New perldelta for 5.41.9

Author: steve-m-hay

MANIFEST

@@ -5749,6 +5749,7 @@ pod/perl5414delta.pod			Perl changes in version 5.41.4
 pod/perl5415delta.pod			Perl changes in version 5.41.5
 pod/perl5416delta.pod			Perl changes in version 5.41.6
 pod/perl5417delta.pod			Perl changes in version 5.41.7
+pod/perl5418delta.pod			Perl changes in version 5.41.8
 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

Makefile.SH

@@ -627,7 +627,7 @@ esac
 
 $spitshell >>$Makefile <<'!NO!SUBS!'
 
-perltoc_pod_prereqs = extra.pods pod/perl5418delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod
+perltoc_pod_prereqs = extra.pods pod/perl5419delta.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
 
@@ -1136,9 +1136,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc
 pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST
 	$(MINIPERL) pod/perlmodlib.PL -q
 
-pod/perl5418delta.pod: pod/perldelta.pod
-	$(RMS) pod/perl5418delta.pod
-	$(LNS) perldelta.pod pod/perl5418delta.pod
+pod/perl5419delta.pod: pod/perldelta.pod
+	$(RMS) pod/perl5419delta.pod
+	$(LNS) perldelta.pod pod/perl5419delta.pod
 
 extra.pods: $(MINIPERL_EXE)
 	-@test ! -f extra.pods || rm -f `cat extra.pods`

pod/.gitignore

@@ -47,7 +47,7 @@
 /roffitall
 
 # generated
-/perl5418delta.pod
+/perl5419delta.pod
 /perlapi.pod
 /perlintern.pod
 /perlmodlib.pod

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
+    perl5418delta       Perl changes in version 5.41.8
     perl5417delta       Perl changes in version 5.41.7
     perl5416delta       Perl changes in version 5.41.6
     perl5415delta       Perl changes in version 5.41.5

pod/perl5418delta.pod

@@ -0,0 +1,207 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5418delta - what is new for perl v5.41.8
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.41.7 release and the 5.41.8
+release.
+
+If you are upgrading from an earlier release such as 5.41.6, first read
+L<perl5417delta>, which describes differences between 5.41.6 and 5.41.7.
+
+=head1 Incompatible Changes
+
+=head2 Removed containing function references for functions without eval
+
+Perl 5.40 reintroduced unconditional references from functions to their
+containing functions to fix a bug introduced in Perl 5.18 that broke the
+special behaviour of C<eval EXPR> in package C<DB> which is used by the
+debugger.
+
+In some cases this change led to circular reference chains between closures and
+other existing references, resulting in memory leaks.
+
+This change has been reverted, fixing
+[L<GH #22547|https://github.com/Perl/perl5/issues/22547>] but re-breaking
+[L<GH #19370|https://github.com/Perl/perl5/issues/19370>].
+
+This means the reference loops won't occur, and that lexical variables and
+functions from enclosing functions may not be visible in the debugger.
+
+Note that calling C<eval EXPR> in a function unconditionally causes a function
+to reference its enclosing functions as it always has.
+
+=head1 Performance Enhancements
+
+=over 4
+
+=item *
+
+The peephole optimizer recognises the following zero-offset C<substr> patterns
+and swaps in a new dedicated operator (C<OP_SUBSTR_LEFT>).
+[L<GH #22785|https://github.com/Perl/perl5/issues/22785>]
+
+    substr($x, 0, ...)
+    substr($x, 0, ..., '')
+
+=back
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<B::Deparse> has been upgraded from version 1.81 to 1.82.
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.36 to 0.38.
+
+=item *
+
+L<Data::Dumper> has been upgraded from version 2.190 to 2.191.
+
+=item *
+
+L<DBM_Filter> has been upgraded from version 0.06 to 0.07.
+
+=item *
+
+L<experimental> has been upgraded from version 0.032 to 0.034.
+
+=item *
+
+L<ExtUtils::ParseXS> has been upgraded from version 3.56 to 3.57.
+
+=item *
+
+L<ExtUtils::Typemaps> has been upgraded from version 3.56 to 3.57.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20241220 to 5.20250120.
+
+=item *
+
+L<Opcode> has been upgraded from version 1.67 to 1.68.
+
+=item *
+
+L<Term::Table> has been upgraded from version 0.023 to 0.024.
+
+=item *
+
+L<Test::Simple> has been upgraded from version 1.302204 to 1.302207.
+
+=item *
+
+L<Time::Piece> has been upgraded from version 1.3401_01 to 1.35.
+
+=back
+
+=head1 Documentation
+
+=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>.
+
+=head1 Testing
+
+Tests were added and changed to reflect the other additions and changes in this
+release.
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+L<perlfunc/shmread> and L<perlfunc/shmwrite> are no longer limited to 31-bit
+values for their POS and SIZE arguments.
+[L<GH #22895|https://github.com/Perl/perl5/issues/22895>]
+
+=item *
+
+L<perlfunc/shmread> is now better behaved if VAR is not a plain string.  If VAR
+is a tied variable, it calls C<STORE> once; previously, it would also call
+C<FETCH>, but without using the result.  If VAR is a reference, the referenced
+entity has its refcount properly decremented when VAR is turned into a string;
+previously, it would leak memory.
+[L<GH #22898|https://github.com/Perl/perl5/issues/22898>]
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.41.8 represents approximately 4 weeks of development since Perl 5.41.7
+and contains approximately 8,800 lines of changes across 370 files from 17
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 6,800 lines of changes to 320 .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 5.41.8:
+
+Branislav Zahradník, Chad Granum, Dan Book, David Mitchell, Graham Knop,
+H.Merijn Brand, James E Keenan, Karl Williamson, Lukas Mai, Max Maischein, Paul
+Evans, Philippe Bruhat (BooK), Richard Leach, Sergei Zhmylev, Steve Hay, TAKAI
+Kousuke, 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<https://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