man > perl5282delta(1)

PERL5282DELTA(1)                  Perl Programmers Reference Guide                  PERL5282DELTA(1)

NAME
       perl5282delta - what is new for perl v5.28.2

DESCRIPTION
       This document describes differences between the 5.28.1 release and the 5.28.2 release.

       If you are upgrading from an earlier release such as 5.28.0, first read perl5281delta, which
       describes differences between 5.28.0 and 5.28.1.

Incompatible Changes
   Any set of digits in the Common script are legal in a script run of another script
       There are several sets of digits in the Common script.  "[0-9]" is the most familiar.  But
       there are also "[\x{FF10}-\x{FF19}]" (FULLWIDTH DIGIT ZERO - FULLWIDTH DIGIT NINE), and
       several sets for use in mathematical notation, such as the MATHEMATICAL DOUBLE-STRUCK DIGITs.
       Any of these sets should be able to appear in script runs of, say, Greek.  But the previous
       design overlooked all but the ASCII digits "[0-9]", so the design was flawed.  This has been
       fixed, so is both a bug fix and an incompatibility.

       All digits in a run still have to come from the same set of ten digits.

       [GH #16704] <https://github.com/Perl/perl5/issues/16704>

Modules and Pragmata
   Updated Modules and Pragmata
       •   Module::CoreList has been upgraded from version 5.20181129_28 to 5.20190419.

       •   PerlIO::scalar has been upgraded from version 0.29 to 0.30.

       •   Storable has been upgraded from version 3.08 to 3.08_01.

Platform Support
   Platform-Specific Notes
       Windows
           The  Windows  Server  2003 SP1 Platform SDK build, with its early x64 compiler and tools,
           was accidentally broken in Perl 5.27.9.  This has now been fixed.

       Mac OS X
           Perl's build and testing process on Mac OS X for "-Duseshrplib" builds is now  compatible
           with Mac OS X System Integrity Protection (SIP).

           SIP   prevents   binaries   in   /bin   (and   a  few  other  places)  being  passed  the
           "DYLD_LIBRARY_PATH"   environment   variable.    For   our   purposes    this    prevents
           "DYLD_LIBRARY_PATH"  from  being  passed to the shell, which prevents that variable being
           passed to the testing or build process, so running "perl" couldn't find libperl.dylib.

           To work  around  that,  the  initial  build  of  the  perl  executable  expects  to  find
           libperl.dylib  in  the  build  directory,  and  the  library path is then adjusted during
           installation to point to the installed library.

           [GH #15057] <https://github.com/Perl/perl5/issues/15057>

Selected Bug Fixes
       •   If an in-place edit is still in progress during global destruction and the  process  exit
           code  (as  stored  in  $?)  is zero, perl will now treat the in-place edit as successful,
           replacing the input file with any output produced.

           This allows code like:

             perl -i -ne 'print "Foo"; last'

           to replace the input file, while code like:

             perl -i -ne 'print "Foo"; die'

           will not.  Partly resolves [perl #133659].

           [GH #16748] <https://github.com/Perl/perl5/issues/16748>

       •   A regression in Perl 5.28 caused the following code to fail

            close(STDIN); open(CHILD, "|wc -l")'

           because the child's stdin would be closed on exec.  This has now been fixed.

       •   "pack "u", "invalid uuencoding"" now properly NUL terminates the zero-length SV produced.

           [GH #16343] <https://github.com/Perl/perl5/issues/16343>

       •   Failing to compile a format now aborts compilation.  Like other errors in sub-parses this
           could leave the parser  in  a  strange  state,  possibly  crashing  perl  if  compilation
           continued.

           [GH #16169] <https://github.com/Perl/perl5/issues/16169>

       •   See "Any set of digits in the Common script are legal in a script run of another script".

Acknowledgements
       Perl  5.28.2  represents approximately 4 months of development since Perl 5.28.1 and contains
       approximately 2,500 lines of changes across 75 files from 13 authors.

       Excluding auto-generated files, documentation and release  tools,  there  were  approximately
       1,200 lines of changes to 29 .pm, .t, .c and .h files.

       Perl  continues to flourish into its fourth decade thanks to a vibrant community of users and
       developers.  The following people are known to have contributed the improvements that  became
       Perl 5.28.2:

       Aaron  Crane, Abigail, Andy Dougherty, David Mitchell, Karen Etheridge, Karl Williamson, Leon
       Timmermans, Nicolas R., Sawyer X, Steve Hay, Tina Müller, Tony Cook, Zak B. Elep.

       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  AUTHORS
       file in the Perl source distribution.

Reporting Bugs
       If  you  find  what  you  think  is  a  bug,  you  might  check  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 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 "perl -V", will be sent off to perlbug AT 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 see "SECURITY VULNERABILITY CONTACT INFORMATION" in
       perlsec for details of how to report the issue.

Give Thanks
       If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so  by
       running the "perlthanks" program:

           perlthanks

       This will send an email to the Perl 5 Porters list with your show of thanks.

SEE ALSO
       The Changes file for an explanation of how to view exhaustive details on what changed.

       The INSTALL file for how to build Perl.

       The README file for general stuff.

       The Artistic and Copying files for copyright information.

perl v5.38.2                                 2026-06-12                             PERL5282DELTA(1)