new perldelta for 5.35.8

4 files changed, 528 insertions, 84 deletions

diff --git a/pod/.gitignore b/pod/.gitignore
index 107beac2fa..86d73cfc1a 100644
--- a/pod/.gitignore
+++ b/pod/.gitignore
@@ -48,7 +48,7 @@
 /roffitall
 
 # generated
-/perl5357delta.pod
+/perl5358delta.pod
 /perlapi.pod
 /perlintern.pod
 /perlmodlib.pod
diff --git a/pod/perl.pod b/pod/perl.pod
index 3e9a0039d1..2681ae9aed 100644
--- a/pod/perl.pod
+++ b/pod/perl.pod
@@ -179,6 +179,7 @@ aux h2ph h2xs perlbug pl2pm pod2html pod2man splain xsubpp
 
     perlhist		Perl history records
     perldelta		Perl changes since previous version
+    perl5357delta	Perl changes in version 5.35.7
     perl5356delta	Perl changes in version 5.35.6
     perl5355delta	Perl changes in version 5.35.5
     perl5354delta	Perl changes in version 5.35.4
diff --git a/pod/perl5357delta.pod b/pod/perl5357delta.pod
new file mode 100644
index 0000000000..a2375d04f4
--- /dev/null
+++ b/pod/perl5357delta.pod
@@ -0,0 +1,229 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5357delta - what is new for perl v5.35.7
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.35.6 release and the 5.35.7
+release.
+
+If you are upgrading from an earlier release such as 5.35.5, first read
+L<perl5356delta>, which describes differences between 5.35.5 and 5.35.6.
+
+
+=head1 Core Enhancements
+
+=head2 builtin Functions
+
+A new core module L<builtin> has been added, which provides documentation for
+new always-present functions that are built into the interpreter.
+
+    say "Reference type of arrays is ", builtin::reftype([]);
+
+It also provides a lexical import mechanism for providing short name versions
+of these functions.
+
+    use builtin 'reftype';
+    say "Reference type of arrays is ", reftype([]);
+
+An initial set of functions exists to provide convenient access to stable
+boolean values, weakening references, and inspecting properties of references.
+
+This builtin function mechanism and the functions it provides are all
+currently B<experimental>.
+
+For more information, see the L<builtin> module.
+
+
+=head1 Modules and Pragmata
+
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<B::Deparse> has been upgraded from version 1.59 to 1.60.
+
+=item *
+
+L<CPAN> has been upgraded from version 2.28 to 2.29.
+This was part of the fixes for
+L<CPAN vulnerabilities related to checksums|http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html>.
+
+=item *
+
+L<ExtUtils::MakeMaker> has been upgraded from version 7.62 to 7.64.
+This has fixes for OS390, documentation fixes, and some minor enhancements.
+
+=item *
+
+L<File::Compare> has been upgraded from version 1.1006 to 1.1007.
+
+=item *
+
+L<File::Copy> has been upgraded from version 2.37 to 2.38.
+
+=item *
+
+L<File::Spec> has been upgraded from version 3.82 to 3.83.
+
+=item *
+
+L<Hash::Util> has been upgraded from version 0.26 to 0.27.
+
+=item *
+
+L<Hash::Util::FieldHash> has been upgraded from version 1.23 to 1.24.
+
+=item *
+
+L<IO> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<JSON::PP> has been upgraded from version 4.06 to 4.07.
+
+=item *
+
+L<Math::BigInt> has been upgraded from version 1.999827 to 1.999828.
+This:
+adds new methods numerator(), denominator(), and fparts();
+includes a bug fix in to_ieee754();
+and fixes some typos.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20211120 to 5.20211220.
+
+=item *
+
+L<Opcode> has been upgraded from version 1.54 to 1.55.
+
+=item *
+
+L<overload> has been upgraded from version 1.33 to 1.34.
+
+=back
+
+
+
+
+=head1 Platform Support
+
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item z/OS
+
+This update enables us to build EBCDIC static/dynamic
+and 31-bit/64-bit addressing mode Perl. The number of
+tests that pass is consistent with the baseline before
+these updates.
+
+These changes also provide the base support to be able to provide
+ASCII static/dynamic and 31-bit/64-bit addressing mode Perl.
+
+=back
+
+
+=head1 Internal Changes
+
+=over 4
+
+=item * A new phase_name() interface provides access to the name
+for each interpreter phase (i.e., PL_phase value).
+
+=item * The changes in v5.35.5 for how memory for hash iterator state was allocated could cause unbounded memory consumption (until process exit). The bug that caused this has been fixed - memory consumption is now stable, and potentially lower than v5.35.4 and earlier.
+
+=for The v5.36.0 perldelta, just drop the paragraph about the bugfix.
+
+=back
+
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+When bareword filehandles are disabled, the parser was interpreting
+any bareword as a filehandle, even when immediatey followed by parens.
+
+This fixes L<#19271|https://github.com/Perl/perl5/issues/19271>
+
+=back
+
+
+=head1 Acknowledgements
+
+Perl 5.35.7 represents approximately 4 weeks of development since Perl
+5.35.6 and contains approximately 21,000 lines of changes across 230 files
+from 18 authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 19,000 lines of changes to 170 .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 5.35.7:
+
+Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Felipe Gasper, Graham
+Knop, Jakub Wilk, James E Keenan, James Raspass, Karl Williamson, Michiel
+Beijen, Mike Fulton, Neil Bowers, Nicholas Clark, Paul Evans, Richard Leach,
+Steve Hay, TAKAI Kousuke, Tomasz Konojacki, Tony Cook.
+
+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<http://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
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 9bc1f8a85c..1bcc078148 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,194 +2,408 @@
 
 =head1 NAME
 
-perldelta - what is new for perl v5.35.7
+[ 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 v5.35.8
 
 =head1 DESCRIPTION
 
-This document describes differences between the 5.35.6 release and the 5.35.7
+This document describes differences between the 5.35.7 release and the 5.35.8
 release.
 
-If you are upgrading from an earlier release such as 5.35.5, first read
-L<perl5356delta>, which describes differences between 5.35.5 and 5.35.6.
+If you are upgrading from an earlier release such as 5.35.6, first read
+L<perl5357delta>, which describes differences between 5.35.6 and 5.35.7.
+
+=head1 Notice
 
+XXX Any important notices here
 
 =head1 Core Enhancements
 
-=head2 builtin Functions
+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.
 
-A new core module L<builtin> has been added, which provides documentation for
-new always-present functions that are built into the interpreter.
+[ List each enhancement as a =head2 entry ]
 
-    say "Reference type of arrays is ", builtin::reftype([]);
+=head1 Security
 
-It also provides a lexical import mechanism for providing short name versions
-of these functions.
+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.
 
-    use builtin 'reftype';
-    say "Reference type of arrays is ", reftype([]);
+[ List each security issue as a =head2 entry ]
 
-An initial set of functions exists to provide convenient access to stable
-boolean values, weakening references, and inspecting properties of references.
+=head1 Incompatible Changes
 
-This builtin function mechanism and the functions it provides are all
-currently B<experimental>.
+XXX For a release on a stable branch, this section aspires to be:
 
-For more information, see the L<builtin> module.
+    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 Modules and Pragmata
+=head1 Deprecations
 
+XXX Any deprecated features, syntax, modules etc. should be listed here.
 
-=head2 Updated Modules and Pragmata
+=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<B::Deparse> has been upgraded from version 1.59 to 1.60.
+XXX
 
-=item *
+=back
 
-L<CPAN> has been upgraded from version 2.28 to 2.29.
-This was part of the fixes for
-L<CPAN vulnerabilities related to checksums|http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html>.
+=head1 Modules and Pragmata
 
-=item *
+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.
 
-L<ExtUtils::MakeMaker> has been upgraded from version 7.62 to 7.64.
-This has fixes for OS390, documentation fixes, and some minor enhancements.
+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 ]
 
-L<File::Compare> has been upgraded from version 1.1006 to 1.1007.
+=head2 New Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<File::Copy> has been upgraded from version 2.37 to 2.38.
+XXX Remove this section if not applicable.
 
-=item *
+=back
 
-L<File::Spec> has been upgraded from version 3.82 to 3.83.
+=head2 Updated Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<Hash::Util> has been upgraded from version 0.26 to 0.27.
+L<XXX> has been upgraded from version A.xx to B.yy.
+
+If there was something important to note about this change, include that here.
+
+=back
+
+=head2 Removed Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<Hash::Util::FieldHash> has been upgraded from version 1.23 to 1.24.
+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 *
 
-L<IO> has been upgraded from version 1.48 to 1.49.
+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 *
 
-L<JSON::PP> has been upgraded from version 4.06 to 4.07.
+XXX L<message|perldiag/"message">
+
+=back
+
+=head3 New Warnings
+
+=over 4
 
 =item *
 
-L<Math::BigInt> has been upgraded from version 1.999827 to 1.999828.
-This:
-adds new methods numerator(), denominator(), and fparts();
-includes a bug fix in to_ieee754();
-and fixes some typos.
+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<Module::CoreList> has been upgraded from version 5.20211120 to 5.20211220.
+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 L<XXX> with program names to get proper documentation linking. ]
+
+=head2 L<XXX>
+
+=over 4
 
 =item *
 
-L<Opcode> has been upgraded from version 1.54 to 1.55.
+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 ].
+
+=over 4
 
 =item *
 
-L<overload> has been upgraded from version 1.33 to 1.34.
+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:
 
-=head1 Platform Support
+Tests were added and changed to reflect the other additions and changes
+in this release.
 
+XXX If instead there were significant changes, say this:
 
-=head2 Platform-Specific Notes
+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 z/OS
+=item *
 
-This update enables us to build EBCDIC static/dynamic
-and 31-bit/64-bit addressing mode Perl. The number of
-tests that pass is consistent with the baseline before
-these updates.
+XXX
+
+=back
+
+=head1 Platform Support
 
-These changes also provide the base support to be able to provide
-ASCII static/dynamic and 31-bit/64-bit addressing mode Perl.
+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
 
-=head1 Internal Changes
+XXX List any platforms that this version of perl no longer compiles on.
 
 =over 4
 
-=item * A new phase_name() interface provides access to the name
-for each interpreter phase (i.e., PL_phase value).
+=item XXX-some-platform
 
-=item * The changes in v5.35.5 for how memory for hash iterator state was allocated could cause unbounded memory consumption (until process exit). The bug that caused this has been fixed - memory consumption is now stable, and potentially lower than v5.35.4 and earlier.
+XXX
 
-=for The v5.36.0 perldelta, just drop the paragraph about the bugfix.
+=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 *
+
+XXX
+
+=back
 
 =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>.
+
+[ List each fix as an =item entry ]
+
 =over 4
 
 =item *
 
-When bareword filehandles are disabled, the parser was interpreting
-any bareword as a filehandle, even when immediatey followed by parens.
+XXX
+
+=back
 
-This fixes L<#19271|https://github.com/Perl/perl5/issues/19271>
+=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
 
-=head1 Acknowledgements
+=over 4
 
-Perl 5.35.7 represents approximately 4 weeks of development since Perl
-5.35.6 and contains approximately 21,000 lines of changes across 230 files
-from 18 authors.
+=item *
 
-Excluding auto-generated files, documentation and release tools, there were
-approximately 19,000 lines of changes to 170 .pm, .t, .c and .h files.
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the perldelta of a previous release.
 
-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 5.35.7:
+=back
 
-Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Felipe Gasper, Graham
-Knop, Jakub Wilk, James E Keenan, James Raspass, Karl Williamson, Michiel
-Beijen, Mike Fulton, Neil Bowers, Nicholas Clark, Paul Evans, Richard Leach,
-Steve Hay, TAKAI Kousuke, Tomasz Konojacki, Tony Cook.
+=head1 Obituary
 
-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 If any significant core contributor or member of the CPAN community has
+died, add a short obituary here.
 
-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.
+=head1 Acknowledgements
 
-For a more complete list of all of Perl's historical contributors, please
-see the F<AUTHORS> file in the Perl source distribution.
+XXX Generate this with:
 
+  perl Porting/acknowledgements.pl v5.35.7..HEAD
 
 =head1 Reporting Bugs