perldiag: Add entry for unknown charname

diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index 27fb232..0f98ee8 100644 (file)
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -5062,6 +5062,16 @@ off this warning by C<no warnings 'surrogate';>.
 (F) There are no byte-swapping functions for a machine with this byte
 order.
 
+=item Unknown charname '%s'
+
+(F) The name you used inside C<\N{}> is unknown to Perl.  Check the
+spelling.  You can say C<use charnames ":loose"> to not have to be
+so precise about spaces, hyphens, and capitalization on standard Unicode
+names.  (Any custom aliases that have been created must be specified
+exactly, regardless of whether C<:loose> is used or not.)  This error may
+also happen if the C<\N{}> is not in the scope of the corresponding
+C<S<use charnames>>.
+
 =item Unknown error
 
 (P) Perl was about to print an error message in C<$@>, but the C<$@> variable