New perldelta for 5.27.6

11 files changed, 550 insertions, 102 deletions

diff --git a/MANIFEST b/MANIFEST
index 124812b3ce..8730e4f978 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -5016,6 +5016,7 @@ pod/perl5271delta.pod		Perl changes in version 5.27.1
 pod/perl5272delta.pod		Perl changes in version 5.27.2
 pod/perl5273delta.pod		Perl changes in version 5.27.3
 pod/perl5274delta.pod		Perl changes in version 5.27.4
+pod/perl5275delta.pod		Perl changes in version 5.27.5
 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 c7a1570463..38edeadbfe 100755
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -570,7 +570,7 @@ esac
 
 $spitshell >>$Makefile <<'!NO!SUBS!'
 
-perltoc_pod_prereqs = extra.pods pod/perl5275delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
+perltoc_pod_prereqs = extra.pods pod/perl5276delta.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/perl5275delta.pod: pod/perldelta.pod
-	$(RMS) pod/perl5275delta.pod
-	$(LNS) perldelta.pod pod/perl5275delta.pod
+pod/perl5276delta.pod: pod/perldelta.pod
+	$(RMS) pod/perl5276delta.pod
+	$(LNS) perldelta.pod pod/perl5276delta.pod
 
 extra.pods: $(MINIPERL_EXE)
 	-@test ! -f extra.pods || rm -f `cat extra.pods`
diff --git a/pod/.gitignore b/pod/.gitignore
index ff8f6f9582..2f3320b60c 100644
--- a/pod/.gitignore
+++ b/pod/.gitignore
@@ -50,7 +50,7 @@
 /roffitall
 
 # generated
-/perl5275delta.pod
+/perl5276delta.pod
 /perlapi.pod
 /perlintern.pod
 /perlmodlib.pod
diff --git a/pod/perl.pod b/pod/perl.pod
index 3c5b431694..f63b84ada4 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
+    perl5275delta	Perl changes in version 5.27.5
     perl5274delta	Perl changes in version 5.27.4
     perl5273delta	Perl changes in version 5.27.3
     perl5272delta	Perl changes in version 5.27.2
diff --git a/pod/perl5275delta.pod b/pod/perl5275delta.pod
new file mode 100644
index 0000000000..77695715c0
--- /dev/null
+++ b/pod/perl5275delta.pod
@@ -0,0 +1,245 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5275delta - what is new for perl v5.27.5
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.27.4 release and the 5.27.5
+release.
+
+If you are upgrading from an earlier release such as 5.27.3, first read
+L<perl5274delta>, which describes differences between 5.27.3 and 5.27.4.
+
+=head1 Performance Enhancements
+
+=over 4
+
+=item *
+
+Calls to C<require> for an already loaded module are now slightly faster.
+L<[perl #132171]|https://rt.perl.org/Public/Bug/Display.html?id=132171>
+
+=back
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<arybase> has been upgraded from version 0.13 to 0.14.
+
+=item *
+
+L<B> has been upgraded from version 1.69 to 1.70.
+
+=item *
+
+L<B::Concise> has been upgraded from version 1.001 to 1.002.
+
+=item *
+
+L<B::Deparse> has been upgraded from version 1.42 to 1.43.
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.28 to 0.29.
+
+=item *
+
+L<Digest::SHA> has been upgraded from version 5.96 to 5.98.
+
+=item *
+
+L<Encode> has been upgraded from version 2.92 to 2.93.
+
+=item *
+
+L<encoding> has been upgraded from version 2.20 to 2.21.
+
+=item *
+
+L<File::Fetch> has been upgraded from version 0.52 to 0.54.
+
+=item *
+
+L<File::Path> has been upgraded from version 2.14 to 2.15.
+
+=item *
+
+L<List::Util> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<Locale::Codes> has been upgraded from version 3.52 to 3.54.
+
+=item *
+
+L<Math::BigInt> has been upgraded from version 1.999806 to 1.999811.
+
+=item *
+
+L<Math::BigInt::FastCalc> has been upgraded from version 0.5005 to 0.5006.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20170920 to 5.20171020.
+
+=item *
+
+L<NEXT> has been upgraded from version 0.67 to 0.67_01.
+
+=item *
+
+L<Pod::Perldoc> has been upgraded from version 3.28 to 3.2801.
+
+=item *
+
+L<POSIX> has been upgraded from version 1.77 to 1.78.
+
+=item *
+
+L<Scalar::Util> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<Sub::Util> has been upgraded from version 1.48 to 1.49.
+
+=item *
+
+L<Sys::Hostname> has been upgraded from version 1.20 to 1.21.
+
+=item *
+
+L<Test::Simple> has been upgraded from version 1.302073 to 1.302103.
+
+=item *
+
+L<Time::HiRes> has been upgraded from version 1.9743 to 1.9746.
+
+=item *
+
+L<Time::Piece> has been upgraded from version 1.3201 to 1.3202.
+
+=back
+
+=head1 Platform Support
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item CentOS
+
+Compilation on CentOS 5 is now fixed.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+Calling L<exec PROGRAM LIST|perlfunc/exec PROGRAM LIST> with an empty C<LIST>
+has been fixed.  This should call C<execvp()> with an empty C<argv> array
+(containing only the terminating C<NULL> pointer), but was instead just
+returning false (and not setting L<C<$!>|perlvar/$!>).
+L<[perl #131730]|https://rt.perl.org/Public/Bug/Display.html?id=131730>
+
+=item *
+
+The C<gv_fetchmeth_sv> C function stopped working properly in Perl 5.22 when
+fetching a constant with a UTF-8 name if that constant subroutine was stored in
+the stash as a simple scalar reference, rather than a full typeglob.  This has
+been corrected.
+
+=item *
+
+Single-letter debugger commands followed by an argument which starts with
+punctuation  (e.g. C<p$^V> and C<x@ARGV>) now work again.  They had been
+wrongly requiring a space between the command and the argument.
+L<[perl #120174]|https://rt.perl.org/Public/Bug/Display.html?id=120174>
+
+=item *
+
+L<splice|perlfunc/splice ARRAY,OFFSET,LENGTH,LIST> now throws an exception
+("Modification of a read-only value attempted") when modifying a read-only
+array.  Until now it had been silently modifying the array.  The new behaviour
+is consistent with the behaviour of L<push|perlfunc/push ARRAY,LIST> and
+L<unshift|perlfunc/unshift ARRAY,LIST>.
+L<[perl #131000]|https://rt.perl.org/Public/Bug/Display.html?id=131000>
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.27.5 represents approximately 4 weeks of development since Perl 5.27.4
+and contains approximately 29,000 lines of changes across 430 files from 20
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 17,000 lines of changes to 340 .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 5.27.5:
+
+Aaron Crane, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
+Mannsåker, Dmitry Ulanov, Dominic Hargreaves, Father Chrysostomos, H.Merijn
+Brand, James E Keenan, John P. Linderman, John SJ Anderson, Lukas Mai, Nicolas
+R., Sawyer X, Smylers, Steve Hay, Tom Hukins, 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 eb480f3d61..d54e0fbb34 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,209 +2,406 @@
 
 =head1 NAME
 
-perldelta - what is new for perl v5.27.5
+[ 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 v5.27.6
 
 =head1 DESCRIPTION
 
-This document describes differences between the 5.27.4 release and the 5.27.5
+This document describes differences between the 5.27.5 release and the 5.27.6
 release.
 
-If you are upgrading from an earlier release such as 5.27.3, first read
-L<perl5274delta>, which describes differences between 5.27.3 and 5.27.4.
+If you are upgrading from an earlier release such as 5.27.4, first read
+L<perl5275delta>, which describes differences between 5.27.4 and 5.27.5.
+
+=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 ]
+
+=head1 Deprecations
+
+XXX Any deprecated features, syntax, modules etc. should be listed here.
+
+=head2 Module removals
+
+XXX Remove this section if inapplicable.
+
+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 *
 
-Calls to C<require> for an already loaded module are now slightly faster.
-L<[perl #132171]|https://rt.perl.org/Public/Bug/Display.html?id=132171>
+XXX
 
 =back
 
 =head1 Modules and Pragmata
 
-=head2 Updated 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
 
 =item *
 
-L<arybase> has been upgraded from version 0.13 to 0.14.
+XXX
 
-=item *
+=back
 
-L<B> has been upgraded from version 1.69 to 1.70.
+=head2 Updated Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<B::Concise> has been upgraded from version 1.001 to 1.002.
+L<XXX> has been upgraded from version A.xx to B.yy.
 
-=item *
+=back
 
-L<B::Deparse> has been upgraded from version 1.42 to 1.43.
+=head2 Removed Modules and Pragmata
+
+=over 4
 
 =item *
 
-L<Config::Perl::V> has been upgraded from version 0.28 to 0.29.
+XXX
 
-=item *
+=back
 
-L<Digest::SHA> has been upgraded from version 5.96 to 5.98.
+=head1 Documentation
 
-=item *
+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>.
 
-L<Encode> has been upgraded from version 2.92 to 2.93.
+=head2 New Documentation
 
-=item *
+XXX Changes which create B<new> files in F<pod/> go here.
 
-L<encoding> has been upgraded from version 2.20 to 2.21.
+=head3 L<XXX>
 
-=item *
+XXX Description of the purpose of the new file here
 
-L<File::Fetch> has been upgraded from version 0.52 to 0.54.
+=head2 Changes to Existing Documentation
 
-=item *
+We have attempted to update the documentation to reflect the changes
+listed in this document.  If you find any we have missed, send email
+to L<perlbug@perl.org|mailto:perlbug@perl.org>.
 
-L<File::Path> has been upgraded from version 2.14 to 2.15.
+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.
 
-=item *
+Additionally, the following selected changes have been made:
+
+=head3 L<XXX>
 
-L<List::Util> has been upgraded from version 1.48 to 1.49.
+=over 4
 
 =item *
 
-L<Locale::Codes> has been upgraded from version 3.52 to 3.54.
+XXX Description of the change here
 
-=item *
+=back
 
-L<Math::BigInt> has been upgraded from version 1.999806 to 1.999811.
+=head1 Diagnostics
 
-=item *
+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>.
 
-L<Math::BigInt::FastCalc> has been upgraded from version 0.5005 to 0.5006.
+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 *
+=head2 New Diagnostics
 
-L<Module::CoreList> has been upgraded from version 5.20170920 to 5.20171020.
+XXX Newly added diagnostic messages go under here, separated into New Errors
+and New Warnings
 
-=item *
+=head3 New Errors
 
-L<NEXT> has been upgraded from version 0.67 to 0.67_01.
+=over 4
 
 =item *
 
-L<Pod::Perldoc> has been upgraded from version 3.28 to 3.2801.
+XXX L<message|perldiag/"message">
 
-=item *
+=back
+
+=head3 New Warnings
 
-L<POSIX> has been upgraded from version 1.77 to 1.78.
+=over 4
 
 =item *
 
-L<Scalar::Util> has been upgraded from version 1.48 to 1.49.
+XXX L<message|perldiag/"message">
 
-=item *
+=back
+
+=head2 Changes to Existing Diagnostics
 
-L<Sub::Util> has been upgraded from version 1.48 to 1.49.
+XXX Changes (i.e. rewording) of diagnostic messages go here
+
+=over 4
 
 =item *
 
-L<Sys::Hostname> has been upgraded from version 1.20 to 1.21.
+XXX Describe change here
+
+=back
+
+=head1 Utility Changes
+
+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 *
 
-L<Test::Simple> has been upgraded from version 1.302073 to 1.302103.
+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<Time::HiRes> has been upgraded from version 1.9743 to 1.9746.
+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 *
 
-L<Time::Piece> has been upgraded from version 1.3201 to 1.3202.
+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 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 CentOS
+=item XXX-some-platform
 
-Compilation on CentOS 5 is now fixed.
+XXX
 
 =back
 
-=head1 Selected Bug Fixes
+=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 *
 
-Calling L<exec PROGRAM LIST|perlfunc/exec PROGRAM LIST> with an empty C<LIST>
-has been fixed.  This should call C<execvp()> with an empty C<argv> array
-(containing only the terminating C<NULL> pointer), but was instead just
-returning false (and not setting L<C<$!>|perlvar/$!>).
-L<[perl #131730]|https://rt.perl.org/Public/Bug/Display.html?id=131730>
+XXX
 
-=item *
+=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>.
 
-The C<gv_fetchmeth_sv> C function stopped working properly in Perl 5.22 when
-fetching a constant with a UTF-8 name if that constant subroutine was stored in
-the stash as a simple scalar reference, rather than a full typeglob.  This has
-been corrected.
+[ List each fix as an =item entry ]
+
+=over 4
 
 =item *
 
-Single-letter debugger commands followed by an argument which starts with
-punctuation  (e.g. C<p$^V> and C<x@ARGV>) now work again.  They had been
-wrongly requiring a space between the command and the argument.
-L<[perl #120174]|https://rt.perl.org/Public/Bug/Display.html?id=120174>
+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.
+
+[ List each fix as an =item entry ]
+
+=over 4
 
 =item *
 
-L<splice|perlfunc/splice ARRAY,OFFSET,LENGTH,LIST> now throws an exception
-("Modification of a read-only value attempted") when modifying a read-only
-array.  Until now it had been silently modifying the array.  The new behaviour
-is consistent with the behaviour of L<push|perlfunc/push ARRAY,LIST> and
-L<unshift|perlfunc/unshift ARRAY,LIST>.
-L<[perl #131000]|https://rt.perl.org/Public/Bug/Display.html?id=131000>
+XXX
 
 =back
 
-=head1 Acknowledgements
+=head1 Errata From Previous Releases
+
+=over 4
 
-Perl 5.27.5 represents approximately 4 weeks of development since Perl 5.27.4
-and contains approximately 29,000 lines of changes across 430 files from 20
-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 17,000 lines of changes to 340 .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 5.27.5:
+=head1 Obituary
 
-Aaron Crane, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
-Mannsåker, Dmitry Ulanov, Dominic Hargreaves, Father Chrysostomos, H.Merijn
-Brand, James E Keenan, John P. Linderman, John SJ Anderson, Lukas Mai, Nicolas
-R., Sawyer X, Smylers, Steve Hay, Tom Hukins, 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 v5.25.5..HEAD
 
 =head1 Reporting Bugs
 
diff --git a/vms/descrip_mms.template b/vms/descrip_mms.template
index 7e5325e90f..32794051a1 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]perl5275delta.pod
+PERLDELTA_CURRENT = [.pod]perl5276delta.pod
 
 $(PERLDELTA_CURRENT) : [.pod]perldelta.pod
 	Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT)
diff --git a/win32/GNUmakefile b/win32/GNUmakefile
index 2fe492860b..6d8553a18d 100644
--- a/win32/GNUmakefile
+++ b/win32/GNUmakefile
@@ -1635,7 +1635,7 @@ 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\perl5275delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5276delta.pod
 	$(MINIPERL) -I..\lib $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1732,7 +1732,7 @@ 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 \
-	    perl5275delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5276delta.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 c80f19b3bd..e7267222e6 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -1270,7 +1270,7 @@ 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\perl5275delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5276delta.pod
 	cd ..\win32
 	$(PERLEXE) $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
@@ -1369,7 +1369,7 @@ 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 \
-	    perl5275delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5276delta.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 42a0d38695..6e421a9526 100644
--- a/win32/makefile.mk
+++ b/win32/makefile.mk
@@ -1581,7 +1581,7 @@ 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\perl5275delta.pod
+	copy ..\pod\perldelta.pod ..\pod\perl5276delta.pod
 	$(MINIPERL) -I..\lib $(PL2BAT) $(UTILS)
 	$(MINIPERL) -I..\lib ..\autodoc.pl ..
 	$(MINIPERL) -I..\lib ..\pod\perlmodlib.PL -q ..
@@ -1679,7 +1679,7 @@ 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 \
-	    perl5275delta.pod perlaix.pod perlamiga.pod perlandroid.pod \
+	    perl5276delta.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 1209e2a172..1de149d12b 100644
--- a/win32/pod.mak
+++ b/win32/pod.mak
@@ -57,6 +57,7 @@ POD = perl.pod	\
 	perl5273delta.pod	\
 	perl5274delta.pod	\
 	perl5275delta.pod	\
+	perl5276delta.pod	\
 	perl561delta.pod	\
 	perl56delta.pod	\
 	perl581delta.pod	\
@@ -209,6 +210,7 @@ MAN = perl.man	\
 	perl5273delta.man	\
 	perl5274delta.man	\
 	perl5275delta.man	\
+	perl5276delta.man	\
 	perl561delta.man	\
 	perl56delta.man	\
 	perl581delta.man	\
@@ -360,6 +362,7 @@ HTML = perl.html	\
 	perl5273delta.html	\
 	perl5274delta.html	\
 	perl5275delta.html	\
+	perl5276delta.html	\
 	perl561delta.html	\
 	perl56delta.html	\
 	perl581delta.html	\
@@ -512,6 +515,7 @@ TEX = perl.tex	\
 	perl5273delta.tex	\
 	perl5274delta.tex	\
 	perl5275delta.tex	\
+	perl5276delta.tex	\
 	perl561delta.tex	\
 	perl56delta.tex	\
 	perl581delta.tex	\