Finalizing perldelta

1 files changed, 68 insertions, 257 deletions

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 0fe0f035ca..3001157c2c 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 v5.27.11
 
 =head1 DESCRIPTION
@@ -15,130 +12,96 @@ release.
 If you are upgrading from an earlier release such as 5.27.9, first read
 L<perl52710delta>, which describes differences between 5.27.9 and 5.27.10.
 
-=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 ]
+=head2 [CVE-2017-12837] Heap buffer overflow in regular expression compiler
 
-=head1 Incompatible Changes
+Compiling certain regular expression patterns with the case-insensitive
+modifier could cause a heap buffer overflow and crash perl.  This has now been
+fixed.
+L<[perl #131582]|https://rt.perl.org/Public/Bug/Display.html?id=131582>
 
-XXX For a release on a stable branch, this section aspires to be:
+=head2 [CVE-2017-12883] Buffer over-read in regular expression parser
 
-    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.
+For certain types of syntax error in a regular expression pattern, the error
+message could either contain the contents of a random, possibly large, chunk of
+memory, or could crash perl.  This has now been fixed.
+L<[perl #131598]|https://rt.perl.org/Public/Bug/Display.html?id=131598>
 
-[ List each incompatible change as a =head2 entry ]
+=head2 [CVE-2017-12814] C<$ENV{$key}> stack buffer overflow on Windows
 
-=head1 Deprecations
+A possible stack buffer overflow in the C<%ENV> code on Windows has been fixed
+by removing the buffer completely since it was superfluous anyway.
+L<[perl #131665]|https://rt.perl.org/Public/Bug/Display.html?id=131665>
 
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-
-=head2 Module removals
+=head1 Performance Enhancements
 
-XXX Remove this section if not applicable.
+=over 4
 
-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.
+=item *
 
-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.
+The start up overhead for creating regular expression patterns with
+Unicode properties (C<\p{...}>) has been greatly reduced in most cases.
 
-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.
+=back
 
-=over
+=head1 Modules and Pragmata
 
-=item XXX
+=head2 Updated Modules and Pragmata
 
-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.
+=over 4
 
-=back
+=item *
 
-[ List each other deprecation as a =head2 entry ]
+L<bytes> has been upgraded from version 1.05 to 1.06.
 
-=head1 Performance Enhancements
+=item *
 
-XXX Changes which enhance performance without changing behaviour go here.
-There may well be none in a stable release.
+L<Carp> has been upgraded from version 1.49 to 1.50.
 
-[ List each enhancement as an =item entry ]
+=item *
 
-=over 4
+L<Devel::PPPort> has been upgraded from version 3.39 to 3.40.
 
 =item *
 
-The start up overhead for creating regular expression patterns with
-Unicode properties (C<\p{...}>) has been greatly reduced in most cases.
-
-=back
+L<Exporter> has been upgraded from version 5.72 to 5.73.
 
-=head1 Modules and Pragmata
+=item *
 
-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.
+L<ExtUtils::Constant> has been upgraded from version 0.24 to 0.25.
 
-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.)
+=item *
 
-[ Within each section, list entries as an =item entry ]
+L<I18N::Langinfo> has been upgraded from version 0.16 to 0.17.
 
-=head2 New Modules and Pragmata
+=item *
 
-=over 4
+L<IO> has been upgraded from version 1.38 to 1.39.
 
 =item *
 
-XXX Remove this section if not applicable.
-
-=back
+L<Module::CoreList> has been upgraded from version 5.20180221 to 5.20180420.
 
-=head2 Updated Modules and Pragmata
+=item *
 
-=over 4
+L<POSIX> has been upgraded from version 1.83 to 1.84.
 
 =item *
 
-L<XXX> has been upgraded from version A.xx to B.yy.
+L<subs> has been upgraded from version 1.02 to 1.03.
 
-If there was something important to note about this change, include that here.
+=item *
 
-=back
+L<Time::HiRes> has been upgraded from version 1.9757 to 1.9759.
 
-=head2 Removed Modules and Pragmata
+=item *
 
-=over 4
+L<vars> has been upgraded from version 1.03 to 1.04.
 
 =item *
 
-XXX
+L<version> has been upgraded from version 0.9918 to 0.9923.
 
 =back
 
@@ -223,188 +186,36 @@ 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 *
-
-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 *
-
-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 *
-
-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 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 an =item entry ]
-
-=over 4
-
-=item *
-
-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 an =item entry ]
-
-=over 4
-
-=item *
-
-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 *
-
-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 5.27.11 represents approximately 4 weeks of development since Perl
+5.27.10 and contains approximately 440,000 lines of changes across 200 files
+from 21 authors.
 
-=back
+Excluding auto-generated files, documentation and release tools, there were
+approximately 440,000 lines of changes to 88 .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 5.27.11:
 
-XXX If any significant core contributor or member of the CPAN community has
-died, add a short obituary here.
+Aaron Crane, Alexandr Savca, Chris 'BinGOs' Williams, Dagfinn Ilmari
+Mannsåker, Daniel Dragan, David Mitchell, H.Merijn Brand, James E Keenan,
+John Peacock, Karl Williamson, Marc-Philip Werner, Nicholas Clark, Pali,
+Ricardo Signes, Sawyer X, Sergey Aleynikov, Steve Hay, Todd Rinaldo, 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 v5.27.10..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