=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 v5.17.10
+perldelta - what is new for perl v5.17.11
=head1 DESCRIPTION
-This document describes differences between the 5.17.9 release and the 5.17.10
+This document describes differences between the 5.17.10 release and the 5.17.11
release.
-If you are upgrading from an earlier release such as 5.17.8, first read
-L<perl5179delta>, which describes differences between 5.17.8 and 5.17.9.
-
-=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 ]
+If you are upgrading from an earlier release such as 5.17.9, first read
+L<perl51710delta>, which describes differences between 5.17.9 and 5.17.10.
=head1 Incompatible Changes
-=head2 Explicit rules for variable names and identifiers
-
-Due to an oversight, length-one variable names in 5.16 were completely
-unrestricted, and opened the door to several kinds of insanity. As of
-5.18, these now follow the rules of other identifiers, in addition
-to accepting characters that match the \p{POSIX_Punct} property.
-
-There are no longer any differences in the parsing of identifiers specified
-as $... or ${...}; previously, they were dealt with in different parts of
-the core, and so had slightly different behavior. For instance,
-C<${foo:bar}> was a legal variable name. Since they are now both parsed
-by the same code, that is no longer the case.
-
-[ List each incompatible change as a =head2 entry ]
-
-=head1 Deprecations
-
-XXX Any deprecated features, syntax, modules etc. should be listed here. In
-particular, deprecated modules should be listed here even if they are listed as
-an updated module in the L</Modules and Pragmata> section.
-
-[ List each deprecation as a =head2 entry ]
-
-=head2 PL_sv_objcount
-
-This interpreter-global variable used to track the total number of
-Perl objects in the interpreter. It is no longer maintained and will
-be removed altogether in Perl 5.20.
-
-=head1 Performance Enhancements
+Although no major incompatibilities have been introduced, the "switch" family
+of features have been marked experimental and will now emit warnings. These
+are: the C<~~> operator, C<given>, and C<when>.
-XXX Changes which enhance performance without changing behaviour go here.
-There may well be none in a stable release.
+=head1 Modules and Pragmata
-[ List each enhancement as a =item entry ]
+=head2 Updated Modules and Pragmata
=over 4
=item *
-XXX
+Fixed the merge of ExtUtils-MakeMaker 6.65_01 to remove an excluded
+file. This was causing a test failure on Win32 [perl #117477]
-=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>, which prints stub
-entries to STDOUT. Results can be pasted in place of the '=head2' entries
-below. 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 ]
+=item *
-=head2 New Modules and Pragmata
-
-=over 4
+B::Deparse has been upgraded from version 1.19 to 1.20, adding stub deparsing
+for lexical subroutines.
=item *
-XXX
-
-=back
+bigint has been upgraded from version 0.33 to 0.34.
-=head2 Updated Modules and Pragmata
+=item *
-=over 4
+CPAN has been upgraded from its trial 2.00 release to its final 2.00 release.
=item *
-L<Benchmark> has been upgraded from version 1.14 to 1.15.
+Exporter has been upgraded from version 5.67 to 5.68.
-This reverts (for now) a change in 1.14 whereby the "too few iterations"
-message became a warning on STDERR instead of being output on STDOUT. It's
-now on STDOUT again.
+=item *
-=back
+ExtUtils::CBuilder has been upgraded from version 0.280209 to 0.280210.
-=head2 Removed Modules and Pragmata
+=item *
-=over 4
+ExtUtils::MakeMaker has been upgraded from version 6.65_01 to 6.66.
=item *
-XXX
+IO has been upgraded from version 1.27 to 1.28.
-=back
+=item *
-=head1 Documentation
+overload has been upgraded from version 1.21 to 1.22.
-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>.
+=item *
-=head2 New Documentation
+Storable has been upgraded from version 2.40 to 2.41.
-XXX Changes which create B<new> files in F<pod/> go here.
+=item *
-=head3 L<XXX>
+warnings has been upgraded from version 1.17 to 1.18.
-XXX Description of the purpose of the new file here
+=back
=head2 Changes to Existing Documentation
-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.
+=head3 Asian-language documentation
-=head3 L<perlrebackslash/\N>
-
-=over 4
-
-=item *
-
-This feature is no longer experimental.
-
-=back
+The Asian-language documentation, previously stored in a few different
+encodings, have been transcoded to UTF-8.
=head1 Diagnostics
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
-
-=over 4
-
-=item *
-
-XXX L<message|perldiag/"message">
-
-=back
-
=head3 New Warnings
=over 4
=item *
-XXX L<message|perldiag/"message">
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-XXX Changes (i.e. rewording) of diagnostic messages go here
-
-=over 4
+L<Smartmatch is experimental|perldiag/"Smartmatch is experimental">
=item *
-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 directories F<utils> and F<x2p>.
-
-[ List utility changes as a =head3 entry for each utility and =item
-entries for each change
-Use L<XXX> with program names to get proper documentation linking. ]
-
-=head3 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 a =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.
-
-[ List each test improvement as a =item entry ]
-
-=over 4
+L<given is experimental|perldiag/"given is experimental">
=item *
-XXX
+L<when is experimental|perldiag/"when is experimental">
=back
=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.
-
-=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 a =item entry ]
-
=over 4
-=item *
-
-The new copy-on-write mechanism that was introduced in 5.17.7 has now been
-disabled by default, since it was felt that there were too many rough
-edges for the 5.18 release. It is expected that it will be enabled by
-default for 5.20.
-
-This change also re-enables PL_sawampersand by default.
+=item VMS
-It can be enabled in a perl build by running F<Configure> with
-B<-Accflags=-DPERL_NEW_COPY_ON_WRITE>, and we would encourage XS authors to
-try their code with such an enabled perl, and provide feedback.
-XXX need blurb, e.g. a reference to a new section in perlguts or perlxs
-explaining how XS authors should handle COW strings.
+As of 5.18.0, Perl on VMS can (at last) be built in and installed from a
+directory having dots in the name, so it is no longer necessary to rename the
+top-level source directory before building.
+The pertinent instructions have been removed from README.vms, so we also no
+longer need to update the version number that was embedded in those
+instructions.
=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 a =item entry ]
-
=over 4
-=item *
+=item Make vms.c's Perl_flex_fstat preserve errno on success
-XXX
+=item split's first argument is more consistently interpreted
-=back
+After some changes earlier in 5.17, C<split>'s behavior has been simplified: if
+the PATTERN argument evaluates to a literal string containing one space, it is
+treated the way that a I<literal> string containing one space once was.
-=head1 Known Problems
+=item Handle overloading properly in compile-time regex
-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.
+C<(?{…})> and C<qr> constant overloading did not play nicely together, and when
+C<qr> constant overloading was in effect, C<qr> constructs inside a C<(?{…})>
+construct were incorrectly interpreted. [perl #116823]
-[ List each fix as a =item entry ]
-
-=over 4
-
-=item *
+=back
-XXX
+=head1 Acknowledgements
-=back
+Perl 5.17.11 represents approximately 4 weeks of development since Perl 5.17.10
+and contains approximately 3,800 lines of changes across 130 files from 17
+authors.
-=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 5.17.11:
-XXX If any significant core contributor has died, we've added a short obituary
-here.
+Aaron Crane, Andy Dougherty, Brian Fraser, Chris 'BinGOs' Williams, Craig A.
+Berry, David Mitchell, François Perrad, James E Keenan, Jan Dubois, Karl
+Williamson, Leon Timmermans, Max Maischein, Moritz Lenz, Nicholas Clark,
+Ricardo Signes, Tony Cook, Yves Orton.
-=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 v5.17.9..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
https://perl5.git.perl.org / perl5.git / blobdiff