perldelta - what is new for perl v5.41.11
This document describes differences between the 5.41.10 release and the 5.41.11 release.
If you are upgrading from an earlier release such as 5.41.9, first read perl54110delta, which describes differences between 5.41.9 and 5.41.10.
Perl now supports Unicode 16.0 https://www.unicode.org/versions/Unicode16.0.0/ including the changes introduced in 15.1 https://www.unicode.org/versions/Unicode15.1.0/.
A heap buffer overflow vulnerability was discovered in Perl.
When there are non-ASCII bytes in the left-hand-side of the tr operator, S_do_trans_invmap() can overflow the destination pointer d.
$ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'
Segmentation fault (core dumped)It is believed that this vulnerability can enable Denial of Service or Arbitrary Code Execution attacks on platforms that lack sufficient defenses.
Discovered by: Nathan Mills.
Data::Dumper has been upgraded from version 2.191 to 2.192.
ExtUtils::MakeMaker has been upgraded from version 7.72 to 7.74.
Fcntl has been upgraded from version 1.19 to 1.20.
File::Spec has been upgraded from version 3.92 to 3.94.
Math::BigInt has been upgraded from version 2.004001 to 2.005002.
Math::BigInt::FastCalc has been upgraded from version 0.5019 to 0.5020.
Module::CoreList has been upgraded from version 5.20250321 to 5.20250420.
Pod::Usage has been upgraded from version 2.03 to 2.05.
Storable has been upgraded from version 3.36 to 3.37.
Test::Simple has been upgraded from version 1.302209 to 1.302210.
Time::HiRes has been upgraded from version 1.9777 to 1.9778.
Time::Piece has been upgraded from version 1.35 to 1.36.
Unicode::UCD has been upgraded from version 0.79 to 0.80.
XS::APItest has been upgraded from version 1.41 to 1.42.
This fixes [GH #16654].
Normalized alignment of verbatim sections, fixing how they are displayed by some Pod viewers that strip indentation.
We have attempted to update the documentation to reflect the changes listed in this document. If you find any we have missed, open an issue at https://github.com/Perl/perl5/issues.
Additionally, the following selected changes have been made:
Additional caveats have been added to the description of TARG.
Collation of strings using locales on MacOS 15 (Darwin 24) and up has been turned off due to a failed assertion in its libc.
In some cases an eval would not add integer parts to the source lines saved by the debugger. [GH #23151]
Save debugger lines as PVIV SVs rather than as PVMG SVs as they don't need magic, aren't blessed and don't need to store a floating point part. This should save 24 bytes per stored line for 64-bit systems, more for -Duselongdouble or -Dusequadmath builds. Discussed in [GH #23171].
Ensure cloning the save stack for fork emulation doesn't duplicate freeing the RExC state. [GH #23022]
Smartmatch against a code reference that uses a loop exit such as last would crash perl. [GH #16608]
Class initializers and ADJUST blocks, per perlclass, that called last or other loop exits would crash perl. Same cause as for [GH #16608].
Prevent a signature parameter of the form $ = from leaking an OP at compile-time. [GH #23187]
Perl 5.41.11 represents approximately 4 weeks of development since Perl 5.41.10 and contains approximately 250,000 lines of changes across 460 files from 22 authors.
Excluding auto-generated files, documentation and release tools, there were approximately 39,000 lines of changes to 320 .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 5.41.11:
Chad Granum, Chris 'BinGOs' Williams, Dan Book, Daniel Dragan, Graham Knop, James E Keenan, Karen Etheridge, Karl Williamson, Leon Timmermans, Lukas Mai, Marek Rouchal, Paul Evans, Peter Eisentraut, Peter John Acklam, Philippe Bruhat (BooK), Richard Leach, Steve Hay, TAKAI Kousuke, Thibault Duponchelle, Tony Cook, Unicode Consortium, Vladimír Marek.
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.