=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 v5.37.6
=head1 DESCRIPTION
If you are upgrading from an earlier release such as 5.37.4, first read
L<perl5375delta>, which describes differences between 5.37.4 and 5.37.5.
-=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 ]
-
-=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 ]
-
=head2 L<C<utf8::upgrade()>|utf8/Utility functions>
Starting in this release, if the input string is C<undef>, it remains
C<undef>. Previously it would be changed into a defined, zero-length
string.
-=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 *
-
-XXX
-
-=back
-
=head1 Modules and Pragmata
-XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
-go here. If 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
to return true explicitly, and in fact the return will be forced to
a simple true value regardless of what it originally was.
-=item *
-
-XXX Remove this section if not applicable.
-
=back
=head2 Updated Modules and Pragmata
=back
-=head2 Removed Modules and Pragmata
-
-=over 4
-
-=item *
-
-XXX
-
-=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 *
-
-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 New Errors
-and New Warnings
-
=head3 New Errors
-=over 4
-
-=item *
-
-XXX L<message|perldiag/"message">
-
-=back
+None
=head3 New Warnings
-=over 4
-
-=item *
-
-XXX L<message|perldiag/"message">
-
-=back
+None
=head2 Changes to Existing Diagnostics
-XXX Changes (i.e. rewording) of diagnostic messages go here
-
=over 4
=item *
as a result such warnings will no longer trigger C<$SIG{__WARN__}>
twice, and the hint will be visible when fatal warnings is in effect.
-=item *
-
-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>.
+=head2 Configure
-[ List utility changes as a =head2 entry for each utility and =item
-entries for each change
-Use L<XXX> with program names to get proper documentation linking. ]
+None
-=head2 L<XXX>
+=head1 Configuration and Compilation
=over 4
used to be defined in F<perl.h> using preprocessor conditionals.
They are now determined in F<Configure> and defined in F<config.h>.
-=item *
-
-XXX
-
=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 ].
+=head1 Testing
=over 4
=item *
-XXX
-
-=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.
-
=over 4
=item Windows
point instead of the C<SubstituteName>, which should make it better
match the name the link was created with. [github #20271]
-=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 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 *
expect a C<SSize_t> parameter, and enforce that on debugging builds.
[github #20411]
-=back
+=item *
-=head1 Selected Bug Fixes
+Filenames in cops are now refcounted under threads.
+Under threads we were copying the filenames into each opcode. This is because in
+theory opcodes created in one thread can be destroyed in another.
+The change adds a new struct/type RCPV, which is a refcounted
+string using shared memory. This is implemented in such a way that code
+that previously used a char * can continue to do so, as the refcounting
+data is located a specific offset before the char * pointer itself.
-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>.
+[commit 6760f691a95ab3a37fd59212795de2b1a7cf7888]
+
+=back
-[ List each fix as an =item entry ]
+-=head1 Selected Bug Fixes
=over 4
=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
+None
=head1 Errata From Previous Releases
-=over 4
+None
-=item *
+=head1 Acknowledgements
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the perldelta of a previous release.
+Perl 5.37.6 represents approximately 4 weeks of development since Perl
+5.37.5 and contains approximately 16,000 lines of changes across 230 files
+from 26 authors.
-=back
+Excluding auto-generated files, documentation and release tools, there were
+approximately 12,000 lines of changes to 130 .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 5.37.6:
-XXX If any significant core contributor or member of the CPAN community has
-died, add a short obituary here.
+Alexander Nikolov, Andreas König, Aristotle Pagaltzis, Bram, Branislav
+Zahradník, chromatic, David Mitchell, E. Choroba, Elvin Aslanov, Felipe
+Gasper, Graham Knop, James E Keenan, Joe McMahon, Johan Vromans, Karl
+Williamson, Leon Timmermans, Mattia Barbon, Max Maischein, Paul Evans,
+Ricardo Signes, Richard Leach, TAKAI Kousuke, Todd Rinaldo, Tom Stellard,
+Tony Cook, 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 v5.37.5..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
https://perl5.git.perl.org / perl5.git / commitdiff