=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 v5.23.8
=head1 DESCRIPTION
If you are upgrading from an earlier release such as 5.23.6, first read
L<perl5237delta>, which describes differences between 5.23.6 and 5.23.7.
-=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 More fields provided to C<sigaction> callback with C<SA_SIGINFO>
When passing the C<SA_SIGINFO> flag to L<sigaction|POSIX/sigaction>, the
=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 ]
-
-=head1 Deprecations
-
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-
-=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.
+=head2 Set proper umask before calling C<mkstemp(3)>
-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.
+In 5.22 perl started setting umask to 0600 before calling C<mkstemp(3)>
+and restoring it afterwards. This wrongfully tells open(2) to strip
+the owner read and write bits from the given mode before applying it,
+rather than the intended negation of leaving only those bits in place.
-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.
+Systems that use mode 0666 in C<mkstemp(3)> (like old versions of
+glibc) createa a file with permissions 0066, leaving world read and
+write permissions regardless of current umask.
-=over
-
-=item XXX
+This has been fixed by using umask 0177 instead. [perl #127322]
-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.
+=head1 Incompatible Changes
-=back
+=head2 C<qr/\N{}/> now disallowed under C<use re "strict">
-[ List each other deprecation as a =head2 entry ]
+An empty C<\N{}> makes no sense, but for backwards compatibility is
+silently accepted as doing nothing. But now this is a fatal error under
+the experimental feature L<re/'strict' mode>.
=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 *
sub f{} f();
-=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
+On Win32, C<stat>ing or C<-X>ing a path, if the file or directory does not
+exist, is now 3.5x faster on a SSD (or any drive) than before.
=back
+=head1 Modules and Pragmata
+
=head2 Updated Modules and Pragmata
=over 4
=item *
-L<POSIX> has been upgraded from version 1.59 to 1.60.
+L<POSIX> has been upgraded from version 1.59 to 1.63.
It can now export constants for the C<code> value in the hash passed to the
L<sigaction|POSIX/sigaction> handler when using the C<SA_SIGINFO> flag.
-=back
+These previously deprecated functions are now removed: C<isalnum>,
+C<isalpha>, C<iscntrl>, C<isdigit>, C<isgraph>, C<islower>, C<isprint>,
+C<ispunct>, C<isspace>, C<isupper>, and C<isxdigit>.
-=head2 Removed Modules and Pragmata
+=item *
-=over 4
+L<Encode> has been upgraded from version 2.78 to 2.80.
=item *
-XXX
+L<Storable> has been upgraded from version 2.54 to 2.55.
-=back
-
-=head1 Documentation
+=item *
-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>.
+L<Time::HiRes> has been upgraded from version 1.9728 to 1.9730.
-=head2 New Documentation
+It can now export Linux-specific and FreeBSD-specific C<clock_gettime()>
+constants. It also now has emulation for OS X C<clock_nanosleep()>,
+C<clock_gettime()>, and C<clock_getres()>.
-XXX Changes which create B<new> files in F<pod/> go here.
+=item *
-=head3 L<XXX>
+L<DynaLoader> has been upgraded from version 1.37 to 1.38.
-XXX Description of the purpose of the new file here
+DynaLoader now always looks for bootstrap files having the same base name as
+the module for which the bootstrap code is being run. Previously, and only on
+platforms that use C<mod2fname> to produce unique loadable library names,
+L<DynaLoader> would look for the bootstrap file using a base name that matched
+the loadable library and not find it.
-=head2 Changes to Existing Documentation
+=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<PerlIO::encoding> has been upgraded from version 0.23 to 0.24.
-=head3 L<perlguts>
+=item *
-=over 4
+The PathTools module collection has been upgraded from version 3.62
+to 3.63.
=item *
-A new section has been added, L<perlguts/"Dynamic Scope and the Context
-Stack">, which explains how the perl context stack works.
+L<IPC::SysV> has been upgraded from version 2.04 to 2.05.
=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
+=head1 Documentation
-XXX Newly added diagnostic messages go under here, separated into New Errors
-and New Warnings
+=head2 Changes to Existing Documentation
-=head3 New Errors
+=head3 L<perlguts>
=over 4
=item *
-XXX L<message|perldiag/"message">
+A new section has been added, L<perlguts/"Dynamic Scope and the Context
+Stack">, which explains how the perl context stack works.
=back
-=head3 New Warnings
+=head3 L<perlmodlib>
=over 4
=item *
-XXX L<message|perldiag/"message">
+We now recommend contacting the module-authors list or PAUSE in seeking
+guidance on the naming of modules.
=back
-=head2 Changes to Existing Diagnostics
-
-XXX Changes (i.e. rewording) of diagnostic messages go here
-
-=over 4
+=head1 Diagnostics
-=item *
+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 Describe change here
+=head2 New Diagnostics
-=back
+=head3 New Errors
-=head1 Utility Changes
+=over 4
-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<Sequence (?PE<lt>... not terminated in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>
+|perldiag/"Sequence (?PE<lt>... not terminated in regex; marked by <-- HERE in mE<sol>%sE<sol>">
-=head2 L<XXX>
+=item *
-=over 4
+L<Sequence (?PE<gt>... not terminated in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>
+|perldiag/Sequence (?PE<gt>... not terminated in regex; marked by <-- HERE in mE<sol>%sE<sol>>
=item *
-XXX
+L<Empty \%c in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>
+|perldiag/Empty \%c in regex; marked by <-- HERE in mE<sol>%sE<sol>>
=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 ].
+=head3 New Warnings
=over 4
=item *
-XXX
+L<Assuming NOT a POSIX class since %s in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|
+perldiag/Assuming NOT a POSIX class since %s in regex; marked by <-- HERE in mE<sol>%sE<sol>>
=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 ]
+=head1 Configuration and Compilation
=over 4
=item *
-XXX
+The GNU Make makefile for Win32 now supports parallel builds. [perl #126632]
=item *
-The GNU Make makefile for Win32 now supports parallel builds. [perl #126632]
+You can now build perl with MSVC++ on Win32 using GNU Make. [perl #126632]
=item *
-You can now build perl with MSVC++ on Win32 using GNU Make. [perl #126632]
+Bison 3.0 is now supported.
=back
=back
-=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 Win32
=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 *
Various macros, which now consistently have a CX_ prefix, have been added:
- CX_CUR(), CX_LEAVE_SCOPE(), CX_POP()
+ CX_CUR(), CX_LEAVE_SCOPE(), CX_POP()
or renamed:
- CX_POP_SAVEARRAY(), CX_DEBUG(), CX_PUSHSUBST() ,CX_POPSUBST()
+ CX_POP_SAVEARRAY(), CX_DEBUG(), CX_PUSHSUBST(), CX_POPSUBST()
=item *
=back
-
=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 *
Fixed an operator precedence problem when C< castflags & 2> is true.
[perl #127474]
-=back
-
-=head1 Known Problems
+=item *
-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.
+Caching of DESTROY methods could result in a non-pointer or a
+non-STASH stored in the SvSTASH() slot of a stash, breaking the B
+STASH() method. The DESTROY method is now cached in the MRO metadata
+for the stash. [perl #126410]
-[ List each fix as a =item entry ]
+=item *
-=over 4
+The AUTOLOAD method is now called when searching for a DESTROY method,
+and correctly sets C<$AUTOLOAD> too. [perl #124387] [perl #127494]
=item *
-XXX
+Avoid parsing beyond the end of the buffer when processing a C<#line>
+directive with no filename. [perl #127334]
-=back
+=item *
-=head1 Errata From Previous Releases
+Perl now raises a warning when a regular expression pattern looks like
+it was supposed to contain a POSIX class, like C<qr/[[:alpha:]]/>, but
+there was some slight defect in its specification which causes it to
+instead be treated as a regular bracketed character class. An example
+would be missing the second colon in the above like this:
+C<qr/[[:alpha]]/>. This compiles to match a sequence of two characters.
+The second is C<"]">, and the first is any of: C<"[">, C<":">, C<"a">,
+C<"h">, C<"l">, or C<"p">. This is unlikely to be the intended
+meaning, and now a warning is raised. No warning is raised unless the
+specification is very close to one of the 14 legal POSIX classes. (See
+L<perlrecharclass/POSIX Character Classes>.)
+[perl #8904]
-=over 4
+=item *
+
+Certain regex patterns involving a complemented POSIX class in an
+inverted bracketed character class, and matching something else
+optionally would improperly fail to match. An example of one that could
+fail is C</qr/_?[^\Wbar]\x{100}/>. This has been fixed.
+[perl #127537]
=item *
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the perldelta of a previous release.
+Perl 5.22 added support to the C99 hexadecimal floating point notation,
+but sometimes misparses hex floats. This had been fixed.
+[perl #127183]
=back
-=head1 Obituary
+=head1 Acknowledgements
-XXX If any significant core contributor has died, we've added a short obituary
-here.
+Perl 5.23.8 represents approximately 4 weeks of development since Perl 5.23.7
+and contains approximately 30,000 lines of changes across 350 files from 23
+authors.
-=head1 Acknowledgements
+Excluding auto-generated files, documentation and release tools, there were
+approximately 14,000 lines of changes to 210 .pm, .t, .c and .h files.
+
+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 5.23.8:
+
+Aaron Crane, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
+Mannsåker, Daniel Dragan, David Mitchell, Ed J, Herbert Breunung, H.Merijn
+Brand, James E Keenan, Jarkko Hietaniemi, Karl Williamson, Lukas Mai, Niko
+Tyni, Pip Cet, Ricardo Signes, Sawyer X, Sisyphus, Stevan Little, Steve Hay,
+Todd Rinaldo, Tom Hukins, 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.
-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 v5.23.7..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