--- /dev/null
+=encoding utf8
+
+=head1 NAME
+
+perl5197delta - what is new for perl v5.19.7
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.19.6 release and the 5.19.7
+release.
+
+If you are upgrading from an earlier release such as 5.19.5, first read
+L<perl5196delta>, which describes differences between 5.19.5 and 5.19.6.
+
+=head1 Core Enhancements
+
+=head2 Postfix syntax for maximum array index
+
+The postfix notation C<< ->$#* >> has been added, to match the similar
+postfix operators added in 5.19.5. C<< $foo->$#* >> is equivalent to
+C<$#$foo>. See L<perlref>.
+
+=head1 Incompatible Changes
+
+=head2 Data::Dumper's output may change
+
+Depending on the data structures dumped and the settings set for
+Data::Dumper, the dumped output may have changed from previous
+versions.
+
+If you have tests that depend on the exact output of Data::Dumper,
+they may fail.
+
+To avoid this problem in your code, test against the data structure
+from evaluating the dumped structure, instead of the dump itself.
+
+=head1 Deprecations
+
+=head2 C<< CGI.pm >>
+
+The C<< CGI.pm >> module has been deprecated since version 3.64.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<base> has been upgraded from version 2.19 to 2.20.
+
+C<base> now only ignores load failure on the requested module. [perl
+#120685]
+
+=item *
+
+L<CGI> has been upgraded from version 3.63 to 3.64.
+
+Avoids a warning about "undefined variable in user_agent" in some cases, and
+updates L<CGI::Cookie> documentation to reflect that "HttpOnly" is widely
+supported.
+
+NOTE: L<CGI> is deprecated and may be removed from a future version of Perl.
+
+=item *
+
+L<constant> has been upgraded from version 1.29 to 1.30.
+
+=item *
+
+L<CPAN::Meta> has been upgraded from version 2.132830 to 2.133380.
+
+=item *
+
+L<Data::Dumper> has been upgraded from version 2.149 to 2.150.
+
+Regular expression objects are now dumped in a form closer to their
+original source, eg. C< qr/abc/i > is dumped as exactly that instead of
+C< qr/(?^i:abc)/ >. [perl #82948]
+
+Dumping of hash keys is now more consistent between the XS and perl
+implementations of L<Data::Dumper>, including how the C<quotekeys>
+option behaves. This may make tests that depend on the exact output
+of Data::Dumper to fail. [perl #120384]
+
+=item *
+
+L<DynaLoader> has been upgraded from version 1.21 to 1.22.
+
+=item *
+
+L<ExtUtils::MakeMaker> has been upgraded from version 6.82 to 6.84.
+
+=item *
+
+L<File::Fetch> has been upgraded from version 0.44 to 0.46.
+
+Blacklists "ftp" on DragonflyBSD.
+
+=item *
+
+L<HTTP::Tiny> has been upgraded from version 0.038 to 0.039.
+
+=item *
+
+L<inc::latest> has been upgraded from version 0.4202 to 0.4203.
+NOTE: L<inc::latest> is deprecated and may be removed from a future version of Perl.
+
+=item *
+
+L<Locale::Codes> has been upgraded from version 3.27 to 3.28.
+
+=item *
+
+L<Module::Build> has been upgraded from version 0.4202 to 0.4203.
+NOTE: L<Module::Build> is deprecated and may be removed from a future version of Perl.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 3.01 to 3.02.
+
+=item *
+
+L<PerlIO::encoding> has been upgraded from version 0.16 to 0.17.
+
+=item *
+
+L<PerlIO::via> has been upgraded from version 0.13 to 0.14.
+
+=item *
+
+L<POSIX> has been upgraded from version 1.36 to 1.37.
+
+=item *
+
+L<SDBM_File> has been upgraded from 1.10 to 1.11.
+
+Added access to SDBM constants and to opening SDBM files with explicit
+page and directory file names. [perl #114350]
+
+=item *
+
+L<Storable> has been upgraded from version 2.47 to 2.48.
+
+=item *
+
+L<threads> has been upgraded from version 1.90 to 1.91.
+
+=item *
+
+L<Time::Piece> has been upgraded from version 1.23 to 1.24.
+
+=item *
+
+L<Unicode::Collate> has been upgraded from version 1.02 to 1.04.
+
+=item *
+
+L<Win32> has been upgraded from version 0.47 to 0.48.
+
+=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<Useless use of greediness modifier|perldiag/"Useless use of greediness modifier '%c' in regex; marked by <-- HERE in m/%s/">
+
+This fixes [Perl #42957].
+
+=back
+
+=head2 Changes to Existing Diagnostics
+
+=over 4
+
+=item *
+
+The error messages for C<my($a?$b$c)> and C<my(do{})> now mention
+"conditional expression" and "do block", respectively, instead of reading
+'Can't declare null operation in "my"'.
+
+=back
+
+=head1 Utility Changes
+
+=head3 C<< Porting/corelist-perldelta.pl >>
+
+=over 4
+
+=item *
+
+Ensure that the latest version of Module::CoreList is used when
+running the script.
+
+=back
+
+=head1 Testing
+
+=over 4
+
+=item *
+
+Various tests in F<t/porting/> are no longer skipped when the perl
+F<.git> directory is outside the perl tree and pointed to by
+C<$GIT_DIR>. [perl #120505]
+
+=back
+
+=head1 Platform Support
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item Windows
+
+Experimental support for building with Intel C++ Compiler has been extended to
+cover the dmake makefile (win32/makefile.mk) as well.
+
+=back
+
+=head1 Internal Changes
+
+=over 4
+
+=item *
+
+The C<sv> argument in L<perlapi/sv_2pv_flags>, L<perlapi/sv_2iv_flags>,
+L<perlapi/sv_2uv_flags>, and L<perlapi/sv_2nv_flags> and their older wrappers
+sv_2pv, sv_2iv, sv_2uv, sv_2nv, is now non-NULL. Passing NULL now will crash.
+When the non-NULL marker was introduced en masse in 5.9.3 the functions
+were marked non-NULL, but since the creation of the SV API in 5.0 alpha 2, if
+NULL was passed, the functions returned 0 or false-type values. The code that
+supports C<sv> argument being non-NULL dates to 5.0 alpha 2 directly, and
+indirectly to Perl 1.0 (pre 5.0 api). The lack of documentation that the
+functions accepted a NULL C<sv> was corrected in 5.11.0 and between 5.11.0
+and 5.19.5 the functions were marked NULLOK. As an optimization the NULLOK code
+has now been removed, and the functions became non-NULL marked again, because
+core getter-type macros never pass NULL to these functions and would crash
+before ever passing NULL.
+
+The only way a NULL C<sv> can be passed to sv_2*v* functions is if XS code
+directly calls sv_2*v*. This is unlikely as XS code uses Sv*V* macros to get
+the underlying value out of the SV. One possible situation which leads to
+a NULL C<sv> being passed to sv_2*v* functions, is if XS code defines its own
+getter type Sv*V* macros, which check for NULL B<before> dereferencing and
+checking the SV's flags through public API Sv*OK* macros or directly using
+private API C<SvFLAGS>, and if C<sv> is NULL, then calling the sv_2*v functions
+with a NULL litteral or passing the C<sv> containing a NULL value.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+C<< semctl(..., SETVAL, ...) >> would set the semaphore to the top
+32-bits of the supplied integer instead of the bottom 32-bits on
+64-bit big-endian systems. [perl #120635]
+
+=item *
+
+A regression since v5.18.0 has been fixed in which C<qr/[[:^ascii:]]/d>
+failed to match any character in the range C<\x80> - C<\xFF> if its
+surrounding character class contained anything else. (That is, the bug
+didn't happen if the C<[:^ascii:]> was the only element of the character
+class.) [perl #120799]
+
+=item *
+
+C<< readdir() >> now only sets C<$!> on error. C<$!> is no longer set
+to C<EBADF> when then terminating C<undef> is read from the directory
+unless the system call sets C<$!>. [perl #118651]
+
+=item *
+
+C<&CORE::glob> no longer causes an intermittent crash due to perl's stack
+getting corrupted. [perl #119993]
+
+=item *
+
+C<open> with layers that load modules (e.g., "<:encoding(utf8)") no longer
+runs the risk of crashing due to stack corruption.
+
+=item *
+
+When a reference to a reference to an overloaded object was returned from
+a regular expression C<(??{...})> code block, an incorrect implicit
+dereference could take place if the inner reference had been returned by
+a code block previously.
+
+=item *
+
+A tied variable returned from C<(??{...})> sees the inner values of match
+variables (i.e., the $1 etc. from any matches inside the block) in its
+FETCH method. This was not the case if a reference to an overloaded object
+was the last thing assigned to the tied variable. Instead, the match
+variables referred to the outer pattern during the FETCH call.
+
+=item *
+
+Perl 5.18 broke autoloading via C<< ->SUPER::foo >> method calls by looking
+up AUTOLOAD from the current package rather than the current package's
+superclass. This has been fixed. [perl #120694]
+
+=item *
+
+A longstanding bug causing C<do {} until CONSTANT>, where the constant
+holds a true value, to read unallocated memory has been resolved. This
+would usually happen after a syntax error. In past versions of Perl it has
+crashed intermittently. [perl #72406]
+
+=item *
+
+Fix HP-UX $! failure. HP-UX strerror() returns an empty string for an
+unknown error code. This caused an assertion to fail under DEBUGGING
+builds. This patch removes the assertion and changes the return into
+a non-empty string indicating the errno is for an unknown error.
+
+=item *
+
+Fix unexpected tainting via regexp using locale. Previously, under certain
+conditions, the use of character classes could cause tainting when it
+shouldn't. Some character classes are locale-dependent, but before this
+patch, sometimes tainting was happening even for character classes that
+don't depend on the locale. [perl #120675]
+
+=item *
+
+Under certain conditions, Perl would throw an error if in an lookbehind
+assertion in a regexp, the assertion referred to a named subpattern,
+complaining the lookbehind was variable when it wasn't. This has been
+fixed. [perl #120600], [perl #120618]. The current fix may be improved
+on in the future.
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.19.7 represents approximately 4 weeks of development since Perl 5.19.6
+and contains approximately 90,000 lines of changes across 390 files from 26
+authors.
+
+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 5.19.7:
+
+Abigail, Abir Viqar, Brian Childs, Brian Fraser, Chris 'BinGOs' Williams, Craig
+A. Berry, Dabrien 'Dabe' Murphy, Daniel Dragan, David Mitchell, Dennis
+Kaarsemaker, Evan Zacks, Father Chrysostomos, François Perrad, Graham Knop,
+James E Keenan, Jess Robinson, Karl Williamson, Kevin Ryde, Martin McGrath,
+Matthew Horsfall, Nicholas Clark, Peter Martini, Ricardo Signes, 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
projects / platform / upstream / perl.git / commitdiff