Merge branch 'release-5.27.1' into blead

2 files changed, 75 insertions, 239 deletions

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index a9e013409c..4de1d5e440 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 v5.27.1
 
 =head1 DESCRIPTION
@@ -15,18 +12,8 @@ release.
 If you are upgrading from an earlier release such as 5.26.0, first read
 L<perl5270delta>, which describes differences between 5.26.0 and 5.27.0.
 
-=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 L<C<delete>|perlfunc/delete EXPR> on key/value slices
 
 L<C<delete>|perlfunc/delete EXPR> can now be used on key/value slices,
@@ -35,13 +22,9 @@ L<[perl #131328]|https://rt.perl.org/Ticket/Display.html?id=131328>
 
 =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.
-
 =head2 Default Hash Function Change
 
-Perl 5.27.0 retires various older hash functions which are not viewed as
+Perl 5.27.1 retires various older hash functions which are not viewed as
 sufficiently secure for use in Perl. We now support four general purpose
 hash functions, Siphash (2-4 and 1-3 variants), and  Zaphod32, and StadtX
 hash. In addition we support SBOX32 (a form of tabular hashing) for hashing
@@ -71,14 +54,6 @@ in setting it higher than the default.
 
 =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 Comma-less variable lists in formats are no longer allowed
 
 Omitting the commas between variables passed to formats is no longer
@@ -95,7 +70,7 @@ This has been deprecated since Perl 5.24.
 
 =head2 Opening the same symbol as both a file and directory handle is no longer allowed
 
-Using open() and opendir() to associate both a filehandle and a dirhandle
+Using C<open()> and C<opendir()> to associate both a filehandle and a dirhandle
 to the same symbol (glob or scalar) has been deprecated since Perl 5.10.
 
 =head2 Use of bare C<< << >> to mean C<< <<"" >> is no longer allowed
@@ -122,7 +97,7 @@ This was deprecated in Perl 5.004.
 =head2 Use of strings with code points over 0xFF is not allowed for
 bitwise string operators
 
-Code points over 0xFF do not make sense for bitwise operators.
+Code points over C<0xFF> do not make sense for bitwise operators.
 
 =head2 Setting C<${^ENCODING}> to a defined value is now illegal
 
@@ -142,8 +117,6 @@ but has been broken for many years.
 
 =head1 Deprecations
 
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-
 =head2 Use of L<C<vec>|perlfunc/vec EXPR,OFFSET,BITS> on strings with code
 points above 0xFF is deprecated.
 
@@ -168,84 +141,32 @@ around.
 
 Note that these uses continue to raise a deprecation message.
 
-=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 a =item entry ]
-
 =over 4
 
 =item *
 
-File::Glob has been modified to remove unnecessary backtracking and
+L<File::Glob> has been modified to remove unnecessary backtracking and
 recursion, thanks to Russ Cox. See L<https://research.swtch.com/glob>
 for more details.
 
 =item *
 
-The ref() builtin is now much faster in boolean context, since it no
+The C<ref()> builtin is now much faster in boolean context, since it no
 longer bothers to construct a temporary string like C<Foo=ARRAY(0x134af48)>.
 
 =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 *
-
-XXX
-
-=back
-
 =head2 Updated Modules and Pragmata
 
 =over 4
 
 =item *
 
-L<XXX> has been upgraded from version A.xx to B.yy.
+L<Archive::Tar> has been upgraded from version 2.24 to 2.26.
 
 =item *
 
@@ -256,130 +177,97 @@ correctly:
     my $x :foo;  # used to deparse as
                  # 'attributes'->import('main', \$x, 'foo'), my $x;
 
-=back
-
-=head2 Removed Modules and Pragmata
-
-=over 4
-
 =item *
 
-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
+L<charnames> has been upgraded from version 1.44 to 1.45.
 
-XXX Changes which create B<new> files in F<pod/> go here.
+=item *
 
-=head3 L<XXX>
+L<Devel::PPPort> has been upgraded from version 3.35 to 3.36.
 
-XXX Description of the purpose of the new file here
+=item *
 
-=head2 Changes to Existing Documentation
+L<DirHandle> has been upgraded from version 1.04 to 1.05.
 
-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>.
+=item *
 
-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.
+L<ExtUtils::Install> has been upgraded from version 2.04 to 2.14.
 
-=head3 L<XXX>
+=item *
 
-=over 4
+L<ExtUtils::MakeMaker> has been upgraded from version 7.24 to 7.30.
 
 =item *
 
-XXX Description of the change here
+L<File::Path> has been upgraded from version 2.12_01 to 2.14.
 
-=back
+=item *
 
-=head1 Diagnostics
+L<Filter::Util::Call> has been upgraded from version 1.55 to 1.57.
 
-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>.
+=item *
 
-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.
+L<GDBM_File> has been upgraded from version 1.15 to 1.16.
 
-=head2 New Diagnostics
+=item *
 
-XXX Newly added diagnostic messages go under here, separated into New Errors
-and New Warnings
+L<Getopt::Long> has been upgraded from version 2.49 to 2.5.
 
-=head3 New Errors
+=item *
 
-=over 4
+L<if> has been upgraded from version 0.0606 to 0.0607.
 
 =item *
 
-XXX L<message|perldiag/"message">
+L<IO::Socket::IP> has been upgraded from version 0.38 to 0.39.
 
-=back
-
-=head3 New Warnings
+=item *
 
-=over 4
+L<IPC::Cmd> has been upgraded from version 0.96 to 0.98.
 
 =item *
 
-XXX L<message|perldiag/"message">
+L<JSON::PP> has been upgraded from version 2.27400_02 to 2.94.
 
-=back
+=item *
 
-=head2 Changes to Existing Diagnostics
+L<Locale::Codes> has been upgraded from version 3.42 to 3.52.
 
-XXX Changes (i.e. rewording) of diagnostic messages go here
+=item *
 
-=over 4
+L<Module::CoreList> has been upgraded from version 5.20170620 to 5.20170621.
 
 =item *
 
-XXX Describe change here
+L<mro> has been upgraded from version 1.20 to 1.21.
 
-=back
+=item *
 
-=head1 Utility Changes
+L<PerlIO::scalar> has been upgraded from version 0.26 to 0.27.
 
-XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
-Most of these are built within the directory F<utils>.
+=item *
 
-[ 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. ]
+L<PerlIO::via> has been upgraded from version 0.16 to 0.17.
 
-=head2 L<XXX>
+=item *
 
-=over 4
+L<Storable> has been upgraded from version 2.62 to 2.63.
 
 =item *
 
-XXX
-
-=back
+L<Test::Harness> has been upgraded from version 3.38 to 3.39.
 
-=head1 Configuration and Compilation
+=item *
 
-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.
+L<threads> has been upgraded from version 2.15 to 2.16.
 
-[ List changes as a =item entry ].
+=item *
 
-=over 4
+L<threads::shared> has been upgraded from version 1.56 to 1.57.
 
 =item *
 
-XXX
+L<version> has been upgraded from version 0.9917 to 0.9918.
 
 =back
 
@@ -405,29 +293,7 @@ on github mirrors.  [perl #123981]
 
 =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.
+=head2 Platform-Specific Notes
 
 =over 4
 
@@ -444,29 +310,8 @@ Support for compiling perl on Windows using Microsoft Visual Studio 2017
 
 =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 *
@@ -491,11 +336,6 @@ of the first variant character, if any are found.
 
 =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 *
@@ -505,8 +345,8 @@ longer would return that name flagged as UTF-8.  [perl #131263]
 
 =item *
 
-The perl sprintf() function (via the underlying C function
-Perl_sv_vcatpvfn_flags()) has been heavily reworked to fix many minor
+The perl C<sprintf()> function (via the underlying C function
+C<Perl_sv_vcatpvfn_flags()>) has been heavily reworked to fix many minor
 bugs, including the integer wrapping of large width and precision
 specifiers and potential buffer overruns. It has also been made faster in
 many cases.
@@ -523,43 +363,37 @@ C<$@>. For example:
 
 =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 a =item entry ]
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
+=head1 Acknowledgements
 
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the perldelta of a previous release.
+Perl 5.27.1 represents approximately 3 weeks of development since Perl 5.27.0
+and contains approximately 62,000 lines of changes across 510 files from 30
+authors.
 
-=back
+Excluding auto-generated files, documentation and release tools, there were
+approximately 55,000 lines of changes to 380 .pm, .t, .c and .h files.
 
-=head1 Obituary
+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 5.27.1:
 
-XXX If any significant core contributor has died, we've added a short obituary
-here.
+Aaron Crane, Abigail, Andy Dougherty, Andy Lester, Aristotle Pagaltzis, Chris
+'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan Collins,
+David Mitchell, Eric Herman, Eugen Konkov, Father Chrysostomos, Graham Knop,
+H.Merijn Brand, Jacques Germishuys, James E Keenan, Jerry D. Hedden, John
+Peacock, Karl Williamson, Ken Cotterill, Lukas Mai, Matthew Horsfall, Sawyer X,
+Steve Hay, Sullivan Beck, Thomas Sibley, Tony Cook, Yves Orton, Zefram.
 
-=head1 Acknowledgements
+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.
 
-XXX Generate this with:
+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.
 
-  perl Porting/acknowledgements.pl v5.25.5..HEAD
+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
 
diff --git a/pod/perlhist.pod b/pod/perlhist.pod
index 1fe24c7074..f301e4dc39 100644
--- a/pod/perlhist.pod
+++ b/pod/perlhist.pod
@@ -33,7 +33,8 @@ Matt S Trout, David Golden, Florian Ragwitz, Tatsuhiko Miyagawa,
 Chris C<BinGOs> Williams, Zefram, Ævar Arnfjörð Bjarmason, Stevan
 Little, Dave Rolsky, Max Maischein, Abigail, Jesse Luehrs, Tony Cook,
 Dominic Hargreaves, Aaron Crane, Aristotle Pagaltzis, Matthew Horsfall,
-Peter Martini, Sawyer X, Chad 'Exodist' Granum, and Renee Bäcker.
+Peter Martini, Sawyer X, Chad 'Exodist' Granum, Renee Bäcke,
+and Eric Herman.
 
 =head2 PUMPKIN?
 
@@ -617,6 +618,7 @@ the strings?).
  Sawyer X  5.26.0       2017-May-30
 
  Sawyer X  5.27.0       2017-May-31     The 5.27 development track
+ Eric      5.27.1       2017-Jun-20
 
 =head2 SELECTED RELEASE SIZES