new perldelta for 5.33.6

11 files changed, 614 insertions, 165 deletions

diff --git a/MANIFEST b/MANIFEST
index 3330df87b2..1585a99902 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -5228,6 +5228,7 @@ pod/perl5331delta.pod		Perl changes in version 5.33.1
 pod/perl5332delta.pod		Perl changes in version 5.33.2
 pod/perl5333delta.pod		Perl changes in version 5.33.3
 pod/perl5334delta.pod		Perl changes in version 5.33.4
+pod/perl5335delta.pod		Perl changes in version 5.33.5
 pod/perl561delta.pod		Perl changes in version 5.6.1
 pod/perl56delta.pod		Perl changes in version 5.6
 pod/perl581delta.pod		Perl changes in version 5.8.1
diff --git a/Makefile.SH b/Makefile.SH
index 7356f0a8f4..ba8d9bd19d 100755
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -589,7 +589,7 @@ esac
 
 $spitshell >>$Makefile <<'!NO!SUBS!'
 
-perltoc_pod_prereqs = extra.pods pod/perl5335delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
+perltoc_pod_prereqs = extra.pods pod/perl5336delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
 generated_pods = pod/perltoc.pod $(perltoc_pod_prereqs)
 generated_headers = uudmap.h bitcount.h mg_data.h
 
@@ -1153,9 +1153,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc
 pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST
 	$(MINIPERL) pod/perlmodlib.PL -q
 
-pod/perl5335delta.pod: pod/perldelta.pod
-	$(RMS) pod/perl5335delta.pod
-	$(LNS) perldelta.pod pod/perl5335delta.pod
+pod/perl5336delta.pod: pod/perldelta.pod
+	$(RMS) pod/perl5336delta.pod
+	$(LNS) perldelta.pod pod/perl5336delta.pod
 
 extra.pods: $(MINIPERL_EXE)
 	-@test ! -f extra.pods || rm -f `cat extra.pods`
diff --git a/pod/.gitignore b/pod/.gitignore
index def64fd7ee..5ff5f607bc 100644
--- a/pod/.gitignore
+++ b/pod/.gitignore
@@ -48,7 +48,7 @@
 /roffitall
 
 # generated
-/perl5335delta.pod
+/perl5336delta.pod
 /perlapi.pod
 /perlintern.pod
 /perlmodlib.pod
diff --git a/pod/perl.pod b/pod/perl.pod
index eaccc2e51c..90c1c8a5eb 100644
--- a/pod/perl.pod
+++ b/pod/perl.pod
@@ -183,6 +183,7 @@ aux h2ph h2xs perlbug pl2pm pod2html pod2man splain xsubpp
 
     perlhist		Perl history records
     perldelta		Perl changes since previous version
+    perl5335delta	Perl changes in version 5.33.5
     perl5334delta	Perl changes in version 5.33.4
     perl5333delta	Perl changes in version 5.33.3
     perl5332delta	Perl changes in version 5.33.2
diff --git a/pod/perl5335delta.pod b/pod/perl5335delta.pod
new file mode 100644
index 0000000000..b6b51f26ec
--- /dev/null
+++ b/pod/perl5335delta.pod
@@ -0,0 +1,341 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5335delta - what is new for perl v5.33.5
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.33.4 release and the 5.33.5
+release.
+
+If you are upgrading from an earlier release such as 5.33.3, first read
+L<perl5334delta>, which describes differences between 5.33.3 and 5.33.4.
+
+=head1 Core Enhancements
+
+=head2 New octal syntax C<0oI<ddddd>>
+
+It is now possible to specify octal literals with C<0o> prefixes,
+as in C<0o123_456>, parallel to the existing construct to specify
+hexadecimal literal C<0xI<ddddd>> and binary literal C<0bI<ddddd>>.
+Also, the builtin C<oct()> function now accepts this new syntax.
+
+See L<perldata/Scalar value constructors> and L<perlfunc/oct EXPR>.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<Carp> has been upgraded from version 1.50 to 1.51.
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.32 to 0.33.
+
+=item *
+
+L<DynaLoader> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<Encode> has been upgraded from version 3.07 to 3.08.
+
+=item *
+
+L<ExtUtils::Install> has been upgraded from version 2.18 to 2.20.
+
+=item *
+
+L<ExtUtils::ParseXS> has been upgraded from version 3.41 to 3.42.
+
+=item *
+
+L<File::Copy> has been upgraded from version 2.34 to 2.35.
+
+=item *
+
+L<File::Find> has been upgraded from version 1.37 to 1.38.
+
+=item *
+
+L<File::Spec> has been upgraded from version 3.79 to 3.80.
+
+=item *
+
+The libnet distribution has been upgraded from version 3.11 to 3.12.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20201120 to 5.20201220.
+
+=item *
+
+L<ODBM_File> has been upgraded from version 1.16 to 1.17.
+
+=item *
+
+L<Opcode> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<PerlIO::via::QuotedPrint> has been upgraded from version 0.08 to 0.09.
+
+=item *
+
+L<POSIX> has been upgraded from version 1.95 to 1.96.
+
+=item *
+
+L<Test::Harness> has been upgraded from version 3.42 to 3.43.
+
+=item *
+
+L<Text::Balanced> has been upgraded from version 2.03 to 2.04.
+
+=item *
+
+L<Time::HiRes> has been upgraded from version 1.9765 to 1.9766.
+
+=item *
+
+L<warnings> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<XS::APItest> has been upgraded from version 1.13 to 1.14.
+
+=back
+
+=head1 Documentation
+
+=head2 New Documentation
+
+=head3 L<perldocstyle> has been added to F<pod/>.
+
+This document is a guide for the authorship and maintenance of the
+documentation that ships with Perl.
+
+=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<perlfunc>
+
+=over 4
+
+=item *
+
+L<msgsnd()|perlfunc/msgsnd> documented a length field included in the
+packed C<MSG> parameter to msgsnd(), but there was no such field.
+C<MSG> contains only the type and the message content.
+
+=back
+
+=head1 Testing
+
+Tests were added and changed to reflect the other additions and
+changes in this release.  Furthermore, these significant changes were
+made:
+
+=over 4
+
+=item *
+
+When testing in parallel on many-core platforms, you can now cause the
+test suite to finish somewhat earlier, but with less logical ordering of
+the tests, by setting
+
+ PERL_TEST_HARNESS_ASAP=1
+
+while running the test suite.
+
+=back
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item Windows
+
+Windows now supports L<symlink()|perlfunc/symlink> and
+L<readlink()|perlfunc/readlink>, and L<lstat()|perlfunc/lstat> is no
+longer an alias for L<stat()|perlfunc/stat>.
+L<[#18005]|https://github.com/Perl/perl5/issues/18005>.
+
+Unlike POSIX systems, creating a symbolic link on Windows requires
+either elevated privileges or Windows 10 1703 or later with Developer
+Mode enabled.
+
+stat(), including C<stat FILEHANDLE>, and lstat() now uses our own
+implementation that populates the device C<dev> and inode numbers
+C<ino> returned rather than always returning zero.  The number of
+links C<nlink> field is now always populated.
+
+L<< C<${^WIN32_SLOPPY_STAT}> |perlvar/${^WIN32_SLOPPY_STAT} >> previously
+controlled whether the C<nlink> field was populated requiring a
+separate Windows API call to fetch, since nlink and the other
+information required for stat() is now retrieved in a single API call.
+
+The C<-r> and C<-w> operators now return true for the C<STDIN>,
+C<STDOUT> and C<STDERR> handles.  Unfortunately it still won't return
+true for duplicates of those handles.
+L<[#8502]|https://github.com/Perl/perl5/issues/8502>.
+
+The times returned by stat() and lstat() are no longer incorrect
+across Daylight Savings Time adjustments.
+L<[#6080]|https://github.com/Perl/perl5/issues/6080>.
+
+C<-x> on a filehandle should now match C<-x> on the corresponding
+filename on Vista or later.
+L<[#4145]|https://github.com/Perl/perl5/issues/4145>.
+
+C<-e '"'> no longer incorrectly returns true.
+L<[#12431]|https://github.com/Perl/perl5/issues/12431>.
+
+=back
+
+=head1 Internal Changes
+
+=over 4
+
+=item *
+
+All C<SvTRUE>-ish functions now evaluate their arguments exactly once.
+In 5.32, plain L<perlapi/C<SvTRUE>> was changed to do that; now the rest
+do as well.
+
+=item *
+
+Unicode is now a first class citizen when considering the pattern /A*B/ where
+A and B are arbitrary.  The pattern matching code tries to make a tight loop
+to match the span of A's.  The logic of this was now really updated with
+support for UTF-8.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+L<semctl()|perlfunc/semctl>, L<msgctl()|perlfunc/msgctl>, and
+L<shmctl()|perlfunc/shmctl> now properly reset the UTF-8 flag on the
+C<ARG> parameter if it's modified for C<IPC_STAT> or C<GETALL>
+operations.
+
+=item *
+
+semctl(), msgctl(), and shmctl() now attempt to downgrade the C<ARG>
+parameter if it's value is being used as input to C<IPC_SET> or
+C<SETALL> calls.  A failed downgrade will thrown an exception.
+
+=item *
+
+In cases where semctl(), msgctl() or shmctl() would treat the C<ARG>
+parameter as a pointer, an undefined value no longer generates a
+warning.  In most such calls the pointer isn't used anyway and this
+allows you to supply C<undef> for a value not used by the underlying
+function.
+
+=item *
+
+L<semop()|perlfunc/semop> now downgrades the C<OPSTRING> parameter,
+L<msgsnd()|perlfunc/msgsnd> now downgrades the C<MSG> parameter and
+L<shmwrite|perlfunc/shmwrite> now downgrades the C<STRING> parameter
+to treat them as bytes.  Previously they would be left upgraded,
+providing a corrupted structure to the underlying function call.
+
+=item *
+
+L<msgrcv()|perlfunc/msgrcv> now properly resets the UTF-8 flag the
+C<VAR> parameter when it is modified.  Previusly the UTF-8 flag could
+be left on, resulting in a possibly corrupt result in C<VAR>.
+
+=back
+
+=head1 Known Problems
+
+None
+
+=head1 Errata From Previous Releases
+
+None
+
+=head1 Acknowledgements
+
+Perl 5.33.5 represents approximately 4 weeks of development since Perl
+5.33.4 and contains approximately 22,000 lines of changes across 370 files
+from 27 authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 15,000 lines of changes to 220 .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 5.33.5:
+
+Branislav Zahradník, Chris 'BinGOs' Williams, Dan Book, Dan Kogai, David
+Cantrell, David Mitchell, Graham Knop, H.Merijn Brand, Jae Bradley, James E
+Keenan, Jason McIntosh, jkahrman, John Karr, Karen Etheridge, Karl
+Williamson, Leon Timmermans, Max Maischein, Paul Evans, Sawyer X, Sevan
+Janiyan, Shlomi Fish, Steve Hay, TAKAI Kousuke, Thibault Duponchelle, Tomasz
+Konojacki, Tom Hukins, 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 482733026b..bc2614eb56 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,123 +2,157 @@
 
 =head1 NAME
 
-perldelta - what is new for perl v5.33.5
+[ 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 v5.33.6
 
 =head1 DESCRIPTION
 
-This document describes differences between the 5.33.4 release and the 5.33.5
+This document describes differences between the 5.33.5 release and the 5.33.6
 release.
 
-If you are upgrading from an earlier release such as 5.33.3, first read
-L<perl5334delta>, which describes differences between 5.33.3 and 5.33.4.
+If you are upgrading from an earlier release such as 5.33.4, first read
+L<perl5335delta>, which describes differences between 5.33.4 and 5.33.5.
 
-=head1 Core Enhancements
+=head1 Notice
 
-=head2 New octal syntax C<0oI<ddddd>>
+XXX Any important notices here
 
-It is now possible to specify octal literals with C<0o> prefixes,
-as in C<0o123_456>, parallel to the existing construct to specify
-hexadecimal literal C<0xI<ddddd>> and binary literal C<0bI<ddddd>>.
-Also, the builtin C<oct()> function now accepts this new syntax.
+=head1 Core Enhancements
 
-See L<perldata/Scalar value constructors> and L<perlfunc/oct EXPR>.
+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.
 
-=head1 Modules and Pragmata
+[ List each enhancement as a =head2 entry ]
 
-=head2 Updated Modules and Pragmata
+=head1 Security
 
-=over 4
+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.
 
-=item *
+[ List each security issue as a =head2 entry ]
 
-L<Carp> has been upgraded from version 1.50 to 1.51.
+=head1 Incompatible Changes
 
-=item *
+XXX For a release on a stable branch, this section aspires to be:
 
-L<Config::Perl::V> has been upgraded from version 0.32 to 0.33.
+    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.
 
-=item *
+[ List each incompatible change as a =head2 entry ]
 
-L<DynaLoader> has been upgraded from version 1.48 to 1.49.
+=head1 Deprecations
 
-=item *
+XXX Any deprecated features, syntax, modules etc. should be listed here.
 
-L<Encode> has been upgraded from version 3.07 to 3.08.
+=head2 Module removals
 
-=item *
+XXX Remove this section if not applicable.
 
-L<ExtUtils::Install> has been upgraded from version 2.18 to 2.20.
+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.
 
-=item *
+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.
 
-L<ExtUtils::ParseXS> has been upgraded from version 3.41 to 3.42.
+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.
 
-=item *
+=over
 
-L<File::Copy> has been upgraded from version 2.34 to 2.35.
+=item XXX
 
-=item *
+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.
 
-L<File::Find> has been upgraded from version 1.37 to 1.38.
+=back
 
-=item *
+[ List each other deprecation as a =head2 entry ]
 
-L<File::Spec> has been upgraded from version 3.79 to 3.80.
+=head1 Performance Enhancements
 
-=item *
+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 ]
 
-The libnet distribution has been upgraded from version 3.11 to 3.12.
+=over 4
 
 =item *
 
-L<Module::CoreList> has been upgraded from version 5.20201120 to 5.20201220.
+XXX
 
-=item *
+=back
 
-L<ODBM_File> has been upgraded from version 1.16 to 1.17.
+=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<Opcode> has been upgraded from version 1.48 to 1.49.
+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<PerlIO::via::QuotedPrint> has been upgraded from version 0.08 to 0.09.
+=head2 New Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<POSIX> has been upgraded from version 1.95 to 1.96.
+XXX Remove this section if not applicable.
 
-=item *
+=back
 
-L<Test::Harness> has been upgraded from version 3.42 to 3.43.
+=head2 Updated Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<Text::Balanced> has been upgraded from version 2.03 to 2.04.
+L<XXX> has been upgraded from version A.xx to B.yy.
 
-=item *
+If there was something important to note about this change, include that here.
 
-L<Time::HiRes> has been upgraded from version 1.9765 to 1.9766.
+=back
 
-=item *
+=head2 Removed Modules and Pragmata
 
-L<warnings> has been upgraded from version 1.48 to 1.49.
+=over 4
 
 =item *
 
-L<XS::APItest> has been upgraded from version 1.13 to 1.14.
+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
 
-=head3 L<perldocstyle> has been added to F<pod/>.
+XXX Changes which create B<new> files in F<pod/> go here.
 
-This document is a guide for the authorship and maintenance of the
-documentation that ships with Perl.
+=head3 L<XXX>
+
+XXX Description of the purpose of the new file here
 
 =head2 Changes to Existing Documentation
 
@@ -126,182 +160,250 @@ 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<perlfunc>
+=head3 L<XXX>
 
 =over 4
 
 =item *
 
-L<msgsnd()|perlfunc/msgsnd> documented a length field included in the
-packed C<MSG> parameter to msgsnd(), but there was no such field.
-C<MSG> contains only the type and the message content.
+XXX Description of the change here
 
 =back
 
-=head1 Testing
+=head1 Diagnostics
 
-Tests were added and changed to reflect the other additions and
-changes in this release.  Furthermore, these significant changes were
-made:
+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 *
 
-When testing in parallel on many-core platforms, you can now cause the
-test suite to finish somewhat earlier, but with less logical ordering of
-the tests, by setting
+XXX L<message|perldiag/"message">
+
+=back
+
+=head3 New Warnings
+
+=over 4
 
- PERL_TEST_HARNESS_ASAP=1
+=item *
 
-while running the test suite.
+XXX L<message|perldiag/"message">
 
 =back
 
-=head2 Platform-Specific Notes
+=head2 Changes to Existing Diagnostics
+
+XXX Changes (i.e. rewording) of diagnostic messages go here
 
 =over 4
 
-=item Windows
+=item *
+
+XXX Describe change here
 
-Windows now supports L<symlink()|perlfunc/symlink> and
-L<readlink()|perlfunc/readlink>, and L<lstat()|perlfunc/lstat> is no
-longer an alias for L<stat()|perlfunc/stat>.
-L<[#18005]|https://github.com/Perl/perl5/issues/18005>.
+=back
 
-Unlike POSIX systems, creating a symbolic link on Windows requires
-either elevated privileges or Windows 10 1703 or later with Developer
-Mode enabled.
+=head1 Utility Changes
 
-stat(), including C<stat FILEHANDLE>, and lstat() now uses our own
-implementation that populates the device C<dev> and inode numbers
-C<ino> returned rather than always returning zero.  The number of
-links C<nlink> field is now always populated.
+XXX Changes to installed programs such as F<perldoc> and F<xsubpp> go here.
+Most of these are built within the directory F<utils>.
 
-L<< C<${^WIN32_SLOPPY_STAT}> |perlvar/${^WIN32_SLOPPY_STAT} >> previously
-controlled whether the C<nlink> field was populated requiring a
-separate Windows API call to fetch, since nlink and the other
-information required for stat() is now retrieved in a single API call.
+[ 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. ]
 
-The C<-r> and C<-w> operators now return true for the C<STDIN>,
-C<STDOUT> and C<STDERR> handles.  Unfortunately it still won't return
-true for duplicates of those handles.
-L<[#8502]|https://github.com/Perl/perl5/issues/8502>.
+=head2 L<XXX>
 
-The times returned by stat() and lstat() are no longer incorrect
-across Daylight Savings Time adjustments.
-L<[#6080]|https://github.com/Perl/perl5/issues/6080>.
+=over 4
 
-C<-x> on a filehandle should now match C<-x> on the corresponding
-filename on Vista or later.
-L<[#4145]|https://github.com/Perl/perl5/issues/4145>.
+=item *
 
-C<-e '"'> no longer incorrectly returns true.
-L<[#12431]|https://github.com/Perl/perl5/issues/12431>.
+XXX
 
 =back
 
-=head1 Internal Changes
+=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 *
 
-All C<SvTRUE>-ish functions now evaluate their arguments exactly once.
-In 5.32, plain L<perlapi/C<SvTRUE>> was changed to do that; now the rest
-do as well.
+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 *
 
-Unicode is now a first class citizen when considering the pattern /A*B/ where
-A and B are arbitrary.  The pattern matching code tries to make a tight loop
-to match the span of A's.  The logic of this was now really updated with
-support for UTF-8.
+XXX
 
 =back
 
-=head1 Selected Bug Fixes
+=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 *
+=item XXX-some-platform
 
-L<semctl()|perlfunc/semctl>, L<msgctl()|perlfunc/msgctl>, and
-L<shmctl()|perlfunc/shmctl> now properly reset the UTF-8 flag on the
-C<ARG> parameter if it's modified for C<IPC_STAT> or C<GETALL>
-operations.
+XXX
 
-=item *
+=back
 
-semctl(), msgctl(), and shmctl() now attempt to downgrade the C<ARG>
-parameter if it's value is being used as input to C<IPC_SET> or
-C<SETALL> calls.  A failed downgrade will thrown an exception.
+=head2 Discontinued Platforms
 
-=item *
+XXX List any platforms that this version of perl no longer compiles on.
+
+=over 4
 
-In cases where semctl(), msgctl() or shmctl() would treat the C<ARG>
-parameter as a pointer, an undefined value no longer generates a
-warning.  In most such calls the pointer isn't used anyway and this
-allows you to supply C<undef> for a value not used by the underlying
-function.
+=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 *
 
-L<semop()|perlfunc/semop> now downgrades the C<OPSTRING> parameter,
-L<msgsnd()|perlfunc/msgsnd> now downgrades the C<MSG> parameter and
-L<shmwrite|perlfunc/shmwrite> now downgrades the C<STRING> parameter
-to treat them as bytes.  Previously they would be left upgraded,
-providing a corrupted structure to the underlying function call.
+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 *
 
-L<msgrcv()|perlfunc/msgrcv> now properly resets the UTF-8 flag the
-C<VAR> parameter when it is modified.  Previusly the UTF-8 flag could
-be left on, resulting in a possibly corrupt result in C<VAR>.
+XXX
 
 =back
 
 =head1 Known Problems
 
-None
+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
 
-None
+=over 4
 
-=head1 Acknowledgements
+=item *
 
-Perl 5.33.5 represents approximately 4 weeks of development since Perl
-5.33.4 and contains approximately 22,000 lines of changes across 370 files
-from 27 authors.
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the perldelta of a previous release.
 
-Excluding auto-generated files, documentation and release tools, there were
-approximately 15,000 lines of changes to 220 .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 5.33.5:
+=head1 Obituary
 
-Branislav Zahradník, Chris 'BinGOs' Williams, Dan Book, Dan Kogai, David
-Cantrell, David Mitchell, Graham Knop, H.Merijn Brand, Jae Bradley, James E
-Keenan, Jason McIntosh, jkahrman, John Karr, Karen Etheridge, Karl
-Williamson, Leon Timmermans, Max Maischein, Paul Evans, Sawyer X, Sevan
-Janiyan, Shlomi Fish, Steve Hay, TAKAI Kousuke, Thibault Duponchelle, Tomasz
-Konojacki, Tom Hukins, Tony Cook.
+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 v5.33.5..HEAD
 
 =head1 Reporting Bugs
 
diff --git a/vms/descrip_mms.template b/vms/descrip_mms.template
index 0323f06035..925d2c34ca 100644
--- a/vms/descrip_mms.template
+++ b/vms/descrip_mms.template
@@ -313,7 +313,7 @@ utils : $(utils1) $(utils2) $(utils3) $(utils4) $(utils5)
 extra.pods : miniperl
 	@ @extra_pods.com
 
-PERLDELTA_CURRENT = [.pod]perl5335delta.pod
+PERLDELTA_CURRENT = [.pod]perl5336delta.pod
 
 $(PERLDELTA_CURRENT) : [.pod]perldelta.pod
 	Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT)
diff --git a/win32/GNUmakefile b/win32/GNUmakefile
index cb8c5cbb6b..17605bc9ca 100644
--- a/win32/GNUmakefile
+++ b/win32/GNUmakefile
@@ -1723,7 +1723,7 @@ utils: $(HAVEMINIPERL) ..\utils\Makefile
 	copy ..\README.tw       ..\pod\perltw.pod
 	copy ..\README.vos      ..\pod\perlvos.pod
 	copy ..\README.win32    ..\pod\perlwin32.pod
-	copy ..\pod\perldelta.pod ..\pod\perl5335delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5336delta.pod
 	$(MINIPERL) -I..\lib $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1821,7 +1821,7 @@ distclean: realclean
 	-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
 	-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
 	-cd $(PODDIR) && del /f *.html *.bat roffitall \
-	    perl5335delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5336delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlcn.pod perlcygwin.pod \
 	    perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
 	    perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
diff --git a/win32/Makefile b/win32/Makefile
index efd6d4bbf8..86129e3959 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -1240,7 +1240,7 @@ utils: $(PERLEXE) ..\utils\Makefile
 	copy ..\README.tw       ..\pod\perltw.pod
 	copy ..\README.vos      ..\pod\perlvos.pod
 	copy ..\README.win32    ..\pod\perlwin32.pod
-	copy ..\pod\perldelta.pod ..\pod\perl5335delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5336delta.pod
 	cd ..\win32
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
@@ -1339,7 +1339,7 @@ distclean: realclean
 	-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
 	-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
 	-cd $(PODDIR) && del /f *.html *.bat roffitall \
-	    perl5335delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5336delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlcn.pod perlcygwin.pod \
 	    perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
 	    perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
diff --git a/win32/makefile.mk b/win32/makefile.mk
index 1e3d5e0f12..7118945458 100644
--- a/win32/makefile.mk
+++ b/win32/makefile.mk
@@ -1641,7 +1641,7 @@ utils: $(HAVEMINIPERL) ..\utils\Makefile
 	copy ..\README.tw       ..\pod\perltw.pod
 	copy ..\README.vos      ..\pod\perlvos.pod
 	copy ..\README.win32    ..\pod\perlwin32.pod
-	copy ..\pod\perldelta.pod ..\pod\perl5335delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5336delta.pod
 	$(MINIPERL) -I..\lib $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1739,7 +1739,7 @@ distclean: realclean
 	-if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API
 	-if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS
 	-cd $(PODDIR) && del /f *.html *.bat roffitall \
-	    perl5335delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5336delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlcn.pod perlcygwin.pod \
 	    perldos.pod perlfreebsd.pod perlhaiku.pod perlhpux.pod \
 	    perlhurd.pod perlintern.pod perlirix.pod perljp.pod perlko.pod \
diff --git a/win32/pod.mak b/win32/pod.mak
index 9261aff3cd..f5ee35d830 100644
--- a/win32/pod.mak
+++ b/win32/pod.mak
@@ -69,6 +69,7 @@ POD = perl.pod	\
 	perl5333delta.pod	\
 	perl5334delta.pod	\
 	perl5335delta.pod	\
+	perl5336delta.pod	\
 	perl561delta.pod	\
 	perl56delta.pod	\
 	perl581delta.pod	\
@@ -235,6 +236,7 @@ MAN = perl.man	\
 	perl5333delta.man	\
 	perl5334delta.man	\
 	perl5335delta.man	\
+	perl5336delta.man	\
 	perl561delta.man	\
 	perl56delta.man	\
 	perl581delta.man	\
@@ -401,6 +403,7 @@ HTML = perl.html	\
 	perl5333delta.html	\
 	perl5334delta.html	\
 	perl5335delta.html	\
+	perl5336delta.html	\
 	perl561delta.html	\
 	perl56delta.html	\
 	perl581delta.html	\
@@ -567,6 +570,7 @@ TEX = perl.tex	\
 	perl5333delta.tex	\
 	perl5334delta.tex	\
 	perl5335delta.tex	\
+	perl5336delta.tex	\
 	perl561delta.tex	\
 	perl56delta.tex	\
 	perl581delta.tex	\