perldelta - what is new for perl v5.39.9
This document describes differences between the 5.39.8 release and the 5.39.9 release.
If you are upgrading from an earlier release such as 5.39.7, first read perl5398delta, which describes differences between 5.39.7 and 5.39.8.
^^ logical xor operatorPerl has always had three low-precedence logical operators and, or and xor, as well as three high-precedence bitwise versions &, ^ and |. Until this release, while the medium-precedence logical operators of && and || were also present, there was no exclusive-or equivalent. This release of Perl adds the final ^^ operator, completing the set.
$x ^^ $y and say "One of x or y is true, but not both";bytes has been upgraded from version 1.08 to 1.09.
Compress::Raw::Bzip2 has been upgraded from version 2.206 to 2.210.
Compress::Raw::Zlib has been upgraded from version 2.206 to 2.209.
DynaLoader has been upgraded from version 1.55 to 1.56.
Encode has been upgraded from version 3.20 to 3.21.
Fcntl has been upgraded from version 1.16 to 1.17.
IO::Compress has been upgraded from version 2.206 to 2.207.
IO::Zlib has been upgraded from version 1.14 to 1.15.
Module::CoreList has been upgraded from version 5.20240223 to 5.20240320.
re has been upgraded from version 0.45 to 0.47.
Text::Tabs has been upgraded from version 2023.0511 to 2024.001.
Text::Wrap has been upgraded from version 2023.0511 to 2024.001.
Tie::File has been upgraded from version 1.08 to 1.09.
Old compatibility code for perl 5.005 that was no longer functional has been removed.
Time::HiRes has been upgraded from version 1.9776 to 1.9777.
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 perldiag.
Perl version 5.39.7 added a new warning, "Lexical subroutine %s masks previously declared package subroutine". This was later found to be inconsistent with the behaviour of lexical variables, unhelpful in most common cases, and caused many unnecessary warnings to be printed across CPAN modules. This warning has now been removed.
Perl 5.39.9 represents approximately 4 weeks of development since Perl 5.39.8 and contains approximately 15,000 lines of changes across 230 files from 21 authors.
Excluding auto-generated files, documentation and release tools, there were approximately 4,400 lines of changes to 140 .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 5.39.9:
Aristotle Pagaltzis, Chris 'BinGOs' Williams, Dan Kogai, David Mitchell, Elvin Aslanov, Graham Knop, guoguangwu, James E Keenan, James Raspass, Karl Williamson, Leon Timmermans, Lukas Mai, Martijn Lievaart, Paul Evans, Paul Marquess, Renee Baecker, Richard Leach, Sisyphus, Tom Hughes, 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 AUTHORS file in the Perl source distribution.
If you find what you think is a bug, you might check the perl bug database at https://github.com/Perl/perl5/issues. There may also be information at https://www.perl.org/, the Perl Home Page.
If you believe you have an unreported bug, please open an issue at https://github.com/Perl/perl5/issues. Be sure to trim your bug down to a tiny but sufficient test case.
If the bug you are reporting has security implications which make it inappropriate to send to a public issue tracker, then see "SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to report the issue.
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:
perlthanksThis will send an email to the Perl 5 Porters list with your show of thanks.
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.