s);
}
}
SB_enum before = getSB_VAL_CP((U8) *(s -1));
while (s < strend) {
SB_enum after = getSB_VAL_CP((U8) *s);
- if (to_complement ^ isSB(before,
- after,
- (U8*) reginfo->strbeg,
- (U8*) s,
- (U8*) reginfo->strend,
- utf8_target))
+ if ((to_complement ^ isSB(before,
+ after,
+ (U8*) reginfo->strbeg,
+ (U8*) s,
+ (U8*) reginfo->strend,
+ utf8_target))
+ && (reginfo->intuit || regtry(reginfo, &s)))
{
- if (reginfo->intuit || regtry(reginfo, &s)) {
- goto got_it;
- }
- before = after;
+ goto got_it;
}
+ before = after;
s++;
}
}
/* Here are at the final position in the target string. The SB
* value is always true here, so matches, depending on other
* constraints */
- if (to_complement ^ cBOOL(reginfo->intuit
- || regtry(reginfo, &s)))
- {
+ if (reginfo->intuit || regtry(reginfo, &s)) {
goto got_it;
}
case WB_BOUND:
if (s == reginfo->strbeg) {
- if (to_complement ^ cBOOL(reginfo->intuit
- || regtry(reginfo, &s)))
- {
+ if (reginfo->intuit || regtry(reginfo, &s)) {
goto got_it;
}
s += (utf8_target) ? UTF8SKIP(s) : 1;
+ if (UNLIKELY(s >= reginfo->strend)) {
+ break;
+ }
}
if (utf8_target) {
while (s < strend) {
WB_enum after = getWB_VAL_UTF8((U8*) s,
(U8*) reginfo->strend);
- if (to_complement ^ isWB(previous,
- before,
- after,
- (U8*) reginfo->strbeg,
- (U8*) s,
- (U8*) reginfo->strend,
- utf8_target))
+ if ((to_complement ^ isWB(previous,
+ before,
+ after,
+ (U8*) reginfo->strbeg,
+ (U8*) s,
+ (U8*) reginfo->strend,
+ utf8_target))
+ && (reginfo->intuit || regtry(reginfo, &s)))
{
- if (reginfo->intuit || regtry(reginfo, &s)) {
- goto got_it;
- }
- previous = before;
- before = after;
+ goto got_it;
}
+ previous = before;
+ before = after;
s += UTF8SKIP(s);
}
}
WB_enum before = getWB_VAL_CP((U8) *(s -1));
while (s < strend) {
WB_enum after = getWB_VAL_CP((U8) *s);
- if (to_complement ^ isWB(previous,
- before,
- after,
- (U8*) reginfo->strbeg,
- (U8*) s,
- (U8*) reginfo->strend,
- utf8_target))
+ if ((to_complement ^ isWB(previous,
+ before,
+ after,
+ (U8*) reginfo->strbeg,
+ (U8*) s,
+ (U8*) reginfo->strend,
+ utf8_target))
+ && (reginfo->intuit || regtry(reginfo, &s)))
{
- if (reginfo->intuit || regtry(reginfo, &s)) {
- goto got_it;
- }
- previous = before;
- before = after;
+ goto got_it;
}
+ previous = before;
+ before = after;
s++;
}
}
- if (to_complement ^ cBOOL(reginfo->intuit
- || regtry(reginfo, &s)))
- {
+ if (reginfo->intuit || regtry(reginfo, &s)) {
goto got_it;
}
* to look it up */
if (*previous != WB_UNKNOWN) {
wb = *previous;
- *previous = WB_UNKNOWN;
- /* XXX Note that doesn't change curpos, and maybe should */
- /* But we always back up over these two types */
+ /* But we need to move backwards by one */
+ if (utf8_target) {
+ *curpos = reghopmaybe3(*curpos, -1, strbeg);
+ if (! *curpos) {
+ *previous = WB_EDGE;
+ *curpos = (U8 *) strbeg;
+ }
+ else {
+ *previous = WB_UNKNOWN;
+ }
+ }
+ else {
+ (*curpos)--;
+ *previous = (*curpos <= strbeg) ? WB_EDGE : WB_UNKNOWN;
+ }
+
+ /* And we always back up over these two types */
if (wb != WB_Extend && wb != WB_Format) {
return wb;
}
case BOUNDU: /* /\b/u */
boundu:
- if (utf8_target) {
-
+ if (UNLIKELY(reginfo->strbeg >= reginfo->strend)) {
+ match = FALSE;
+ }
+ else if (utf8_target) {
bound_utf8:
switch((bound_type) FLAGS(scan)) {
case TRADITIONAL_BOUND:
if (UTF8_IS_CONTINUED(*s)) {
while (s > lim && UTF8_IS_CONTINUATION(*s))
s--;
+ if (! UTF8_IS_START(*s)) {
+ dTHX;
+ Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
+ }
}
/* XXX could check well-formedness here */
}
if (UTF8_IS_CONTINUED(*s)) {
while (s > llim && UTF8_IS_CONTINUATION(*s))
s--;
+ if (! UTF8_IS_START(*s)) {
+ dTHX;
+ Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
+ }
}
/* XXX could check well-formedness here */
}
if (UTF8_IS_CONTINUED(*s)) {
while (s > lim && UTF8_IS_CONTINUATION(*s))
s--;
+ if (! UTF8_IS_START(*s)) {
+ dTHX;
+ Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
+ }
}
/* XXX could check well-formedness here */
}
SvREFCNT_inc_simple_void_NN(sv_2mortal(dstr));
}
+ /* freeing dstr's GP might free sstr (e.g. *x = $x),
+ * so temporarily protect it */
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(sstr));
gp_free(MUTABLE_GV(dstr));
GvINTRO_off(dstr); /* one-shot flag */
GvGP_set(dstr, gp_ref(GvGP(sstr)));
+ LEAVE;
+
if (SvTAINTED(sstr))
SvTAINT(dstr);
if (GvIMPORTED(dstr) != GVf_IMPORTED
* The non-double-double-long-double overshoots since all bits of NV
* are not mantissa bits, there are also exponent bits. */
#ifdef LONGDOUBLE_DOUBLEDOUBLE
-# define VHEX_SIZE (1+DOUBLEDOUBLE_MAXBITS/4)
+# define VHEX_SIZE (3+DOUBLEDOUBLE_MAXBITS/4)
#else
# define VHEX_SIZE (1+(NVSIZE * 8)/4)
#endif
/* HEXTRACTSIZE is the maximum number of xdigits. */
#if defined(USE_LONG_DOUBLE) && defined(LONGDOUBLE_DOUBLEDOUBLE)
-# define HEXTRACTSIZE (DOUBLEDOUBLE_MAXBITS/4)
+# define HEXTRACTSIZE (2+DOUBLEDOUBLE_MAXBITS/4)
#else
# define HEXTRACTSIZE 2 * NVSIZE
#endif
const U8* vmaxend = vhex + HEXTRACTSIZE;
PERL_UNUSED_VAR(ix); /* might happen */
(void)Perl_frexp(PERL_ABS(nv), exponent);
- if (vend && (vend <= vhex || vend > vmaxend))
- Perl_croak(aTHX_ "Hexadecimal float: internal error");
+ if (vend && (vend <= vhex || vend > vmaxend)) {
+ /* diag_listed_as: Hexadecimal float: internal error (%s) */
+ Perl_croak(aTHX_ "Hexadecimal float: internal error (entry)");
+ }
{
/* First check if using long doubles. */
#if defined(USE_LONG_DOUBLE) && (NVSIZE > DOUBLESIZE)
* which is convenient since the HEXTRACTSIZE is tricky
* for double-double. */
ixmin < 0 || ixmax >= NVSIZE ||
- (vend && v != vend))
- Perl_croak(aTHX_ "Hexadecimal float: internal error");
+ (vend && v != vend)) {
+ /* diag_listed_as: Hexadecimal float: internal error (%s) */
+ Perl_croak(aTHX_ "Hexadecimal float: internal error (overflow)");
+ }
return v;
}
tryasterisk:
if (*q == '*') {
q++;
- if ( (ewix = expect_number(&q)) )
- if (*q++ != '$')
+ if ( (ewix = expect_number(&q)) ) {
+ if (*q++ == '$')
+ no_redundant_warning = TRUE;
+ else
goto unknown;
+ }
asterisk = TRUE;
}
if (*q == 'v') {
U8* v = vhex; /* working pointer to vhex */
U8* vend; /* pointer to one beyond last digit of vhex */
U8* vfnz = NULL; /* first non-zero */
+ U8* vlnz = NULL; /* last non-zero */
const bool lower = (c == 'a');
/* At output the values of vhex (up to vend) will
* be mapped through the xdig to get the actual
const char* xdig = PL_hexdigit;
int zerotail = 0; /* how many extra zeros to append */
int exponent = 0; /* exponent of the floating point input */
+ bool hexradix = FALSE; /* should we output the radix */
/* XXX: denormals, NaN, Inf.
*
# endif
#endif
- if (fv < 0)
+ if (fv < 0
+ || Perl_signbit(nv)
+ )
*p++ = '-';
else if (plus)
*p++ = plus;
}
if (vfnz) {
- U8* vlnz = NULL; /* The last non-zero. */
-
/* Find the last non-zero xdigit. */
for (v = vend - 1; v >= vhex; v--) {
if (*v) {
v = vhex;
*p++ = xdig[*v++];
- /* The radix is always output after the first
- * non-zero xdigit, or if alt. */
- if (vfnz < vlnz || alt) {
+ /* If there are non-zero xdigits, the radix
+ * is output after the first one. */
+ if (vfnz < vlnz) {
+ hexradix = TRUE;
+ }
+ }
+ else {
+ *p++ = '0';
+ exponent = 0;
+ zerotail = precis;
+ }
+
+ /* The radix is always output if precis, or if alt. */
+ if (precis > 0 || alt) {
+ hexradix = TRUE;
+ }
+
+ if (hexradix) {
#ifndef USE_LOCALE_NUMERIC
*p++ = '.';
#else
}
RESTORE_LC_NUMERIC();
#endif
- }
+ }
+ if (vlnz) {
while (v <= vlnz)
*p++ = xdig[*v++];
-
- while (zerotail--)
- *p++ = '0';
}
- else {
+
+ if (zerotail > 0) {
+ while (zerotail--) {
*p++ = '0';
- exponent = 0;
+ }
}
elen = p - PL_efloatbuf;
elen = quadmath_snprintf(PL_efloatbuf, PL_efloatsize,
qfmt, nv);
if ((IV)elen == -1)
- Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s|'", qfmt);
+ Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt);
if (qfmt != ptr)
Safefree(qfmt);
}
#!./perl
-print "1..103\n";
+print "1..104\n";
$x = 'x';
eval '0; qq{@{sub{]]}}}}}';
print "ok $test - 124385\n"; $test++;
}
+
+{
+ # Used to crash [perl #125350]
+ eval ('qq{@{[0}*sub{]]}}}=sub{0' . "\c[");
+ print "ok $test - 125350\n"; $test++;
+}
SKIP:
for my $test_in ("test\n", "test") {
skip("Guaranteed newline at EOF on VMS", 4) if $^O eq 'VMS' && $test_in eq 'test';
- skip("[perl #71504] OpenBSD test failures in errno.t with ithreads and perlio", 8)
- if $^O eq 'openbsd' && $Config{useithreads} && $perlio eq 'stdio';
+ # perl #71504 added skip in openbsd+threads+stdio;
+ # then commit 23705063 made -lpthread the default.
+ skip("[perl #71504] OpenBSD test failures in errno.t with ithreads and perlio]; [perl #126306: openbsd t/io/errno.t tests fail randomly]", 8)
+ if $^O eq 'openbsd' && $perlio eq 'stdio';
my $test_in_esc = $test_in;
$test_in_esc =~ s/\n/\\n/g;
for my $rs_code ('', '$/=undef', '$/=\2', '$/=\1024') {
<<"foo
EXPECT
Unterminated delimiter for here document at - line 1.
+########
+# NAME BEGIN <> [perl #125341]
+BEGIN <>
+EXPECT
+Illegal declaration of subroutine BEGIN at - line 1.
Use of \b{} or \B{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale at - line 16.
Use of \b{} or \B{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale at - line 17.
Use of \b{} or \B{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale at - line 17.
+Use of \b{} or \B{} for non-UTF-8 locale is wrong. Assuming a UTF-8 locale at - line 17.
# Functions whose names begin with underscore are internal helper functions
# for this file, and are not to be used by outside callers.
+eval { require POSIX; import POSIX 'locale_h'; };
+my $has_posix_locales = defined &POSIX::LC_CTYPE;
+
sub _trylocale ($$$$) { # For use only by other functions in this file!
# Adds the locale given by the first parameter to the list given by the
# category, like 'LC_TIME'. The initial 'LC_' is optional. It is a fatal
# error to call this with something that isn't a known category
- use Config;;
+ use Config;
return 0 unless $Config{d_setlocale}
# I (khw) cargo-culted the '?' in the pattern on the
# next line.
- && $Config{ccflags} !~ /\bD?NO_LOCALE\b/;
+ && $Config{ccflags} !~ /\bD?NO_LOCALE\b/
+ && $has_posix_locales;
# Done with the global possibilities. Now check if any passed in category
# is disabled.
# Done this way in case this is 'required' in the caller before seeing if
# this is miniperl.
- eval { require POSIX; import POSIX 'locale_h'; };
- unless (defined &POSIX::LC_CTYPE) {
- return;
- }
+ return unless $has_posix_locales;
_trylocale("C", $categories, \@Locale, $only_plays_well);
_trylocale("POSIX", $categories, \@Locale, $only_plays_well);
# On z/OS, even locales marked as UTF-8 aren't.
return 0 if ord "A" != 65;
- eval { require POSIX; import POSIX 'locale_h'; };
- return 0 if ! defined &POSIX::LC_CTYPE;
+ return 0 if ! $has_posix_locales;
return 0 if ! locales_enabled('LC_CTYPE');
my $locale = shift;
my $locales_ref = shift;
if (! defined $locales_ref) {
- eval { require POSIX; import POSIX 'locale_h'; };
- return if ! defined &POSIX::LC_CTYPE;
+ return if ! $has_posix_locales;
my @locales = find_locales(&POSIX::LC_CTYPE(),
1 # Reject iffy locales.
use warnings;
-plan( tests => 273 );
+plan(tests => 276 );
# type coercion on assignment
$foo = 'foo';
is $z, 3, 'list assignment after aliasing [perl #89646]';
}
+# RT #125840: make sure *x = $x doesn't do bad things by freeing $x before
+# it's assigned.
+
+{
+ $a_125840 = 1;
+ $b_125840 = 2;
+ $a_125840 = *b_125840;
+ *a_125840 = $a_125840;
+ is($a_125840, 2, 'RT #125840: *a = $a');
+
+ $c_125840 = 1;
+ $d_125840 = 2;
+ *d_125840 = $d_125840 = *c_125840;
+ is($d_125840, 1, 'RT #125840: *d=$d=*c');
+ $c_125840 = $d_125840;
+ is($c_125840, 1, 'RT #125840: $c=$d');
+}
+
__END__
Perl
use Config;
-plan(tests => 79);
+plan(tests => 97);
# Test hexfloat literals.
eval '0x1.fffffffffffffp+1024';
like(get_warn(), qr/^Hexadecimal float: exponent overflow/);
+
+ undef $a;
+ eval '$a = 0x111.0000000000000p+0'; # 12 zeros.
+ like(get_warn(), qr/^Hexadecimal float: mantissa overflow/);
+ is($a, 273);
+
+ # The 13 zeros would be enough to push the hi-order digits
+ # off the high-end.
+
+ undef $a;
+ eval '$a = 0x111.0000000000000p+0'; # 13 zeros.
+ like(get_warn(), qr/^Hexadecimal float: mantissa overflow/);
+ is($a, 273);
+
+ undef $a;
+ eval '$a = 0x111.00000000000000p+0'; # 14 zeros.
+ like(get_warn(), qr/^Hexadecimal float: mantissa overflow/);
+ is($a, 273);
+
+ undef $a;
+ eval '$a = 0xfffffffffffffp0'; # 52 bits.
+ is(get_warn(), undef);
+ is($a, 4.5035996273705e+15);
+
+ undef $a;
+ eval '$a = 0xfffffffffffff.8p0'; # 53 bits.
+ is(get_warn(), undef);
+ is($a, 4.5035996273705e+15);
+
+ undef $a;
+ eval '$a = 0xfffffffffffff.cp0'; # 54 bits.
+ like(get_warn(), qr/^Hexadecimal float: mantissa overflow/);
+ is($a, 4.5035996273705e+15);
+
+ undef $a;
+ eval '$a = 0xf.ffffffffffffp0'; # 52 bits.
+ is(get_warn(), undef);
+ is($a, 16);
+
+ undef $a;
+ eval '$a = 0xf.ffffffffffff8p0'; # 53 bits.
+ is(get_warn(), undef);
+ is($a, 16);
+
+ undef $a;
+ eval '$a = 0xf.ffffffffffffcp0'; # 54 bits.
+ like(get_warn(), qr/^Hexadecimal float: mantissa overflow/);
+ is($a, 16);
} else {
print "# skipping warning tests\n";
- skip "nv_preserves_uv_bits is $Config{nv_preserves_uv_bits} not 53", 8;
+ skip "nv_preserves_uv_bits is $Config{nv_preserves_uv_bits} not 53", 26;
}
}
skip('We can\'t test blocking without sigprocmask', 17)
if is_miniperl() || !$Config{d_sigprocmask};
skip("This doesn\'t work on $^O threaded builds RT#88814", 17)
- if ($^O =~ /cygwin/ || $^O eq "openbsd" && $Config{osvers} < 5.2)
- && $Config{useithreads};
+ if ($^O =~ /cygwin/ && $Config{useithreads});
+ skip("This doesn\'t work on $^O version $Config{osvers} RT#88814", 17)
+ if ($^O eq "openbsd" && $Config{osvers} < 5.2);
require POSIX;
my $pending = POSIX::SigSet->new();
>%y< >''< >%y INVALID REDUNDANT<
>%z< >''< >%z INVALID REDUNDANT<
>%2$d %1$d< >[12, 34]< >34 12<
->%*2$d< >[12, 3]< > 12 REDUNDANT<
+>%*2$d< >[12, 3]< > 12< >RT#125469<
+>%*3$d< >[12, 9, 3]< > 12< >related to RT#125469<
>%2$d %d< >[12, 34]< >34 12<
>%2$d %d %d< >[12, 34]< >34 12 34<
>%3$d %d %d< >[12, 34, 56]< >56 12 34<
>%2$*3$d %d< >[12, 34, 3]< > 34 12<
->%*3$2$d %d< >[12, 34, 3]< >%*3$2$d 12 INVALID REDUNDANT<
+>%*3$2$d %d< >[12, 34, 3]< >%*3$2$d 12 INVALID<
>%2$d< >12< >0 MISSING<
>%0$d< >12< >%0$d INVALID REDUNDANT<
>%1$$d< >12< >%1$$d INVALID<
>%1$1$d< >12< >%1$1$d INVALID<
->%*2$*2$d< >[12, 3]< >%*2$*2$d INVALID REDUNDANT<
+>%*2$*2$d< >[12, 3]< >%*2$*2$d INVALID<
>%*2*2$d< >[12, 3]< >%*2*2$d INVALID REDUNDANT<
->%*2$1d< >[12, 3]< >%*2$1d INVALID REDUNDANT<
+>%*2$1d< >[12, 3]< >%*2$1d INVALID<
>%0v2.2d< >''< ><
>%vc,%d< >[63, 64, 65]< >%vc,63 INVALID REDUNDANT<
>%v%,%d< >[63, 64, 65]< >%v%,63 INVALID REDUNDANT<
[ '% 20.10a', '3.14', ' 0x1.91eb851eb8p+1' ],
[ '%020.10a', '3.14', '0x0001.91eb851eb8p+1' ],
+ [ '%.13a', '1', '0x1.0000000000000p+0' ],
+ [ '%.13a', '-1', '-0x1.0000000000000p+0' ],
+ [ '%.13a', '0', '0x0.0000000000000p+0' ],
+
[ '%30a', '3.14', ' 0x1.91eb851eb851fp+1' ],
[ '%-30a', '3.14', '0x1.91eb851eb851fp+1 ' ],
[ '%030a', '3.14', '0x00000000001.91eb851eb851fp+1' ],
print "# no hexfloat tests\n";
}
-plan tests => 1408 + ($Q ? 0 : 12) + @hexfloat;
+plan tests => 1408 + ($Q ? 0 : 12) + @hexfloat + 9;
use strict;
use Config;
is $o::numcount, 1, 'sprintf %d number overload count is 1';
my $ppc64_linux = $Config{archname} =~ /^ppc64-linux/;
+my $irix_ld = $Config{archname} =~ /^IP\d+-irix-ld$/;
for my $t (@hexfloat) {
my ($format, $arg, $expected) = @$t;
ok($ok, "'$format' '$arg' -> '$result' cf '$expected'");
next;
}
+ if ($doubledouble && $irix_ld && $arg =~ /^1.41421/) {
+ # irix has buggy sqrt(2),
+ # last hexdigit one bit error:
+ # gets '0x1.6a09e667f3bcc908b2fb1366eacp+0'
+ # wants '0x1.6a09e667f3bcc908b2fb1366ea8p+0'
+ local $::TODO = "$Config{archname} sqrt(2)";
+ ok($ok, "'$format' '$arg' -> '$result' cf '$expected'");
+ next;
+ }
unless ($ok) {
# It seems that there can be difference in the last bits:
# [perl #122578]
}
ok($ok, "'$format' '$arg' -> '$result' cf '$expected'");
}
+
+# double-double long double %a special testing.
+SKIP: {
+ skip("uselongdouble=" . ($Config{uselongdouble} ? 'define' : 'undef')
+ . " longdblkind=$Config{longdblkind} os=$^O", 6)
+ unless ($Config{uselongdouble} &&
+ ($Config{longdblkind} == 5 ||
+ $Config{longdblkind} == 6)
+ # TODO: gating on 'linux' here is only due to lack of
+ # testing in other big-endian platforms (e.g. AIX or IRIX),
+ # with more evidence this subtest could be either relaxed
+ # or removed.
+ && $^O eq 'linux'
+ );
+ # [rt.perl.org 125633]
+ like(sprintf("%La\n", (2**1020) + (2**-1072)),
+ qr/^0x1.0{522}1p\+1020$/);
+ like(sprintf("%La\n", (2**1021) + (2**-1072)),
+ qr/^0x1.0{523}8p\+1021$/);
+ like(sprintf("%La\n", (2**1022) + (2**-1072)),
+ qr/^0x1.0{523}4p\+1022$/);
+ like(sprintf("%La\n", (2**1023) + (2**-1072)),
+ qr/^0x1.0{523}2p\+1023$/);
+ like(sprintf("%La\n", (2**1023) + (2**-1073)),
+ qr/^0x1.0{523}1p\+1023$/);
+ like(sprintf("%La\n", (2**1023) + (2**-1074)),
+ qr/^0x1.0{524}8p\+1023$/);
+}
+
+SKIP: {
+ skip("negative zero not available\n", 3)
+ unless sprintf('%+f', -0.0) =~ /^-0/;
+ is(sprintf("%a", -0.0), "-0x0p+0", "negative zero");
+ is(sprintf("%+a", -0.0), "-0x0p+0", "negative zero");
+ is(sprintf("%.13a", -0.0), "-0x0.0000000000000p+0", "negative zero");
+}
# burning tons of CPU for dates far in the future.
# watchdog() makes sure that the test script eventually exits if
# the tests are triggering the failing behavior
-watchdog(15);
+watchdog(25);
($beguser,$begsys) = times;
while (($now = time) == $beg) { sleep 1 }
ok($now > $beg && $now - $beg < 10, 'very basic time test');
-
+my $x = "aaaa";
for ($i = 0; $i < 1_000_000; $i++) {
- for my $j (1..100) {}; # burn some user cycles
+ for my $j (1..1000) { ++$x; }; # burn some user cycles
($nowuser, $nowsys) = times;
$i = 2_000_000 if $nowuser > $beguser && ( $nowsys >= $begsys ||
(!$nowsys && !$begsys));
+CPAN cpan/CPAN/lib/CPAN.pm ce62c43d72f101c011184dbbc59e21c2790826f0
ExtUtils::MakeMaker cpan/ExtUtils-MakeMaker/lib/ExtUtils/Command/MM.pm 7f4dfd0fe884bd42412bcf04ca80ef97b39c1d54
ExtUtils::MakeMaker cpan/ExtUtils-MakeMaker/lib/ExtUtils/Liblist.pm bef099988b15fb0b2a1f5ac48c01af1f7f36d329
ExtUtils::MakeMaker cpan/ExtUtils-MakeMaker/lib/ExtUtils/Liblist/Kid.pm 8168e18f0e3ce3ece4bb7e7c72d57ec07c67c402
pod/perlwin32.pod Verbatim line length including indents exceeds 79 by 12
porting/epigraphs.pod Verbatim line length including indents exceeds 79 by 16
porting/expand-macro.pl Verbatim line length including indents exceeds 79 by 2
-porting/release_managers_guide.pod Verbatim line length including indents exceeds 79 by 7
+porting/release_managers_guide.pod Verbatim line length including indents exceeds 79 by 1
porting/todo.pod Verbatim line length including indents exceeds 79 by 7
utils/c2ph Verbatim line length including indents exceeds 79 by 44
utils/encguess Apparent broken link 1
skip_all_without_unicode_tables();
}
-plan tests => 774; # Update this when adding/deleting tests.
+plan tests => 775; # Update this when adding/deleting tests.
run_tests() unless caller;
"test that we handle things like m/\\888888888/ without infinite loops" );
}
+ { # Test that we handle some malformed UTF-8 without looping [perl
+ # #123562]
+
+ my $code='
+ BEGIN{require q(test.pl);}
+ use Encode qw(_utf8_on);
+ my $malformed = "a\x80\n";
+ _utf8_on($malformed);
+ watchdog(3);
+ $malformed =~ /(\n\r|\r)$/;
+ print q(No infinite loop here!);
+ ';
+ fresh_perl_like($code, qr/Malformed UTF-8 character/, {},
+ "test that we handle some UTF-8 malformations without looping" );
+ }
+
{
# [perl #123843] hits SEGV trying to compile this pattern
my $match;
\By\b xy y - -
\by\B yz y - -
\By\B xyz y - -
+\b n - -
+\b{gcb} n - -
+\b{sb} n - -
+\b{wb} n - -
\B y - -
+\B{gcb} y - -
+\B{sb} y - -
+\B{wb} y - -
\w a y - -
\w - n - -
\W a n - -
/w\zxy?\z/i \x{100}a\x{80}a n - -
/w\z\R\z/i \x{100}a\x{80}a n - -
+/(a+){1}+a/ aaa n - - # [perl #125825]
+
+(?i - c - Sequence (?... not terminated
+(?a-x - c - Sequence (?... not terminated
+.{1}?? - c - Nested quantifiers
+.{1}?+ - c - Nested quantifiers
+
# Keep these lines at the end of the file
# vim: softtabstop=0 noexpandtab
'/(?[ \x{} ])/' => 'Number with no digits {#} m/(?[ \x{}{#} ])/',
'/(?[ \cK + ) ])/' => 'Unexpected \')\' {#} m/(?[ \cK + ){#} ])/',
'/(?[ \cK + ])/' => 'Incomplete expression within \'(?[ ])\' {#} m/(?[ \cK + {#}])/',
+ '/(?[ ( ) ])/' => 'Incomplete expression within \'(?[ ])\' {#} m/(?[ ( ) {#}])/',
+ '/(?[[0]+()+])/' => 'Incomplete expression within \'(?[ ])\' {#} m/(?[[0]+()+{#}])/',
'/(?[ \p{foo} ])/' => 'Property \'foo\' is unknown {#} m/(?[ \p{foo}{#} ])/',
'/(?[ \p{ foo = bar } ])/' => 'Property \'foo = bar\' is unknown {#} m/(?[ \p{ foo = bar }{#} ])/',
'/(?[ \8 ])/' => 'Unrecognized escape \8 in character class {#} m/(?[ \8{#} ])/',
'm/\cß/' => "Character following \"\\c\" must be printable ASCII",
'/((?# This is a comment in the middle of a token)?:foo)/' => 'In \'(?...)\', the \'(\' and \'?\' must be adjacent {#} m/((?# This is a comment in the middle of a token)?{#}:foo)/',
'/((?# This is a comment in the middle of a token)*FAIL)/' => 'In \'(*VERB...)\', the \'(\' and \'*\' must be adjacent {#} m/((?# This is a comment in the middle of a token)*{#}FAIL)/',
+ '/(?[\ &!])/' => 'Incomplete expression within \'(?[ ])\' {#} m/(?[\ &!{#}])/', # [perl #126180]
+ '/(?[!()])/' => 'Incomplete expression within \'(?[ ])\' {#} m/(?[!(){#}])/', # [perl #126404]
);
# These are messages that are warnings when not strict; death under 'use re
'Useless (?c) - use /gc modifier {#} m/(?ogc{#})\x{100}/',
],
'/a{1,1}?\x{100}/' => 'Useless use of greediness modifier \'?\' {#} m/a{1,1}?{#}\x{100}/',
- '/b{3} +\x{100}/x' => 'Useless use of greediness modifier \'+\' {#} m/b{3} +{#}\x{100}/',
"/(?[ [ % - % ] ])/" => "",
"/(?[ [ : - \\x$colon_hex ] ])\\x{100}/" => "\": - \\x$colon_hex \" is more clearly written simply as \":\" {#} m/(?[ [ : - \\x$colon_hex {#}] ])\\x{100}/",
"/(?[ [ \\x$colon_hex - : ] ])\\x{100}/" => "\"\\x$colon_hex\ - : \" is more clearly written simply as \":\" {#} m/(?[ [ \\x$colon_hex - : {#}] ])\\x{100}/",
eval 'my $x = qr/(?[ [a] ])/; qr/(?[ $x ])/';
is($@, "", 'qr/(?[ [a] ])/ can be interpolated');
+like("B", qr/(?[ [B] | ! ( [^B] ) ])/, "[perl #125892]");
+
+# RT #126181: \cX behaves strangely inside (?[])
+{
+ no warnings qw(syntax regexp);
+
+ eval { $_ = '/(?[(\c]) /'; qr/$_/ };
+ like($@, qr/^Syntax error/, '/(?[(\c]) / should not panic');
+ eval { $_ = '(?[\c#]' . "\n])"; qr/$_/ };
+ like($@, qr/^Syntax error/, '/(?[(\c]) / should not panic');
+ eval { $_ = '(?[(\c])'; qr/$_/ };
+ like($@, qr/^Syntax error/, '/(?[(\c])/ should be a syntax error');
+ eval { $_ = '(?[(\c]) ]\b'; qr/$_/ };
+ like($@, qr/^Syntax error/, '/(?[(\c]) ]\b/ should be a syntax error');
+ eval { $_ = '(?[\c[]](])'; qr/$_/ };
+ like($@, qr/^Syntax error/, '/(?[\c[]](])/ should be a syntax error');
+ like("\c#", qr/(?[\c#])/, '\c# should match itself');
+ like("\c[", qr/(?[\c[])/, '\c[ should match itself');
+ like("\c\ ", qr/(?[\c\])/, '\c\ should match itself');
+ like("\c]", qr/(?[\c]])/, '\c] should match itself');
+}
+
+# RT #126481 !! with syntax error panics
+{
+ fresh_perl_like('no warnings "experimental::regex_sets"; qr/(?[ ! ! (\w])/',
+ qr/^Unmatched \(/, {},
+ 'qr/(?[ ! ! (\w])/ doesnt panic');
+ # The following didn't panic before, but easy to add this here with a
+ # paren between the !!
+ fresh_perl_like('no warnings "experimental::regex_sets";qr/(?[ ! ( ! (\w)])/',
+ qr/^Unmatched \(/, {},
+ 'qr/qr/(?[ ! ( ! (\w)])/');
+}
+
done_testing();
1;
require './charset_tools.pl';
}
-plan( tests => 261 );
+plan( tests => 267 );
$_ = 'david';
$a = s/david/rules/r;
is("$division$division$division" =~ s/\B/!/ugr, "!$division!$division!$division!", '\\B matches Latin1 before string, mid, and end, /u');
is("\x{2028}\x{2028}\x{2028}" =~ s/\B/!/ugr, "!\x{2028}!\x{2028}!\x{2028}!", '\\B matches above-Latin1 before string, mid, and end, /u');
+ fresh_perl_like( '$_=""; /\b{gcb}/; s///g', qr/^$/, {},
+ '[perl #126319: Segmentation fault in Perl_sv_catpvn_flags with \b{gcb}'
+ );
+ fresh_perl_like( '$_=""; /\B{gcb}/; s///g', qr/^$/, {},
+ '[perl #126319: Segmentation fault in Perl_sv_catpvn_flags with \b{gcb}'
+ );
+ fresh_perl_like( '$_=""; /\b{wb}/; s///g', qr/^$/, {},
+ '[perl #126319: Segmentation fault in Perl_sv_catpvn_flags with \b{wb}'
+ );
+ fresh_perl_like( '$_=""; /\B{wb}/; s///g', qr/^$/, {},
+ '[perl #126319: Segmentation fault in Perl_sv_catpvn_flags with \b{wb}'
+ );
+ fresh_perl_like( '$_=""; /\b{sb}/; s///g', qr/^$/, {},
+ '[perl #126319: Segmentation fault in Perl_sv_catpvn_flags with \b{sb}'
+ );
+ fresh_perl_like( '$_=""; /\B{sb}/; s///g', qr/^$/, {},
+ '[perl #126319: Segmentation fault in Perl_sv_catpvn_flags with \b{sb}'
+ );
+
SKIP: {
eval { require POSIX; POSIX->import("locale_h"); };
if ($@ || !eval { &POSIX::LC_ALL; 1 }) {
skip_all_if_miniperl('-C and $ENV{PERL_UNICODE} are disabled on miniperl');
}
-plan(tests => 13);
+plan(tests => 14);
my $r;
stderr => 1 );
like( $r, qr/^$b(?:\r?\n)?$/s, '-CO: no warning on UTF-8 output' );
+$r = runperl( switches => [ '-C2', '-w' ],
+ prog => 'print chr(256)',
+ stderr => 1 );
+like( $r, qr/^$b(?:\r?\n)?$/s, '-C2: no warning on UTF-8 output' );
+
SKIP: {
if (exists $ENV{PERL_UNICODE} &&
($ENV{PERL_UNICODE} eq "" || $ENV{PERL_UNICODE} =~ /[SO]/)) {
case '`':
s = scan_str(s,FALSE,FALSE,FALSE,NULL);
- DEBUG_T( { printbuf("### Saw backtick string before %s\n", s); } );
+ DEBUG_T( {
+ if (s)
+ printbuf("### Saw backtick string before %s\n", s);
+ else
+ PerlIO_printf(Perl_debug_log,
+ "### Saw unterminated backtick string\n");
+ } );
if (PL_expect == XOPERATOR)
no_op("Backticks",s);
if (!s)
if (*s == ':' && s[1] != ':')
PL_expect = attrful;
- else if ((*s != '{' && *s != '(') && key == KEY_sub) {
+ else if ((*s != '{' && *s != '(') && key != KEY_format) {
+ assert(key == KEY_sub || key == KEY_AUTOLOAD ||
+ key == KEY_DESTROY || key == KEY_BEGIN ||
+ key == KEY_UNITCHECK || key == KEY_CHECK ||
+ key == KEY_INIT || key == KEY_END ||
+ key == KEY_my || key == KEY_state ||
+ key == KEY_our);
if (!have_name)
Perl_croak(aTHX_ "Illegal declaration of anonymous subroutine");
else if (*s != ';' && *s != '}')
#ifdef HEXFP_NV
NV mult = 1 / 16.0;
#endif
- h++;
- while (isXDIGIT(*h) || *h == '_') {
+ for (h++; (isXDIGIT(*h) || *h == '_'); h++) {
if (isXDIGIT(*h)) {
U8 b = XDIGIT_VALUE(*h);
total_bits += shift;
+ if (total_bits < NV_MANT_DIG) {
+#ifdef HEXFP_UQUAD
+ hexfp_uquad <<= shift;
+ hexfp_uquad |= b;
+ hexfp_frac_bits += shift;
+#else /* HEXFP_NV */
+ hexfp_nv += b * mult;
+ mult /= 16.0;
+#endif
+ } else if (total_bits - shift < NV_MANT_DIG) {
+ /* A hexdigit straddling the edge of
+ * mantissa. We can try grabbing as
+ * many as possible bits. */
+ int shift2 = 0;
+ if (b & 1) {
+ shift2 = 4;
+ } else if (b & 2) {
+ shift2 = 3;
+ total_bits--;
+ } else if (b & 4) {
+ shift2 = 2;
+ total_bits -= 2;
+ } else if (b & 8) {
+ shift2 = 1;
+ total_bits -= 3;
+ }
#ifdef HEXFP_UQUAD
- hexfp_uquad <<= shift;
- hexfp_uquad |= b;
- hexfp_frac_bits += shift;
+ hexfp_uquad <<= shift2;
+ hexfp_uquad |= b;
+ hexfp_frac_bits += shift2;
#else /* HEXFP_NV */
- hexfp_nv += b * mult;
- mult /= 16.0;
+ hexfp_nv += b * mult;
+ mult /= 16.0;
#endif
+ }
}
- h++;
}
}
hexfp_exp *= 10;
hexfp_exp += *h - '0';
#ifdef NV_MIN_EXP
- if (negexp &&
- -hexfp_exp < NV_MIN_EXP - 1) {
+ if (negexp
+ && -hexfp_exp < NV_MIN_EXP - 1) {
Perl_ck_warner(aTHX_ packWARN(WARN_OVERFLOW),
"Hexadecimal float: exponent underflow");
-#endif
break;
}
- else {
+#endif
#ifdef NV_MAX_EXP
- if (!negexp &&
- hexfp_exp > NV_MAX_EXP - 1) {
- Perl_ck_warner(aTHX_ packWARN(WARN_OVERFLOW),
+ if (!negexp
+ && hexfp_exp > NV_MAX_EXP - 1) {
+ Perl_ck_warner(aTHX_ packWARN(WARN_OVERFLOW),
"Hexadecimal float: exponent overflow");
- break;
- }
-#endif
+ break;
}
+#endif
}
h++;
}
{
dVAR;
PERL_ARGS_ASSERT_VWARNER;
- if (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) {
+ if (
+ (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) &&
+ !(PL_in_eval & EVAL_KEEPERR)
+ ) {
SV * const msv = vmess(pat, args);
if (PL_parser && PL_parser->error_count) {
if (isDIGIT(*p)) {
const char* endptr;
UV uv;
- if (grok_atoUV(p, &uv, &endptr)
- && uv <= U32_MAX
- && (p = endptr)
- && *p && *p != '\n' && *p != '\r'
- ) {
+ if (grok_atoUV(p, &uv, &endptr) && uv <= U32_MAX) {
opt = (U32)uv;
- if (isSPACE(*p))
- goto the_end_of_the_opts_parser;
- else
- Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
+ p = endptr;
+ if (p && *p && *p != '\n' && *p != '\r') {
+ if (isSPACE(*p))
+ goto the_end_of_the_opts_parser;
+ else
+ Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
+ }
}
}
else {
extra.pods : miniperl
@ @extra_pods.com
-PERLDELTA_CURRENT = [.pod]perl5220delta.pod
+PERLDELTA_CURRENT = [.pod]perl5221delta.pod
$(PERLDELTA_CURRENT) : [.pod]perldelta.pod
Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT)
# versioned installation can be obtained by setting INST_TOP above to a
# path that includes an arbitrary version string.
#
-#INST_VER = \5.22.0
+#INST_VER = \5.22.1
#
# Comment this out if you DON'T want your perl installation to have
copy ..\README.tw ..\pod\perltw.pod
copy ..\README.vos ..\pod\perlvos.pod
copy ..\README.win32 ..\pod\perlwin32.pod
- copy ..\pod\perldelta.pod ..\pod\perl5220delta.pod
+ copy ..\pod\perldelta.pod ..\pod\perl5221delta.pod
cd ..\win32
$(PERLEXE) $(PL2BAT) $(UTILS)
$(MINIPERL) -I..\lib ..\autodoc.pl ..
-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
-cd $(PODDIR) && del /f *.html *.bat roffitall \
- perl5220delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+ perl5221delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
perlapi.pod perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \
perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
$opt{uvxformat} = '"lx"';
}
+unless ($opt{cc} =~ /\bcl/) {
+ if ($opt{WIN64} eq 'define') {
+ $opt{longdblsize} = 16;
+ $opt{longdblinfbytes} = '0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00';
+ $opt{longdblnanbytes} = '0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00';
+ }
+ else {
+ $opt{longdblsize} = 12;
+ $opt{longdblinfbytes} = '0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0x7f, 0x00, 0x00';
+ $opt{longdblnanbytes} = '0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0xff, 0x00, 0x00';
+ }
+}
+
# set long double options
if ($opt{uselongdouble} eq 'define') {
$opt{d_Gconvert} = 'sprintf((b),"%.*""Lg",(n),(x))';
$opt{d_PRIfldbl} = 'define';
$opt{d_PRIgldbl} = 'define';
$opt{d_SCNfldbl} = 'define';
- if ($opt{WIN64} eq 'define') {
- $opt{longdblsize} = 16;
- $opt{nvsize} = 16;
- }
- else {
- $opt{longdblsize} = 12;
- $opt{nvsize} = 12;
- }
+ $opt{nvsize} = $opt{longdblsize};
$opt{nvtype} = 'long double';
$opt{nv_overflows_integers_at} = '256.0*256.0*256.0*256.0*256.0*256.0*256.0*2.0*2.0*2.0*2.0*2.0*2.0*2.0*2.0';
$opt{nvEUformat} = '"LE"';
$opt{nveformat} = '"Le"';
$opt{nvfformat} = '"Lf"';
$opt{nvgformat} = '"Lg"';
+ $opt{longdblkind} = 3;
+ $opt{longdblmantbits} = 64;
}
else {
$opt{d_Gconvert} = 'sprintf((b),"%.*g",(n),(x))';
$opt{d_PRIfldbl} = 'undef';
$opt{d_PRIgldbl} = 'undef';
$opt{d_SCNfldbl} = 'undef';
- $opt{longdblsize} = 8;
$opt{nvsize} = 8;
$opt{nvtype} = 'double';
$opt{nv_overflows_integers_at} = '256.0*256.0*256.0*256.0*256.0*256.0*2.0*2.0*2.0*2.0*2.0';
# versioned installation can be obtained by setting INST_TOP above to a
# path that includes an arbitrary version string.
#
-#INST_VER *= \5.22.0
+#INST_VER *= \5.22.1
#
# Comment this out if you DON'T want your perl installation to have
copy ..\README.tw ..\pod\perltw.pod
copy ..\README.vos ..\pod\perlvos.pod
copy ..\README.win32 ..\pod\perlwin32.pod
- copy ..\pod\perldelta.pod ..\pod\perl5220delta.pod
+ copy ..\pod\perldelta.pod ..\pod\perl5221delta.pod
$(PERLEXE) $(PL2BAT) $(UTILS)
$(MINIPERL) -I..\lib ..\autodoc.pl ..
$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
-cd $(PODDIR) && del /f *.html *.bat roffitall \
- perl5220delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+ perl5221delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
perlapi.pod perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \
perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*" />
</dependentAssembly>
</dependency>
+ <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+ <application>
+ <!-- The ID below indicates application support for Windows Vista -->
+ <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
+ <!-- The ID below indicates application support for Windows 7 -->
+ <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+ <!-- The ID below indicates application support for Windows 8 -->
+ <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+ <!-- The ID below indicates application support for Windows 8.1 -->
+ <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+ <!-- The ID below indicates application support for Windows 10 -->
+ <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+ </application>
+ </compatibility>
</assembly>
perl5200delta.pod \
perl5201delta.pod \
perl5202delta.pod \
- perl5210delta.pod \
- perl52110delta.pod \
- perl52111delta.pod \
- perl5211delta.pod \
- perl5212delta.pod \
- perl5213delta.pod \
- perl5214delta.pod \
- perl5215delta.pod \
- perl5216delta.pod \
- perl5217delta.pod \
- perl5218delta.pod \
- perl5219delta.pod \
+ perl5203delta.pod \
perl5220delta.pod \
+ perl5221delta.pod \
perl561delta.pod \
perl56delta.pod \
perl581delta.pod \
perl5200delta.man \
perl5201delta.man \
perl5202delta.man \
- perl5210delta.man \
- perl52110delta.man \
- perl52111delta.man \
- perl5211delta.man \
- perl5212delta.man \
- perl5213delta.man \
- perl5214delta.man \
- perl5215delta.man \
- perl5216delta.man \
- perl5217delta.man \
- perl5218delta.man \
- perl5219delta.man \
+ perl5203delta.man \
perl5220delta.man \
+ perl5221delta.man \
perl561delta.man \
perl56delta.man \
perl581delta.man \
perl5200delta.html \
perl5201delta.html \
perl5202delta.html \
- perl5210delta.html \
- perl52110delta.html \
- perl52111delta.html \
- perl5211delta.html \
- perl5212delta.html \
- perl5213delta.html \
- perl5214delta.html \
- perl5215delta.html \
- perl5216delta.html \
- perl5217delta.html \
- perl5218delta.html \
- perl5219delta.html \
+ perl5203delta.html \
perl5220delta.html \
+ perl5221delta.html \
perl561delta.html \
perl56delta.html \
perl581delta.html \
perl5200delta.tex \
perl5201delta.tex \
perl5202delta.tex \
- perl5210delta.tex \
- perl52110delta.tex \
- perl52111delta.tex \
- perl5211delta.tex \
- perl5212delta.tex \
- perl5213delta.tex \
- perl5214delta.tex \
- perl5215delta.tex \
- perl5216delta.tex \
- perl5217delta.tex \
- perl5218delta.tex \
- perl5219delta.tex \
+ perl5203delta.tex \
perl5220delta.tex \
+ perl5221delta.tex \
perl561delta.tex \
perl56delta.tex \
perl581delta.tex \
projects / platform / upstream / perl.git / commitdiff