--- /dev/null
+=encoding utf8
+
+=head1 NAME
+
+perl54111delta - what is new for perl v5.41.11
+
+=head1 DESCRIPTION
+
+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
+L<perl54110delta>, which describes differences between 5.41.9 and 5.41.10.
+
+=head1 Core Enhancements
+
+=head2 Unicode 16.0 supported
+
+Perl now supports Unicode 16.0
+L<https://www.unicode.org/versions/Unicode16.0.0/> including the changes
+introduced in 15.1 L<https://www.unicode.org/versions/Unicode15.1.0/>.
+
+=head1 Security
+
+=head2 [CVE-2024-56406] Heap buffer overflow vulnerability with tr//
+
+A heap buffer overflow vulnerability was discovered in Perl.
+
+When there are non-ASCII bytes in the left-hand-side of the C<tr> operator,
+C<S_do_trans_invmap()> can overflow the destination pointer C<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.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<Data::Dumper> has been upgraded from version 2.191 to 2.192.
+
+=item *
+
+L<ExtUtils::MakeMaker> has been upgraded from version 7.72 to 7.74.
+
+=item *
+
+L<Fcntl> has been upgraded from version 1.19 to 1.20.
+
+=item *
+
+L<File::Spec> has been upgraded from version 3.92 to 3.94.
+
+=item *
+
+L<Math::BigInt> has been upgraded from version 2.004001 to 2.005002.
+
+=item *
+
+L<Math::BigInt::FastCalc> has been upgraded from version 0.5019 to 0.5020.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20250321 to 5.20250420.
+
+=item *
+
+L<Pod::Usage> has been upgraded from version 2.03 to 2.05.
+
+=item *
+
+L<Storable> has been upgraded from version 3.36 to 3.37.
+
+=item *
+
+L<Test::Simple> has been upgraded from version 1.302209 to 1.302210.
+
+=item *
+
+L<Time::HiRes> has been upgraded from version 1.9777 to 1.9778.
+
+=item *
+
+L<Time::Piece> has been upgraded from version 1.35 to 1.36.
+
+=item *
+
+L<Unicode::UCD> has been upgraded from version 0.79 to 0.80.
+
+=item *
+
+L<XS::APItest> has been upgraded from version 1.41 to 1.42.
+
+This fixes [L<GH #16654|https://github.com/Perl/perl5/issues/16654>].
+
+=back
+
+=head1 Documentation
+
+=head2 perlop
+
+=over 4
+
+=item *
+
+Normalized alignment of verbatim sections, fixing how they are displayed by
+some Pod viewers that strip indentation.
+
+=back
+
+=head2 Changes to Existing Documentation
+
+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 L<https://github.com/Perl/perl5/issues>.
+
+Additionally, the following selected changes have been made:
+
+=head3 L<perlguts>
+
+=over 4
+
+=item *
+
+Additional caveats have been added to the description of C<TARG>.
+
+=back
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item MacOS (Darwin)
+
+Collation of strings using locales on MacOS 15 (Darwin 24) and up has
+been turned off due to a failed assertion in its libc.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+In some cases an C<eval> would not add integer parts to the source
+lines saved by the debugger. [L<GH #23151|https://github.com/Perl/perl5/issues/23151>]
+
+=item *
+
+Save debugger lines as C<PVIV> SVs rather than as C<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 C<-Duselongdouble> or C<-Dusequadmath> builds.
+Discussed in [L<GH #23171|https://github.com/Perl/perl5/issues/23171>].
+
+=item *
+
+Ensure cloning the save stack for fork emulation doesn't duplicate
+freeing the RExC state. [L<GH #23022|https://github.com/Perl/perl5/issues/23022>]
+
+=item *
+
+Smartmatch against a code reference that uses a loop exit such as
+C<last> would crash perl. [L<GH #16608|https://github.com/Perl/perl5/issues/16608>]
+
+=item *
+
+Class initializers and C<ADJUST> blocks, per L<perlclass>, that
+called C<last> or other loop exits would crash perl. Same cause as
+for [L<GH #16608|https://github.com/Perl/perl5/issues/16608>].
+
+=item *
+
+Prevent a signature parameter of the form C<$ => from leaking an OP at
+compile-time. [L<GH #23187|https://github.com/Perl/perl5/issues/23187>]
+
+=back
+
+=head1 Acknowledgements
+
+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 F<AUTHORS> file in the Perl source distribution.
+
+=head1 Reporting Bugs
+
+If you find what you think is a bug, you might check the perl bug database
+at L<https://github.com/Perl/perl5/issues>. There may also be information at
+L<https://www.perl.org/>, the Perl Home Page.
+
+If you believe you have an unreported bug, please open an issue at
+L<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
+L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
+for details of how to report the issue.
+
+=head1 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 C<perlthanks> program:
+
+ perlthanks
+
+This will send an email to the Perl 5 Porters list with your show of thanks.
+
+=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
=head1 NAME
-perldelta - what is new for perl v5.41.11
+[ this is a template for a new perldelta file. Any text flagged as XXX needs
+to be processed before release. ]
+
+perldelta - what is new for perl v5.41.12
=head1 DESCRIPTION
-This document describes differences between the 5.41.10 release and the 5.41.11
+This document describes differences between the 5.41.11 release and the 5.41.12
release.
-If you are upgrading from an earlier release such as 5.41.9, first read
-L<perl54110delta>, which describes differences between 5.41.9 and 5.41.10.
+If you are upgrading from an earlier release such as 5.41.10, first read
+L<perl54111delta>, which describes differences between 5.41.10 and 5.41.11.
+
+=head1 Notice
+
+XXX Any important notices here
=head1 Core Enhancements
-=head2 Unicode 16.0 supported
+XXX New core language features go here. Summarize user-visible core language
+enhancements. Particularly prominent performance optimisations could go
+here, but most should go in the L</Performance Enhancements> section.
-Perl now supports Unicode 16.0
-L<https://www.unicode.org/versions/Unicode16.0.0/> including the changes
-introduced in 15.1 L<https://www.unicode.org/versions/Unicode15.1.0/>.
+[ List each enhancement as a =head2 entry ]
=head1 Security
-=head2 [CVE-2024-56406] Heap buffer overflow vulnerability with tr//
+XXX Any security-related notices go here. In particular, any security
+vulnerabilities closed should be noted here rather than in the
+L</Selected Bug Fixes> section.
-A heap buffer overflow vulnerability was discovered in Perl.
+[ List each security issue as a =head2 entry ]
-When there are non-ASCII bytes in the left-hand-side of the C<tr> operator,
-C<S_do_trans_invmap()> can overflow the destination pointer C<d>.
+=head1 Incompatible Changes
- $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'
- Segmentation fault (core dumped)
+XXX For a release on a stable branch, this section aspires to be:
-It is believed that this vulnerability can enable Denial of Service or
-Arbitrary Code Execution attacks on platforms that lack sufficient defenses.
+ There are no changes intentionally incompatible with 5.XXX.XXX
+ If any exist, they are bugs, and we request that you submit a
+ report. See L</Reporting Bugs> below.
-Discovered by: Nathan Mills.
+[ List each incompatible change as a =head2 entry ]
-=head1 Modules and Pragmata
+=head1 Deprecations
-=head2 Updated Modules and Pragmata
+XXX Any deprecated features, syntax, modules etc. should be listed here.
+
+=head2 Module removals
+
+XXX Remove this section if not applicable.
+
+The following modules will be removed from the core distribution in a
+future release, and will at that time need to be installed from CPAN.
+Distributions on CPAN which require these modules will need to list them as
+prerequisites.
+
+The core versions of these modules will now issue C<deprecated>-category
+warnings to alert you to this fact. To silence these deprecation warnings,
+install the modules in question from CPAN.
+
+Note that these are (with rare exceptions) fine modules that you are encouraged
+to continue to use. Their disinclusion from core primarily hinges on their
+necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
+not usually on concerns over their design.
+
+=over
+
+=item XXX
+
+XXX Note that deprecated modules should be listed here even if they are listed
+as an updated module in the L</Modules and Pragmata> section.
+
+=back
+
+[ List each other deprecation as a =head2 entry ]
+
+=head1 Performance Enhancements
+
+XXX Changes which enhance performance without changing behaviour go here.
+There may well be none in a stable release.
+
+[ List each enhancement as an =item entry ]
=over 4
=item *
-L<Data::Dumper> has been upgraded from version 2.191 to 2.192.
+XXX
-=item *
+=back
-L<ExtUtils::MakeMaker> has been upgraded from version 7.72 to 7.74.
+=head1 Modules and Pragmata
-=item *
+XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
+go here. If L<Module::CoreList> is updated, generate an initial draft of the
+following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
+for important changes should then be added by hand. In an ideal world,
+dual-life modules would have a F<Changes> file that could be cribbed.
-L<Fcntl> has been upgraded from version 1.19 to 1.20.
+The list of new and updated modules is modified automatically as part of
+preparing a Perl release, so the only reason to manually add entries here is if
+you're summarising the important changes in the module update. (Also, if the
+manually-added details don't match the automatically-generated ones, the
+release manager will have to investigate the situation carefully.)
-=item *
+[ Within each section, list entries as an =item entry ]
+
+=head2 New Modules and Pragmata
-L<File::Spec> has been upgraded from version 3.92 to 3.94.
+=over 4
=item *
-L<Math::BigInt> has been upgraded from version 2.004001 to 2.005002.
+XXX Remove this section if F<Porting/corelist-perldelta.pl> did not add any content here.
-=item *
+=back
+
+=head2 Updated Modules and Pragmata
-L<Math::BigInt::FastCalc> has been upgraded from version 0.5019 to 0.5020.
+=over 4
=item *
-L<Module::CoreList> has been upgraded from version 5.20250321 to 5.20250420.
+L<XXX> has been upgraded from version A.xx to B.yy.
-=item *
+XXX If there was something important to note about this change, include that here.
-L<Pod::Usage> has been upgraded from version 2.03 to 2.05.
+=back
-=item *
+=head2 Removed Modules and Pragmata
-L<Storable> has been upgraded from version 3.36 to 3.37.
+=over 4
=item *
-L<Test::Simple> has been upgraded from version 1.302209 to 1.302210.
+XXX Remove this section if F<Porting/corelist-perldelta.pl> did not add any content here.
+
+=back
+
+=head1 Documentation
+
+XXX Changes to files in F<pod/> go here. Consider grouping entries by
+file and be sure to link to the appropriate page, e.g. L<perlfunc>.
+
+=head2 New Documentation
+
+XXX Changes which create B<new> files in F<pod/> go here.
+
+=head3 L<XXX>
+
+XXX Description of the purpose of the new file here
+
+=head2 Changes to Existing Documentation
+
+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 L<https://github.com/Perl/perl5/issues>.
+
+XXX Changes which significantly change existing files in F<pod/> go here.
+However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
+section.
+
+Additionally, the following selected changes have been made:
+
+=head3 L<XXX>
+
+=over 4
=item *
-L<Time::HiRes> has been upgraded from version 1.9777 to 1.9778.
+XXX Description of the change here
+
+=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>.
+
+XXX New or changed warnings emitted by the core's C<C> code go here. Also
+include any changes in L<perldiag> that reconcile it to the C<C> code.
+
+=head2 New Diagnostics
+
+XXX Newly added diagnostic messages go under here, separated into L</New Errors>
+and L</New Warnings>
+
+=head3 New Errors
+
+=over 4
=item *
-L<Time::Piece> has been upgraded from version 1.35 to 1.36.
+XXX L<message|perldiag/"message">
+
+=back
+
+=head3 New Warnings
+
+=over 4
=item *
-L<Unicode::UCD> has been upgraded from version 0.79 to 0.80.
+XXX L<message|perldiag/"message">
+
+=back
+
+=head2 Changes to Existing Diagnostics
+
+XXX Changes (i.e. rewording) of diagnostic messages go here
+
+=over 4
=item *
-L<XS::APItest> has been upgraded from version 1.41 to 1.42.
+XXX Describe change here
+
+=back
+
+=head1 Utility Changes
+
+XXX Changes to installed programs such as F<perldoc> and F<xsubpp> go here.
+Most of these are built within the directory F<utils>.
+
+[ List utility changes as a =head2 entry for each utility and =item
+entries for each change
+Use F<XXX> with program names to get proper documentation linking. ]
-This fixes [L<GH #16654|https://github.com/Perl/perl5/issues/16654>].
+=head2 F<XXX>
+
+=over 4
+
+=item *
+
+XXX
=back
-=head1 Documentation
+=head1 Configuration and Compilation
-=head2 perlop
+XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
+go here. Any other changes to the Perl build process should be listed here.
+However, any platform-specific changes should be listed in the
+L</Platform Support> section, instead.
+
+[ List changes as an =item entry ].
=over 4
=item *
-Normalized alignment of verbatim sections, fixing how they are displayed by
-some Pod viewers that strip indentation.
+XXX
=back
-=head2 Changes to Existing Documentation
+=head1 Testing
-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 L<https://github.com/Perl/perl5/issues>.
+XXX Any significant changes to the testing of a freshly built perl should be
+listed here. Changes which create B<new> files in F<t/> go here as do any
+large changes to the testing harness (e.g. when parallel testing was added).
+Changes to existing files in F<t/> aren't worth summarizing, although the bugs
+that they represent may be covered elsewhere.
-Additionally, the following selected changes have been made:
+XXX If there were no significant test changes, say this:
+
+Tests were added and changed to reflect the other additions and changes
+in this release.
+
+XXX If instead there were significant changes, say this:
+
+Tests were added and changed to reflect the other additions and
+changes in this release. Furthermore, these significant changes were
+made:
-=head3 L<perlguts>
+[ List each test improvement as an =item entry ]
=over 4
=item *
-Additional caveats have been added to the description of C<TARG>.
+XXX
+
+=back
+
+=head1 Platform Support
+
+XXX Any changes to platform support should be listed in the sections below.
+
+[ Within the sections, list each platform as an =item entry with specific
+changes as paragraphs below it. ]
+
+=head2 New Platforms
+
+XXX List any platforms that this version of perl compiles on, that previous
+versions did not. These will either be enabled by new files in the F<hints/>
+directories, or new subdirectories and F<README> files at the top level of the
+source tree.
+
+=over 4
+
+=item XXX-some-platform
+
+XXX
+
+=back
+
+=head2 Discontinued Platforms
+
+XXX List any platforms that this version of perl no longer compiles on.
+
+=over 4
+
+=item XXX-some-platform
+
+XXX
=back
=head2 Platform-Specific Notes
+XXX List any changes for specific platforms. This could include configuration
+and compilation changes or changes in portability/compatibility. However,
+changes within modules for platforms should generally be listed in the
+L</Modules and Pragmata> section.
+
=over 4
-=item MacOS (Darwin)
+=item XXX-some-platform
-Collation of strings using locales on MacOS 15 (Darwin 24) and up has
-been turned off due to a failed assertion in its libc.
+XXX
=back
-=head1 Selected Bug Fixes
+=head1 Internal Changes
+
+XXX Changes which affect the interface available to C<XS> code go here. Other
+significant internal changes for future core maintainers should be noted as
+well.
+
+[ List each change as an =item entry ]
=over 4
=item *
-In some cases an C<eval> would not add integer parts to the source
-lines saved by the debugger. [L<GH #23151|https://github.com/Perl/perl5/issues/23151>]
+XXX
-=item *
+=back
-Save debugger lines as C<PVIV> SVs rather than as C<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 C<-Duselongdouble> or C<-Dusequadmath> builds.
-Discussed in [L<GH #23171|https://github.com/Perl/perl5/issues/23171>].
+=head1 Selected Bug Fixes
-=item *
+XXX Important bug fixes in the core language are summarized here. Bug fixes in
+files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
-Ensure cloning the save stack for fork emulation doesn't duplicate
-freeing the RExC state. [L<GH #23022|https://github.com/Perl/perl5/issues/23022>]
+XXX Include references to GitHub issues and PRs as: [GH #12345] and the release
+manager will later use a regex to expand these into links.
-=item *
+[ List each fix as an =item entry ]
-Smartmatch against a code reference that uses a loop exit such as
-C<last> would crash perl. [L<GH #16608|https://github.com/Perl/perl5/issues/16608>]
+=over 4
=item *
-Class initializers and C<ADJUST> blocks, per L<perlclass>, that
-called C<last> or other loop exits would crash perl. Same cause as
-for [L<GH #16608|https://github.com/Perl/perl5/issues/16608>].
+XXX
+
+=back
+
+=head1 Known Problems
+
+XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
+tests that had to be C<TODO>ed for the release would be noted here. Unfixed
+platform specific bugs also go here.
+
+[ List each fix as an =item entry ]
+
+=over 4
=item *
-Prevent a signature parameter of the form C<$ => from leaking an OP at
-compile-time. [L<GH #23187|https://github.com/Perl/perl5/issues/23187>]
+XXX
=back
-=head1 Acknowledgements
+=head1 Errata From Previous Releases
+
+=over 4
-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.
+=item *
+
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the F<perldelta> of a previous release.
-Excluding auto-generated files, documentation and release tools, there were
-approximately 39,000 lines of changes to 320 .pm, .t, .c and .h files.
+=back
-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:
+=head1 Obituary
-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.
+XXX If any significant core contributor or member of the CPAN community has
+died, add a short obituary here.
-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.
+=head1 Acknowledgements
-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.
+XXX Generate this with:
-For a more complete list of all of Perl's historical contributors, please
-see the F<AUTHORS> file in the Perl source distribution.
+ perl Porting/acknowledgements.pl v5.41.11..HEAD
=head1 Reporting Bugs
https://perl5.git.perl.org / perl5.git / commitdiff