Commit 38c51497ea for perl
commit 38c51497eae6753ea9d1b11c55d1f9fa59a56d26
Author: Philippe Bruhat (BooK) <book@cpan.org>
Date: Wed Sep 23 18:28:40 2026 +0200
perldelta edits for 5.45.2
Co-authored-by: Eric Herman <eric@freesa.org>
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 45e5f1f75a..4069b971fa 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,9 +2,6 @@
=head1 NAME
-[ 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 v5.45.3
=head1 DESCRIPTION
@@ -15,18 +12,8 @@ release.
If you are upgrading from an earlier release such as 5.45.1, first read
L<perl5452delta>, which describes differences between 5.45.1 and 5.45.2.
-=head1 Notice
-
-XXX Any important notices here
-
=head1 Core Enhancements
-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.
-
-[ List each enhancement as a =head2 entry ]
-
=head2 Undef-aware equality operators
Four new operators have been added, which are similar to the regular equality operators except for their handling of C<undef>. Whereas the regular operators treat C<undef> as equal to the empty string or the number zero, these operators consider C<undef> to be a distinct value, equal to itself, but unequal to any defined value.
@@ -65,64 +52,8 @@ highlighting it here as well because it increases the portability
possibilities of your locale-aware code on multi-threaded builds of
perl.
-=head1 Security
-
-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.
-
-[ List each security issue as a =head2 entry ]
-
-=head1 Incompatible Changes
-
-XXX For a release on a stable branch, this section aspires to be:
-
- 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.
-
-[ List each incompatible change as a =head2 entry ]
-
-=head1 Deprecations
-
-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 *
@@ -172,11 +103,7 @@ Specifically, any of the following single subscripts
=back
-[GH #23369]
-
-=item *
-
-XXX
+[L<GH #23369|https://github.com/Perl/perl5/issues/23369>]
=item *
@@ -190,169 +117,70 @@ and UTF-8 strings.
=head1 Modules and Pragmata
-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.
-
-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.)
-
-[ Within each section, list entries as an =item entry ]
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-XXX Remove this section if F<Porting/corelist-perldelta.pl> did not add any content here.
-
-=back
-
=head2 Updated Modules and Pragmata
=over 4
=item *
-L<XXX> has been upgraded from version A.xx to B.yy.
-
-XXX If there was something important to note about this change, include that here.
-
-=back
-
-=head2 Removed Modules and Pragmata
-
-=over 4
+L<B::Deparse> has been upgraded from version 1.90 to 1.92.
=item *
-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
+L<Compress::Raw::Bzip2> has been upgraded from version 2.218 to 2.224.
=item *
-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
+L<Compress::Raw::Zlib> has been upgraded from version 2.222 to 2.224.
=item *
-XXX L<message|perldiag/"message">
+L<CPAN::Meta> has been upgraded from version 2.150013 to 2.150015.
-=back
-
-=head3 New Warnings
+=item *
-=over 4
+L<Devel::PPPort> has been upgraded from version 3.73 to 3.74.
=item *
-XXX L<message|perldiag/"message">
+L<IO::Compress> has been upgraded from version 2.223 to 2.224.
-=back
+=item *
-=head2 Changes to Existing Diagnostics
+L<Module::CoreList> has been upgraded from version 5.20260722 to 5.20260924.
-XXX Changes (i.e. rewording) of diagnostic messages go here
+=item *
-=over 4
+L<Opcode> has been upgraded from version 1.72 to 1.73.
=item *
-XXX Describe change here
+L<overload> has been upgraded from version 1.40 to 1.42.
-=back
+=item *
-=head1 Utility Changes
+L<podlators> has been upgraded from version v6.1.0 to v6.1.1.
-XXX Changes to installed programs such as F<perldoc> and F<xsubpp> go here.
-Most of these are built within the directory F<utils>.
+=item *
-[ 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. ]
+L<Test::Simple> has been upgraded from version 1.302222 to 1.302225.
-=head2 F<XXX>
+=item *
-=over 4
+L<threads> has been upgraded from version 2.46 to 2.47.
=item *
-XXX
+L<warnings> has been upgraded from version 1.78 to 1.79.
=back
=head1 Configuration and Compilation
-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 *
-XXX
-
-=item *
-
The default hash algorithm is now SipHash-1-3 on all platforms. It used to be
Zaphod32 on 32-bit perls built without support for 64-bit integers. If you want
to keep using Zaphod32, configure perl with:
@@ -361,96 +189,20 @@ to keep using Zaphod32, configure perl with:
=back
-=head1 Testing
-
-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.
-
-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:
-
-[ List each test improvement as an =item entry ]
-
-=over 4
-
-=item *
-
-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.
+=head2 Platform-Specific Notes
=over 4
-=item XXX-some-platform
-
-XXX
-
=item MacOS (Darwin)
Add support for building with Command Line Tools for Xcode 27.0
=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 XXX-some-platform
-
-XXX
-
-=back
-
=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 *
@@ -497,10 +249,6 @@ See L<perllocale/Multi-threaded operation>.
=item *
-XXX
-
-=item *
-
The regular expression compiler's TRIE implementation has been changed to use
the octets of the UTF-8 representation of the pattern in its internal table
structures. Previous versions used a trie based on code points, which had
@@ -516,14 +264,6 @@ improvement.
=head1 Selected Bug Fixes
-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>.
-
-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.
-
-[ List each fix as an =item entry ]
-
=over 4
=item *
@@ -553,26 +293,32 @@ string value and returning 9.
=back
-[GH #24763]
+[L<GH #24763|https://github.com/Perl/perl5/issues/24763>]
=item *
builtin::reftype() and builtin::refaddr() now call set magic for their
output when their argument isn't a reference. This would prevent
propagation of the result if either function was called like
-C<$magical_lexical = reftype($maybe_ref)>. [GH #24634]
+C<$magical_lexical = reftype($maybe_ref)>.
+
+[L<GH #24634|https://github.com/Perl/perl5/issues/24634>]
=item *
Parsing an invalid signature that gives a slurpy parameter a default value no
-longer crashes when parser debugging is enabled. [GH #24691]
+longer crashes when parser debugging is enabled.
+
+[L<GH #24691|https://github.com/Perl/perl5/issues/24691>]
=item *
Copy magic to the new elements when splice() inserts elements into a
non-tied magical array. In particular, assignment to an element of an
C<@ISA> array where the element was added by splice() is now correctly
-recognized when performing method lookup. [GH #24659]
+recognized when performing method lookup.
+
+[L<GH #24659|https://github.com/Perl/perl5/issues/24659>]
=item *
@@ -589,7 +335,7 @@ need it. (That was a workaround to improve the accuracy of line number
reporting for the first statement in the block, which should no longer
be necessary.)
-[GH #23867]
+[L<GH #23867|https://github.com/Perl/perl5/issues/23867>]
=item *
@@ -600,47 +346,41 @@ subroutine return.) In this situation, the C<stub> OP must be retained
so that C<&PL_sv_undef> can be pushed onto the stack, which will be
needed if the call site has scalar context.
-[GH #23867]
+[L<GH #23867|https://github.com/Perl/perl5/issues/23867>]
=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 *
-
-XXX
-
-=back
-
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
+=head1 Acknowledgements
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the F<perldelta> of a previous release.
+Perl 5.45.3 represents approximately 5 weeks of development since Perl
+5.45.2 and contains approximately 230,000 lines of changes across 610 files
+from 25 authors.
-=back
+Excluding auto-generated files, documentation and release tools, there were
+approximately 41,000 lines of changes to 400 .pm, .t, .c and .h files.
-=head1 Obituary
+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 5.45.3:
-XXX If any significant core contributor or member of the CPAN community has
-died, add a short obituary here.
+Branislav Zahradník, Chad Granum, David Mitchell, Dina Tagantseva, James E
+Keenan, Karen Etheridge, Karl Williamson, Leon Timmermans, Lukas Mai, Nick
+Johnston, Paul Evans, Paul Marquess, Philippe Bruhat (BooK), Richard Leach,
+Russ Allbery, Scott Baker, Sevan Janiyan, Shlomi Fish, Sisyphus, TAKAI
+Kousuke, Tomasz Konojacki, Tony Cook, Unicode Consortium, Yudai Takada, Yves
+Orton.
-=head1 Acknowledgements
+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.
-XXX Generate this with:
+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.
- perl Porting/acknowledgements.pl v5.45.2..HEAD
+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