Getting perldelta for 5.27.8 into shape.

1 files changed, 59 insertions, 222 deletions

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index ce35d7368a..30eb67fe34 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,9 +2,6 @@
 
 =head1 NAME
 
-[ 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 v5.27.8
 
 =head1 DESCRIPTION
@@ -15,18 +12,8 @@ release.
 If you are upgrading from an earlier release such as 5.27.6, first read
 L<perl5277delta>, which describes differences between 5.27.6 and 5.27.7.
 
-=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 ]
-
 =head2 Close-on-exec flag set atomically
 
 When opening a file descriptor, perl now generally opens it with its
@@ -84,24 +71,8 @@ may need to be changed to this:
     SV *
     bitop_handler (lobj, robj, swap, ...)
 
-=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 ]
-
 =head2 Smartmatch and switch reversion
 
 The changes to the experimental smart match operator (C<~~>) and switch
@@ -110,46 +81,8 @@ reverted due to the extent of the trouble caused to CPAN modules.
 It is expected that smartmatch will be changed again in the future,
 but preceded by some kind of explicit deprecation.
 
-=head1 Deprecations
-
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-
-=head2 Module removals
-
-XXX Remove this section if not applicable.
-
-The following modules will be removed from the core distribution in a
-future release, and will at that time need to be installed from CPAN.
-Distributions on CPAN which require these modules will need to list them as
-prerequisites.
-
-The core versions of these modules will now issue C<"deprecated">-category
-warnings to alert you to this fact.  To silence these deprecation warnings,
-install the modules in question from CPAN.
-
-Note that these are (with rare exceptions) fine modules that you are encouraged
-to continue to use.  Their disinclusion from core primarily hinges on their
-necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
-not usually on concerns over their design.
-
-=over
-
-=item XXX
-
-XXX Note that deprecated modules should be listed here even if they are listed
-as an updated module in the L</Modules and Pragmata> section.
-
-=back
-
-[ List each other deprecation as a =head2 entry ]
-
 =head1 Performance Enhancements
 
-XXX Changes which enhance performance without changing behaviour go here.
-There may well be none in a stable release.
-
-[ List each enhancement as an =item entry ]
-
 =over 4
 
 =item *
@@ -161,20 +94,6 @@ has been improved significantly except on EBCDIC platforms.
 
 =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.
-
-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
@@ -226,24 +145,12 @@ XXX
 XXX Changes to files in F<pod/> go here.  Consider grouping entries by
 file and be sure to link to the appropriate page, e.g. L<perlfunc>.
 
-=head2 New Documentation
-
-XXX Changes which create B<new> files in F<pod/> go here.
-
-=head3 L<XXX>
-
-XXX Description of the purpose of the new file here
-
 =head2 Changes to Existing Documentation
 
 We have attempted to update the documentation to reflect the changes
 listed in this document.  If you find any we have missed, send email
 to L<perlbug@perl.org|mailto:perlbug@perl.org>.
 
-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<perlembed>
@@ -268,216 +175,162 @@ or as a special case for C<ERRSV> simply:
 
 =back
 
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages.  For the complete list of
-diagnostic messages, see L<perldiag>.
-
-XXX New or changed warnings emitted by the core's C<C> code go here.  Also
-include any changes in L<perldiag> that reconcile it to the C<C> code.
-
-=head2 New Diagnostics
-
-XXX Newly added diagnostic messages go under here, separated into New Errors
-and New Warnings
-
-=head3 New Errors
+=head3 L<perlfunc>
 
 =over 4
 
 =item *
 
-L<Can't "goto" into a binary or list expression|perldiag/"Can't E<quot>gotoE<quot> into a binary or list expression">
-
-Use of C<goto> to jump into the parameter of a binary or list operator has
-been prohibited, to prevent crashes and stack corruption.  [perl #130936]
+Improve the documentation of C<each> with a slightly more
+explicit description of the sharing of iterator state, and with
+caveats regarding the fragility of while-each loops. [perl #132644]
 
 =back
 
-=head3 New Warnings
+=head3 L<perlfunc>, L<perlop>, L<perlsyn>
 
 =over 4
 
 =item *
 
-XXX L<message|perldiag/"message">
+Improve the documentation of while condition magic in various
+places. [perl #132644]
 
 =back
 
-=head2 Changes to Existing Diagnostics
-
-XXX Changes (i.e. rewording) of diagnostic messages go here
+=head3 L<perlrun>
 
 =over 4
 
 =item *
 
-XXX Describe change here
+Clarify the documentation of B<< -m >>. [perl #131518]
 
 =back
 
-=head1 Utility Changes
+=head1 Diagnostics
 
-XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
-Most of these are built within the directory F<utils>.
+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>.
 
-[ 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 New Diagnostics
 
-=head2 L<XXX>
+=head3 New Errors
 
 =over 4
 
 =item *
 
-XXX
-
-=back
+L<Can't "goto" into a binary or list expression|perldiag/"Can't E<quot>gotoE<quot> into a binary or list expression">
 
-=head1 Configuration and Compilation
+Use of C<goto> to jump into the parameter of a binary or list operator has
+been prohibited, to prevent crashes and stack corruption.  [perl #130936]
 
-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.
+=back
 
-[ List changes as an =item entry ].
+=head2 Changes to Existing Diagnostics
 
 =over 4
 
 =item *
 
-XXX
+The C<< Unable to flush stdout >> error message was missing a trailing
+newline. [debian #875361]
 
 =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 *
 
-XXX
+Allow override of watchdog timer count in F<re/pat_psycho.t>.
+
+This test can take a long time to run, so there is a timer to keep
+this in check (currently, 5 minutes). This commit adds checking
+the environment variable C<< PERL_TEST_TIME_OUT_FACTOR >>; if set,
+the time out setting is multiplied by its value.
 
 =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.
+=head2 Platform-Specific Notes
 
 =over 4
 
-=item XXX-some-platform
+=item Cygwin
 
-XXX
-
-=back
+A build with the quadmath library can now be done on Cygwin.
 
-=head2 Discontinued Platforms
+=item FreeBSD
 
-XXX List any platforms that this version of perl no longer compiles on.
+FreeBSD's F<< /usr/share/mk/sys.mk >> specifies C<< -O2 >> for
+architectures other than arm and mips. By default, compile perl
+with the same optimization levels.
 
-=over 4
+=item VMS
 
-=item XXX-some-platform
+Several fix-ups for F<configure.com>, marking function VMS has
+(or doesn't have).
 
-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.
+=head1 Selected Bug Fixes
 
 =over 4
 
-=item XXX-some-platform
-
-XXX
+=item *
 
-=back
+Fixed a use after free bug in pp_list introduced in 5.27.1.  [perl #131954]
 
-=head1 Internal Changes
+=item *
 
-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.
+Don't stringify numeric first arguments to
+C<< system() >> on Windows or VMS. [perl #132633]
 
-[ List each change as an =item entry ]
+=item * 
 
-=over 4
+Fixed an issue where the error C<< Scalar value @arrayname[0] better
+written as $arrayname >> would give an error C<< Cannot printf Inf with 'c' >>
+when arrayname starts with C<< Inf >>. [perl #132645]
 
 =item *
 
-XXX
-
-=back
+The Perl implementation of C<< getcwd() >> in C<< Cwd >> in the PathTools
+distribution now behaves the same as XS implementation on errors: it
+returns an error, and sets C<< $! >>. [perl #132648]
 
-=head1 Selected Bug Fixes
+=item *
 
-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>.
+Fixed argument counting in multiconcat when concatenating adjacent constants.
+[perl #132646]
 
-[ List each fix as an =item entry ]
+=item *
 
-=over 4
+Vivify array elements when putting them on the stack.
+Fixes [perl #8910] (reported in April 2002).
 
 =item *
 
-Fixed a use after free bug in pp_list introduced in 5.27.1.  [perl #131954]
+Fixed parsing of braced subscript after parens. Fixes [perl #8045]
+(reported in December 2001).
 
 =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 *
 
-XXX
-
-=item *
-
 The bugfix for [perl #2754] in Perl 5.27.7 turned out to cause so much
 trouble on CPAN [perl #132577] that it is being postponed.  The bug has
 been restored, so C<exit(0)> in a C<UNITCHECK> or C<CHECK> block now
@@ -487,22 +340,6 @@ will be fixed again for Perl 5.30.
 
 =back
 
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
-
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the perldelta of a previous release.
-
-=back
-
-=head1 Obituary
-
-XXX If any significant core contributor or member of the CPAN community has
-died, add a short obituary here.
-
 =head1 Acknowledgements
 
 XXX Generate this with: