Create new perldelta for 5.26.3

11 files changed, 544 insertions, 119 deletions

diff --git a/MANIFEST b/MANIFEST
index e102bf9277..289eafc5be 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -4941,6 +4941,7 @@ pod/perl5242delta.pod		Perl changes in version 5.24.2
 pod/perl5243delta.pod		Perl changes in version 5.24.3
 pod/perl5260delta.pod		Perl changes in version 5.26.0
 pod/perl5261delta.pod		Perl changes in version 5.26.1
+pod/perl5262delta.pod		Perl changes in version 5.26.2
 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 260d04e0c0..2431e748b4 100755
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -570,7 +570,7 @@ esac
 
 $spitshell >>$Makefile <<'!NO!SUBS!'
 
-perltoc_pod_prereqs = extra.pods pod/perl5262delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
+perltoc_pod_prereqs = extra.pods pod/perl5263delta.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
 
@@ -1120,9 +1120,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc
 pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST
 	$(MINIPERL) pod/perlmodlib.PL -q
 
-pod/perl5262delta.pod: pod/perldelta.pod
-	$(RMS) pod/perl5262delta.pod
-	$(LNS) perldelta.pod pod/perl5262delta.pod
+pod/perl5263delta.pod: pod/perldelta.pod
+	$(RMS) pod/perl5263delta.pod
+	$(LNS) perldelta.pod pod/perl5263delta.pod
 
 extra.pods: $(MINIPERL_EXE)
 	-@test ! -f extra.pods || rm -f `cat extra.pods`
diff --git a/pod/.gitignore b/pod/.gitignore
index 9aae8e94ce..fcf35a612b 100644
--- a/pod/.gitignore
+++ b/pod/.gitignore
@@ -50,7 +50,7 @@
 /roffitall
 
 # generated
-/perl5262delta.pod
+/perl5263delta.pod
 /perlapi.pod
 /perlintern.pod
 /perlmodlib.pod
diff --git a/pod/perl.pod b/pod/perl.pod
index 4e4661e312..48cda6346c 100644
--- a/pod/perl.pod
+++ b/pod/perl.pod
@@ -181,6 +181,7 @@ aux h2ph h2xs perlbug pl2pm pod2html pod2man splain xsubpp
 
     perlhist		Perl history records
     perldelta		Perl changes since previous version
+    perl5262delta	Perl changes in version 5.26.2
     perl5261delta	Perl changes in version 5.26.1
     perl5260delta	Perl changes in version 5.26.0
     perl5243delta	Perl changes in version 5.24.3
diff --git a/pod/perl5262delta.pod b/pod/perl5262delta.pod
new file mode 100644
index 0000000000..5e528ea89f
--- /dev/null
+++ b/pod/perl5262delta.pod
@@ -0,0 +1,245 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5262delta - what is new for perl v5.26.2
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.26.1 release and the 5.26.2
+release.
+
+If you are upgrading from an earlier release such as 5.26.0, first read
+L<perl5261delta>, which describes differences between 5.26.0 and 5.26.1.
+
+=head1 Security
+
+=head2 [CVE-2018-6797] heap-buffer-overflow (WRITE of size 1) in S_regatom (regcomp.c)
+
+A crafted regular expression could cause a heap buffer write overflow, with
+control over the bytes written.
+L<[perl #132227]|https://rt.perl.org/Public/Bug/Display.html?id=132227>
+
+=head2 [CVE-2018-6798] Heap-buffer-overflow in Perl__byte_dump_string (utf8.c)
+
+Matching a crafted locale dependent regular expression could cause a heap
+buffer read overflow and potentially information disclosure.
+L<[perl #132063]|https://rt.perl.org/Public/Bug/Display.html?id=132063>
+
+=head2 [CVE-2018-6913] heap-buffer-overflow in S_pack_rec
+
+C<pack()> could cause a heap buffer write overflow with a large item count.
+L<[perl #131844]|https://rt.perl.org/Public/Bug/Display.html?id=131844>
+
+=head2 Assertion failure in Perl__core_swash_init (utf8.c)
+
+Control characters in a supposed Unicode property name could cause perl to
+crash.  This has been fixed.
+L<[perl #132055]|https://rt.perl.org/Public/Bug/Display.html?id=132055>
+L<[perl #132553]|https://rt.perl.org/Public/Bug/Display.html?id=132553>
+L<[perl #132658]|https://rt.perl.org/Public/Bug/Display.html?id=132658>
+
+=head1 Incompatible Changes
+
+There are no changes intentionally incompatible with 5.26.1.  If any exist,
+they are bugs, and we request that you submit a report.  See L</Reporting
+Bugs> below.
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20170922_26 to 5.20180414_26.
+
+=item *
+
+L<PerlIO::via> has been upgraded from version 0.16 to 0.17.
+
+=item *
+
+L<Term::ReadLine> has been upgraded from version 1.16 to 1.17.
+
+=item *
+
+L<Unicode::UCD> has been upgraded from version 0.68 to 0.69.
+
+=back
+
+=head1 Documentation
+
+=head2 Changes to Existing Documentation
+
+=head3 L<perluniprops>
+
+=over 4
+
+=item *
+
+This has been updated to note that C<\p{Word}> now includes code points
+matching the C<\p{Join_Control}> property.  The change to the property was made
+in Perl 5.18, but not documented until now.  There are currently only two code
+points that match this property: U+200C (ZERO WIDTH NON-JOINER) and U+200D
+(ZERO WIDTH JOINER).
+
+=back
+
+=head1 Platform Support
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item Windows
+
+Visual C++ compiler version detection has been improved to work on non-English
+language systems.
+L<[perl #132421]|https://rt.perl.org/Public/Bug/Display.html?id=132421>
+
+We now set C<$Config{libpth}> correctly for 64-bit builds using Visual C++
+versions earlier than 14.1.
+L<[perl #132484]|https://rt.perl.org/Public/Bug/Display.html?id=132484>
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+The C<readpipe()> built-in function now checks at compile time that it has only
+one parameter expression, and puts it in scalar context, thus ensuring that it
+doesn't corrupt the stack at runtime.
+L<[perl #4574]|https://rt.perl.org/Public/Bug/Display.html?id=4574>
+
+=item *
+
+Fixed a use after free bug in C<pp_list> introduced in Perl 5.27.1.
+L<[perl #131954]|https://rt.perl.org/Public/Bug/Display.html?id=131954>
+
+=item *
+
+Parsing a C<sub> definition could cause a use after free if the C<sub> keyword
+was followed by whitespace including newlines (and comments).
+L<[perl #131836]|https://rt.perl.org/Public/Bug/Display.html?id=131836>
+
+=item *
+
+The tokenizer now correctly adjusts a parse pointer when skipping whitespace in
+an C< ${identifier} > construct.
+L<[perl #131949]|https://rt.perl.org/Public/Bug/Display.html?id=131949>
+
+=item *
+
+Accesses to C<${^LAST_FH}> no longer assert after using any of a variety of I/O
+operations on a non-glob.
+L<[perl #128263]|https://rt.perl.org/Public/Bug/Display.html?id=128263>
+
+=item *
+
+C<sort> now performs correct reference counting when aliasing C<$a> and C<$b>,
+thus avoiding premature destruction and leakage of scalars if they are
+re-aliased during execution of the sort comparator.
+L<[perl #92264]|https://rt.perl.org/Public/Bug/Display.html?id=92264>
+
+=item *
+
+Some convoluted kinds of regexp no longer cause an arithmetic overflow when
+compiled.
+L<[perl #131893]|https://rt.perl.org/Public/Bug/Display.html?id=131893>
+
+=item *
+
+Fixed a duplicate symbol failure with B<-flto -mieee-fp> builds.  F<pp.c>
+defined C<_LIB_VERSION> which B<-lieee> already defines.
+L<[perl #131786]|https://rt.perl.org/Public/Bug/Display.html?id=131786>
+
+=item *
+
+A NULL pointer dereference in the C<S_regmatch()> function has been fixed.
+L<[perl #132017]|https://rt.perl.org/Public/Bug/Display.html?id=132017>
+
+=item *
+
+Failures while compiling code within other constructs, such as with string
+interpolation and the right part of C<s///e> now cause compilation to abort
+earlier.
+
+Previously compilation could continue in order to report other errors, but the
+failed sub-parse could leave partly parsed constructs on the parser
+shift-reduce stack, confusing the parser, leading to perl crashes.
+L<[perl #125351]|https://rt.perl.org/Public/Bug/Display.html?id=125351>
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.26.2 represents approximately 7 months of development since Perl 5.26.1
+and contains approximately 3,300 lines of changes across 82 files from 17
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 1,800 lines of changes to 36 .pm, .t, .c and .h files.
+
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers.  The following people are known to have contributed
+the improvements that became Perl 5.26.2:
+
+Aaron Crane, Abigail, Chris 'BinGOs' Williams, H.Merijn Brand, James E Keenan,
+Jarkko Hietaniemi, John SJ Anderson, Karen Etheridge, Karl Williamson, Lukas
+Mai, Renee Baecker, Sawyer X, Steve Hay, Todd Rinaldo, Tony Cook, Yves Orton,
+Zefram.
+
+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://rt.perl.org/> .  There may also be information at
+L<http://www.perl.org/> , the Perl Home Page.
+
+If you believe you have an unreported bug, please run the L<perlbug> program
+included with your release.  Be sure to trim your bug down to a tiny but
+sufficient test case.  Your bug report, along with the output of C<perl -V>,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+
+If the bug you are reporting has security implications which make it
+inappropriate to send to a publicly archived mailing list, 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 677ce3f9a5..b7306d8a0f 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,209 +2,383 @@
 
 =head1 NAME
 
-perldelta - what is new for perl v5.26.2
+[ 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 v5.26.3
 
 =head1 DESCRIPTION
 
-This document describes differences between the 5.26.1 release and the 5.26.2
+This document describes differences between the 5.26.2 release and the 5.26.3
 release.
 
-If you are upgrading from an earlier release such as 5.26.0, first read
-L<perl5261delta>, which describes differences between 5.26.0 and 5.26.1.
+If you are upgrading from an earlier release such as 5.26.1, first read
+L<perl5262delta>, which describes differences between 5.26.1 and 5.26.2.
+
+=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 ]
 
 =head1 Security
 
-=head2 [CVE-2018-6797] heap-buffer-overflow (WRITE of size 1) in S_regatom (regcomp.c)
+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 crafted regular expression could cause a heap buffer write overflow, with
-control over the bytes written.
-L<[perl #132227]|https://rt.perl.org/Public/Bug/Display.html?id=132227>
+[ List each security issue as a =head2 entry ]
 
-=head2 [CVE-2018-6798] Heap-buffer-overflow in Perl__byte_dump_string (utf8.c)
+=head1 Incompatible Changes
 
-Matching a crafted locale dependent regular expression could cause a heap
-buffer read overflow and potentially information disclosure.
-L<[perl #132063]|https://rt.perl.org/Public/Bug/Display.html?id=132063>
+XXX For a release on a stable branch, this section aspires to be:
 
-=head2 [CVE-2018-6913] heap-buffer-overflow in S_pack_rec
+    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.
 
-C<pack()> could cause a heap buffer write overflow with a large item count.
-L<[perl #131844]|https://rt.perl.org/Public/Bug/Display.html?id=131844>
+[ List each incompatible change as a =head2 entry ]
 
-=head2 Assertion failure in Perl__core_swash_init (utf8.c)
+=head1 Deprecations
 
-Control characters in a supposed Unicode property name could cause perl to
-crash.  This has been fixed.
-L<[perl #132055]|https://rt.perl.org/Public/Bug/Display.html?id=132055>
-L<[perl #132553]|https://rt.perl.org/Public/Bug/Display.html?id=132553>
-L<[perl #132658]|https://rt.perl.org/Public/Bug/Display.html?id=132658>
+XXX Any deprecated features, syntax, modules etc. should be listed here.
 
-=head1 Incompatible Changes
+=head2 Module removals
 
-There are no changes intentionally incompatible with 5.26.1.  If any exist,
-they are bugs, and we request that you submit a report.  See L</Reporting
-Bugs> below.
+XXX Remove this section if inapplicable.
 
-=head1 Modules and Pragmata
+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.
 
-=head2 Updated Modules and Pragmata
+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 a =item entry ]
 
 =over 4
 
 =item *
 
-L<Module::CoreList> has been upgraded from version 5.20170922_26 to 5.20180414_26.
+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.
+
+[ Within each section, list entries as a =item entry ]
+
+=head2 New Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<PerlIO::via> has been upgraded from version 0.16 to 0.17.
+XXX
+
+=back
+
+=head2 Updated Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<Term::ReadLine> has been upgraded from version 1.16 to 1.17.
+L<XXX> has been upgraded from version A.xx to B.yy.
+
+=back
+
+=head2 Removed Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<Unicode::UCD> has been upgraded from version 0.68 to 0.69.
+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
 
-=head3 L<perluniprops>
+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.
+
+=head3 L<XXX>
 
 =over 4
 
 =item *
 
-This has been updated to note that C<\p{Word}> now includes code points
-matching the C<\p{Join_Control}> property.  The change to the property was made
-in Perl 5.18, but not documented until now.  There are currently only two code
-points that match this property: U+200C (ZERO WIDTH NON-JOINER) and U+200D
-(ZERO WIDTH JOINER).
+XXX Description of the change here
 
 =back
 
-=head1 Platform Support
+=head1 Diagnostics
 
-=head2 Platform-Specific Notes
+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>.
 
-=over 4
+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.
 
-=item Windows
+=head2 New Diagnostics
 
-Visual C++ compiler version detection has been improved to work on non-English
-language systems.
-L<[perl #132421]|https://rt.perl.org/Public/Bug/Display.html?id=132421>
+XXX Newly added diagnostic messages go under here, separated into New Errors
+and New Warnings
 
-We now set C<$Config{libpth}> correctly for 64-bit builds using Visual C++
-versions earlier than 14.1.
-L<[perl #132484]|https://rt.perl.org/Public/Bug/Display.html?id=132484>
+=head3 New Errors
+
+=over 4
+
+=item *
+
+XXX L<message|perldiag/"message">
 
 =back
 
-=head1 Selected Bug Fixes
+=head3 New Warnings
 
 =over 4
 
 =item *
 
-The C<readpipe()> built-in function now checks at compile time that it has only
-one parameter expression, and puts it in scalar context, thus ensuring that it
-doesn't corrupt the stack at runtime.
-L<[perl #4574]|https://rt.perl.org/Public/Bug/Display.html?id=4574>
+XXX L<message|perldiag/"message">
 
-=item *
+=back
 
-Fixed a use after free bug in C<pp_list> introduced in Perl 5.27.1.
-L<[perl #131954]|https://rt.perl.org/Public/Bug/Display.html?id=131954>
+=head2 Changes to Existing Diagnostics
 
-=item *
+XXX Changes (i.e. rewording) of diagnostic messages go here
 
-Parsing a C<sub> definition could cause a use after free if the C<sub> keyword
-was followed by whitespace including newlines (and comments).
-L<[perl #131836]|https://rt.perl.org/Public/Bug/Display.html?id=131836>
+=over 4
 
 =item *
 
-The tokenizer now correctly adjusts a parse pointer when skipping whitespace in
-an C< ${identifier} > construct.
-L<[perl #131949]|https://rt.perl.org/Public/Bug/Display.html?id=131949>
+XXX Describe change here
 
-=item *
+=back
+
+=head1 Utility Changes
 
-Accesses to C<${^LAST_FH}> no longer assert after using any of a variety of I/O
-operations on a non-glob.
-L<[perl #128263]|https://rt.perl.org/Public/Bug/Display.html?id=128263>
+XXX Changes to installed programs such as F<perlbug> 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 *
 
-C<sort> now performs correct reference counting when aliasing C<$a> and C<$b>,
-thus avoiding premature destruction and leakage of scalars if they are
-re-aliased during execution of the sort comparator.
-L<[perl #92264]|https://rt.perl.org/Public/Bug/Display.html?id=92264>
+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 a =item entry ].
+
+=over 4
 
 =item *
 
-Some convoluted kinds of regexp no longer cause an arithmetic overflow when
-compiled.
-L<[perl #131893]|https://rt.perl.org/Public/Bug/Display.html?id=131893>
+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.
+
+[ List each test improvement as a =item entry ]
+
+=over 4
 
 =item *
 
-Fixed a duplicate symbol failure with B<-flto -mieee-fp> builds.  F<pp.c>
-defined C<_LIB_VERSION> which B<-lieee> already defines.
-L<[perl #131786]|https://rt.perl.org/Public/Bug/Display.html?id=131786>
+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 a =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 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 a =item entry ]
+
+=over 4
 
 =item *
 
-A NULL pointer dereference in the C<S_regmatch()> function has been fixed.
-L<[perl #132017]|https://rt.perl.org/Public/Bug/Display.html?id=132017>
+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 a =item entry ]
+
+=over 4
 
 =item *
 
-Failures while compiling code within other constructs, such as with string
-interpolation and the right part of C<s///e> now cause compilation to abort
-earlier.
+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.
 
-Previously compilation could continue in order to report other errors, but the
-failed sub-parse could leave partly parsed constructs on the parser
-shift-reduce stack, confusing the parser, leading to perl crashes.
-L<[perl #125351]|https://rt.perl.org/Public/Bug/Display.html?id=125351>
+[ List each fix as a =item entry ]
+
+=over 4
+
+=item *
+
+XXX
 
 =back
 
-=head1 Acknowledgements
+=head1 Errata From Previous Releases
+
+=over 4
 
-Perl 5.26.2 represents approximately 7 months of development since Perl 5.26.1
-and contains approximately 3,300 lines of changes across 82 files from 17
-authors.
+=item *
+
+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 1,800 lines of changes to 36 .pm, .t, .c and .h files.
+=back
 
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers.  The following people are known to have contributed
-the improvements that became Perl 5.26.2:
+=head1 Obituary
 
-Aaron Crane, Abigail, Chris 'BinGOs' Williams, H.Merijn Brand, James E Keenan,
-Jarkko Hietaniemi, John SJ Anderson, Karen Etheridge, Karl Williamson, Lukas
-Mai, Renee Baecker, Sawyer X, Steve Hay, Todd Rinaldo, Tony Cook, Yves Orton,
-Zefram.
+XXX If any significant core contributor has died, we've added 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 v5.26.2..HEAD
 
 =head1 Reporting Bugs
 
diff --git a/vms/descrip_mms.template b/vms/descrip_mms.template
index d976985396..3ea179ae91 100644
--- a/vms/descrip_mms.template
+++ b/vms/descrip_mms.template
@@ -307,7 +307,7 @@ utils : $(utils1) $(utils2) $(utils3) $(utils4) $(utils5)
 extra.pods : miniperl
 	@ @extra_pods.com
 
-PERLDELTA_CURRENT = [.pod]perl5262delta.pod
+PERLDELTA_CURRENT = [.pod]perl5263delta.pod
 
 $(PERLDELTA_CURRENT) : [.pod]perldelta.pod
 	Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT)
diff --git a/win32/GNUmakefile b/win32/GNUmakefile
index c20d66bec5..34f9de741c 100644
--- a/win32/GNUmakefile
+++ b/win32/GNUmakefile
@@ -1691,7 +1691,7 @@ 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\perl5262delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5263delta.pod
 	$(MINIPERL) -I..\lib $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1788,7 +1788,7 @@ 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 \
-	    perl5262delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5263delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlce.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 aff1f899ac..20b8191ec8 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -1291,7 +1291,7 @@ 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\perl5262delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5263delta.pod
 	cd ..\win32
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
@@ -1390,7 +1390,7 @@ 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 \
-	    perl5262delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5263delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlce.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 f68673bcb7..4289f0f8f1 100644
--- a/win32/makefile.mk
+++ b/win32/makefile.mk
@@ -1605,7 +1605,7 @@ 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\perl5262delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5263delta.pod
 	$(MINIPERL) -I..\lib $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1703,7 +1703,7 @@ 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 \
-	    perl5262delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5263delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
 	    perlapi.pod perlbs2000.pod perlce.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 d0f66bf6a2..58ced0f103 100644
--- a/win32/pod.mak
+++ b/win32/pod.mak
@@ -52,6 +52,7 @@ POD = perl.pod	\
 	perl5260delta.pod	\
 	perl5261delta.pod	\
 	perl5262delta.pod	\
+	perl5263delta.pod	\
 	perl561delta.pod	\
 	perl56delta.pod	\
 	perl581delta.pod	\
@@ -199,6 +200,7 @@ MAN = perl.man	\
 	perl5260delta.man	\
 	perl5261delta.man	\
 	perl5262delta.man	\
+	perl5263delta.man	\
 	perl561delta.man	\
 	perl56delta.man	\
 	perl581delta.man	\
@@ -345,6 +347,7 @@ HTML = perl.html	\
 	perl5260delta.html	\
 	perl5261delta.html	\
 	perl5262delta.html	\
+	perl5263delta.html	\
 	perl561delta.html	\
 	perl56delta.html	\
 	perl581delta.html	\
@@ -492,6 +495,7 @@ TEX = perl.tex	\
 	perl5260delta.tex	\
 	perl5261delta.tex	\
 	perl5262delta.tex	\
+	perl5263delta.tex	\
 	perl561delta.tex	\
 	perl56delta.tex	\
 	perl581delta.tex	\