pod/perl5223delta.pod Perl changes in version 5.22.3
pod/perl5240delta.pod Perl changes in version 5.24.0
pod/perl5241delta.pod Perl changes in version 5.24.1
-pod/perl5250delta.pod Perl changes in version 5.25.0
-pod/perl52510delta.pod Perl changes in version 5.25.10
-pod/perl52511delta.pod Perl changes in version 5.25.11
-pod/perl52512delta.pod Perl changes in version 5.25.12
-pod/perl5251delta.pod Perl changes in version 5.25.1
-pod/perl5252delta.pod Perl changes in version 5.25.2
-pod/perl5253delta.pod Perl changes in version 5.25.3
-pod/perl5254delta.pod Perl changes in version 5.25.4
-pod/perl5255delta.pod Perl changes in version 5.25.5
-pod/perl5256delta.pod Perl changes in version 5.25.6
-pod/perl5257delta.pod Perl changes in version 5.25.7
-pod/perl5258delta.pod Perl changes in version 5.25.8
-pod/perl5259delta.pod Perl changes in version 5.25.9
pod/perl561delta.pod Perl changes in version 5.6.1
pod/perl56delta.pod Perl changes in version 5.6
pod/perl581delta.pod Perl changes in version 5.8.1
perlhist Perl history records
perldelta Perl changes since previous version
- perl52512delta Perl changes in version 5.25.12
- perl52511delta Perl changes in version 5.25.11
- perl52510delta Perl changes in version 5.25.10
- perl5259delta Perl changes in version 5.25.9
- perl5258delta Perl changes in version 5.25.8
- perl5257delta Perl changes in version 5.25.7
- perl5256delta Perl changes in version 5.25.6
- perl5255delta Perl changes in version 5.25.5
- perl5254delta Perl changes in version 5.25.4
- perl5253delta Perl changes in version 5.25.3
- perl5252delta Perl changes in version 5.25.2
- perl5251delta Perl changes in version 5.25.1
- perl5250delta Perl changes in version 5.25.0
perl5241delta Perl changes in version 5.24.1
perl5240delta Perl changes in version 5.24.0
perl5223delta Perl changes in version 5.22.3
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-[ this is a template for a new perldelta file. Any text flagged as XXX needs
-to be processed before release. ]
-
-perl5250delta - what is new for perl v5.25.0
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.24.0 release and the 5.25.0
-release.
-
-=head1 Known Problems
-
-=over 4
-
-=item *
-
-Some modules have been broken by the L<context stack rework|/Internal Changes>.
-These modules were relying on non-guaranteed implementation details in perl.
-Their maintainers have been informed, and should contact perl5-porters for
-advice if needed. Below is a subset of these modules:
-
-=over 4
-
-=item L<Algorithm::Permute>
-
-=item L<Coro>
-
-L<Coro> and perl v5.22.0 were already incompatible due to a change in the perl,
-and the reworking on the perl context stack creates a further incompatibility.
-perl5-porters has L<discussed the issue on the mailing
-list|http://www.nntp.perl.org/group/perl.perl5.porters/2016/05/msg236174.html>.
-
-=item L<Data::Alias>
-
-=item L<RPerl>
-
-=item L<Scope::Upper>
-
-=item L<TryCatch>
-
-=back
-
-=item *
-
-The module L<lexical::underscore> no longer works on perl v5.24.0, because perl
-no longer has a lexical C<$_>!
-
-=item *
-
-C<mod_perl> has been patched for compatibility for v5.22.0 and later but no
-release has been made. The relevant patch (and other changes) can be found in
-their source code repository, L<mirrored at
-GitHub|https://github.com/apache/mod_perl/commit/82827132efd3c2e25cc413c85af61bb63375da6e>.
-
-=back
-
-=head1 Acknowledgements
-
-XXX Generate this with:
-
- perl Porting/acknowledgements.pl v5.24.0..HEAD
-
-=head1 Reporting Bugs
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl52510delta - what is new for perl v5.25.10
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.9 release and the 5.25.10
-release.
-
-If you are upgrading from an earlier release such as 5.25.8, first read
-L<perl5259delta>, which describes differences between 5.25.8 and 5.25.9.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<B> has been upgraded from version 1.65 to 1.68.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.16 to 2.17.
-
-=item *
-
-L<feature> has been upgraded from version 1.46 to 1.47.
-
-=item *
-
-L<Getopt::Std> has been upgraded from version 1.11 to 1.12.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20170120 to 5.20170220.
-
-=item *
-
-L<open> has been upgraded from version 1.10 to 1.11.
-
-=item *
-
-L<PerlIO> has been upgraded from version 1.09 to 1.10.
-
-=item *
-
-L<Storable> has been upgraded from version 2.61 to 2.62.
-
-=item *
-
-L<Thread::Queue> has been upgraded from version 3.11 to 3.12.
-
-=item *
-
-L<threads> has been upgraded from version 2.12 to 2.13.
-
-=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>.
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-Use of unassigned code point or non-standalone grapheme for a delimiter will be a fatal error starting in Perl 5.30
-
-This was changed to drop a leading C<v> in C<v5.30>, so it uses the same
-style as other deprecation messages.
-
-=item *
-
-"\c%c" is more clearly written simply as "%s".
-
-It was decided to undeprecate the use of "\c%c", see L<http://www.nntp.perl.org/group/perl.perl5.porters/2017/02/msg242944.html>
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Windows
-
-=over 4
-
-=item *
-
-Support for compiling perl on Windows using Microsoft Visual Studio 2015
-(containing Visual C++ 14.0) has been added.
-
-This version of VC++ includes a completely rewritten C run-time library, some
-of the changes in which mean that work done to resolve a socket close() bug in
-perl #120091 and perl #118059 is not workable in its current state with this
-version of VC++. Therefore, we have effectively reverted that bug fix for
-VS2015 onwards on the basis that being able to build with VS2015 onwards is
-more important than keeping the bug fix. We may revisit this in the future to
-attempt to fix the bug again in a way that is compatible with VS2015.
-
-These changes do not affect compilation with GCC or with Visual Studio versions
-up to and including VS2013, i.e. the bug fix is retained (unchanged) for those
-compilers.
-
-Note that you may experience compatibility problems if you mix a perl built
-with GCC or VS E<lt>= VS2013 with XS modules built with VS2015, or if you mix a
-perl built with VS2015 with XS modules built with GCC or VS E<lt>= VS2013.
-Some incompatibility may arise because of the bug fix that has been reverted
-for VS2015 builds of perl, but there may well be incompatibility anyway because
-of the rewritten CRT in VS2015 (e.g. see discussion at
-http://stackoverflow.com/questions/30412951).
-
-=back
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-The C<op_class()> API function has been added. This is like the existing
-C<OP_CLASS()> macro, but can more accurately determine what struct an op
-has been allocated as. For example C<OP_CLASS()> might return
-C<OA_BASEOP_OR_UNOP> indicating that ops of this type are usually
-allocated as an C<OP> or C<UNOP>; while C<op_class()> will return
-C<OPclass_BASEOP> or C<OPclass_UNOP> as appropriate.
-
-=item *
-
-The output format of the C<op_dump()> function (as used by C<perl -Dx>)
-has changed: it now displays an "ASCII-art" tree structure, and shows more
-low-level details about each op, such as its address and class.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Attempting to use the deprecated variable C<$#> as the object in an
-indirect object method call could cause a heap use after free or
-buffer overflow. [perl #129274]
-
-=item *
-
-When checking for an indirect object method call in some rare cases
-the parser could reallocate the line buffer but then continue to use
-pointers to the old buffer. [perl #129190]
-
-=item *
-
-Supplying a glob as the format argument to L<perlfunc/formline> would
-cause an assertion failure. [perl #130722]
-
-=item *
-
-Code like C< $value1 =~ qr/.../ ~~ $value2 > would have the match
-converted into a qr// operator, leaving extra elements on the stack to
-confuse any surrounding expression. [perl #130705]
-
-=item *
-
-Since 5.24.0 in some obscure cases, a regex which included code blocks
-from multiple sources (e.g. via embedded via qr// objects) could end up
-with the wrong current pad and crash or give weird results. [perl #129881]
-
-=item *
-
-Occasionally C<local()>s in a code block within a patterns weren't being
-undone when the pattern matching backtracked over the code block.
-[perl #126697]
-
-=item *
-
-Using C<substr()> to modify a magic variable could access freed memory
-in some cases. [perl #129340]
-
-=item *
-
-Perl 5.25.9 was fixed so that under C<use utf8>, the entire Perl program
-is checked that the UTF-8 is wellformed. It turns out that several edge
-cases were missed, and are now fixed. [perl #126310] was the original
-ticket.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.10 represents approximately 4 weeks of development since Perl 5.25.9
-and contains approximately 12,000 lines of changes across 200 files from 25
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 6,700 lines of changes to 130 .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 5.25.10:
-
-Aaron Crane, Abigail, Andreas König, Andy Lester, Chris 'BinGOs' Williams,
-Christian Millour, Colin Newell, Dagfinn Ilmari Mannsåker, David Mitchell,
-Hugo van der Sanden, James E Keenan, Jarkko Hietaniemi, Jerry D. Hedden, John
-Lightsey, Karl Williamson, Neil Bowers, Pali, Renee Baecker, Sawyer X, Sergey
-Aleynikov, Steffen Müller, Steve Hay, Tony Cook, Yves Orton, Zefram.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl52511delta - what is new for perl v5.25.11
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.10 release and the 5.25.11
-release.
-
-If you are upgrading from an earlier release such as 5.25.9, first read
-L<perl52510delta>, which describes differences between 5.25.9 and 5.25.10.
-
-=head1 Notice
-
-This release includes two important updates:
-
-=over 4
-
-=item * Turning on the removal of C<.> in C<@INC>
-
-=item * Providing a warning when C<do> is used on a file in C<.>
-
-=back
-
-=head1 Security
-
-=head2 Remove current dir (C<.>) from C<@INC>
-
-For security reasons, C<@INC> no longer contains the default directory
-(C<.>).
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.070 to 2.074.
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.070 to 2.074.
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.27 to 0.28.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.33 to 3.34.
-
-=item *
-
-L<ExtUtils::Typemaps> has been upgraded from version 3.33 to 3.34.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.66 to 3.67.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20170220 to 5.20170320.
-
-=item *
-
-L<Pod::Perldoc> has been upgraded from version 3.27 to 3.28.
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.36_01 to 3.38.
-
-=item *
-
-L<threads> has been upgraded from version 2.13 to 2.15.
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.54 to 1.55.
-
-=item *
-
-L<VMS::Stdio> has been upgraded from version 2.42 to 2.41.
-
-=back
-
-=head1 Diagnostics
-
-=head2 New Diagnostics
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-Since C<.> is removed from C<@INC>, C<do> will now trigger a warning
-recommending on fixing the C<do> statement.
-
-L<do "%s" failed, '.' is no longer in @INC|perldiag/"do "%s" failed, '.' is no longer in @INC">
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-C<DEFAULT_INC_EXCLUDES_DOT> has been turned on as default.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-C< $-{$name} > would leak an C<AV> on each access if the regular
-expression had no named captures. The same applies to access to any
-hash tied with L<Tie::Hash::NamedCapture> and C<< all =E<gt> 1 >>. [perl
-#130822]
-
-=back
-
-=head1 Obituary
-
-It is with great sadness we note that Kip Hampton passed away. Probably
-best known as the author of the Perl & XML column on XML.com, he was a
-core contributor to AxKit, an XML server platform that became an Apache
-Foundation project. He was a frequent speaker in the early days at
-OSCON, and most recently at YAPC::NA in Madison. He was frequently on
-irc.perl.org as `ubu`, generally in the #axkit-dahut community, the
-group responsible for YAPC::NA Asheville in 2011.
-
-Kip and his constant contributions to the community will be greatly missed.
-
-=head1 Acknowledgements
-
-
-Perl 5.25.11 represents approximately 4 weeks of development since Perl 5.25.10
-and contains approximately 4,900 lines of changes across 240 files from 21
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 2,200 lines of changes to 170 .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 5.25.11:
-
-Aaron Crane, Andy Lester, Chris 'BinGOs' Williams, Craig A. Berry, Dave Cross,
-David Golden, David Mitchell, Dominic Hargreaves, H.Merijn Brand, Hugo van der
-Sanden, James E Keenan, Jarkko Hietaniemi, Jerry D. Hedden, Karl Williamson,
-Leon Timmermans, Matthew Horsfall, Renee Baecker, Sawyer X, Shlomi Fish, Steve
-Hay, 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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl52512delta - what is new for perl v5.25.12
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.11 release and the 5.25.12
-release.
-
-If you are upgrading from an earlier release such as 5.25.10, first read
-L<perl52511delta>, which describes differences between 5.25.10 and 5.25.11.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<base> has been upgraded from version 2.24 to 2.25.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.17 to 2.18.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.41 to 1.42.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20170320 to
-5.20170420.
-
-=item *
-
-L<Safe> has been upgraded from version 2.39 to 2.40.
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.55 to 1.56.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.26 to 0.27.
-
-=back
-
-=head1 Diagnostics
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-Since C<.> is now removed from C<@INC> by default, C<do> will now trigger
-a warning recommending to fix the C<do> statement:
-
-L<do "%s" failed, '.' is no longer in @INC|perldiag/do "%s" failed, '.' is no longer in @INC; did you mean do ".E<sol>%s"?>
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-When a C<require> fails, we now do not provide C<@INC> when the C<require>
-is for a file instead of a module.
-
-=item *
-
-When C<@INC> is not scanned for a C<require> call, we no longer display
-C<@INC> to avoid confusion.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.12 represents approximately 4 weeks of development since Perl 5.25.11
-and contains approximately 1,700 lines of changes across 150 files from 8
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 700 lines of changes to 73 .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 5.25.12:
-
-Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, David Mitchell, James E
-Keenan, Jarkko Hietaniemi, Karl Williamson, Pali, Sawyer X.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5251delta - what is new for perl v5.25.1
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.0 release and the 5.25.1
-release.
-
-If you are upgrading from an earlier release such as 5.24.0, first read
-L<perl5250delta>, which describes differences between 5.24.0 and 5.25.0.
-
-=head1 Core Enhancements
-
-=head2 POSIX::tmpnam() has been removed
-
-The fundamentally unsafe C<tmpnam()> interface was deprecated in
-Perl 5.22.0 and has now been removed. In its place you can use
-for example the L<File::Temp> interfaces.
-
-=head2 require ::Foo::Bar is now illegal.
-
-Formerly, C<require ::Foo::Bar> would try to read F</Foo/Bar.pm>. Now any
-bareword require which starts with a double colon dies instead.
-
-=head2 Unescaped literal C<"{"> characters in regular expression
-patterns are no longer permissible
-
-You have to now say something like C<"\{"> or C<"[{]"> to specify to
-match a LEFT CURLY BRACKET. This will allow future extensions to the
-language. This restriction is not enforced, nor are there current plans
-to enforce it, if the C<"{"> is the first character in the pattern.
-
-These have been deprecated since v5.16, with a deprecation message
-displayed starting in v5.22.
-
-=head2 Literal control character variable names are no longer permissible
-
-A variable name may no longer contain a literal control character under
-any circumstances. These previously were allowed in single-character
-names on ASCII platforms, but have been deprecated there since Perl
-v5.20. This affects things like C<$I<\cT>>, where I<\cT> is a literal
-control (such as a C<NAK> or C<NEGATIVE ACKNOWLEDGE> character) in the
-source code.
-
-=head2 C<qr//xx> is no longer permissible
-
-Using more than one C</x> regular expression pattern modifier on a
-single pattern is now forbidden. This is to allow a future enhancement
-to the language. This usage has been deprecated since v5.22.
-
-=head2 C<NBSP> is no longer permissible in C<\N{...}>
-
-The name of a character may no longer contain non-breaking spaces. It
-has been deprecated to do so since Perl v5.22.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Bareword constant strings are now permitted to take part in constant
-folding. They were originally exempted from constant folding in August 1999,
-during the development of Perl 5.6, to ensure that C<use strict "subs">
-would still apply to bareword constants. That has now been accomplished a
-different way, so barewords, like other constants, now gain the performance
-benefits of constant folding.
-
-This also means that void-context warnings on constant expressions of
-barewords now report the folded constant operand, rather than the operation;
-this matches the behaviour for non-bareword constants.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.04 to 2.08.
-
-=item *
-
-L<Carp> has been upgraded from version 1.40 to 1.41.
-
-=item *
-
-L<charnames> has been upgraded from version 1.43 to 1.44.
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.25 to 0.26.
-
-=item *
-
-L<DB_File> has been upgraded from version 1.835 to 1.838.
-
-=item *
-
-L<Digest::MD5> has been upgraded from version 2.54 to 2.55.
-
-=item *
-
-L<IPC::Cmd> has been upgraded from version 0.92 to 0.94.
-
-=item *
-
-L<IPC::SysV> has been upgraded from version 2.06_01 to 2.07.
-
-=item *
-
-L<List::Util> has been upgraded from version 1.42_02 to 1.45_01.
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.37 to 3.38.
-
-=item *
-
-L<Locale::Maketext> has been upgraded from version 1.26 to 1.27.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20160507 to 5.20160520.
-
-=item *
-
-L<Module::Metadata> has been upgraded from version 1.000031 to 1.000032.
-
-=item *
-
-L<perlfaq> has been upgraded from version 5.021010 to 5.021011.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.65 to 1.69. This remedies several
-defects in making its symbols exportable. [perl #127821]
-The C<POSIX::tmpnam()> interface has been removed,
-see L</"POSIX::tmpnam() has been removed">.
-Trying to import POSIX subs that have no real implementations
-(like C<POSIX::atend()>) now fails at import time, instead of
-waiting until runtime.
-
-=item *
-
-L<re> has been upgraded from version 0.32 to 0.33.
-
-=item *
-
-L<Scalar::Util> has been upgraded from version 1.42_02 to 1.45_01.
-
-=item *
-
-L<Sys::Syslog> has been upgraded from version 0.33 to 0.34.
-
-=item *
-
-L<Term::ANSIColor> has been upgraded from version 4.04 to 4.05.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.001014 to 1.302015.
-
-=item *
-
-L<threads> has been upgraded from version 2.07 to 2.08. Compatibility
-with 5.8 has been restored.
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.51 to 1.52.
-Compatibility with 5.8 has been restored.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=over 4
-
-=item *
-
-Fixed link to Crosby paper on hash complexity attack in L<perlsec>.
-
-=back
-
-=head1 Diagnostics
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Bareword in require contains "%s"|perldiag/"Bareword in require contains "%s"">
-
-=item *
-
-L<Bareword in require maps to empty filename|perldiag/"Bareword in require maps to empty filename">
-
-=item *
-
-L<Bareword in require maps to disallowed filename "%s"|perldiag/"Bareword in require maps to disallowed filename "%s"">
-
-=item *
-
-L<Bareword in require must not start with a double-colon: "%s"|perldiag/"Bareword in require must not start with a double-colon: "%s"">
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-Code like C<$x = $x . "a"> was incorrectly failing to yield a
-L<use of uninitialized value|perldiag/"Use of uninitialized value%s">
-warning when C<$x> was a lexical variable with an undefined value. That has
-now been fixed. [perl #127877]
-
-=item *
-
-When the error "Experimental push on scalar is now forbidden" is raised for
-the hash functions C<keys>, C<each>, and C<values>, it is now followed by
-the more helpful message, "Type of arg 1 to whatever must be hash or
-array". [perl #127976]
-
-=item *
-
-C<undef *_; shift> or C<undef *_; pop> inside a subroutine, with no
-argument to C<shift> or C<pop>, began crashing in Perl 5.14.0, but has now
-been fixed.
-
-=item *
-
-C<< "string$scalar-E<gt>$*" >> now correctly prefers concat overloading to
-string overloading if C<< $scalar-E<gt>$* >> returns an overloaded object,
-bringing it into consistency with C<$$scalar>.
-
-=item *
-
-C<< /@0{0*-E<gt>@*/*0 >> and similar contortions used to crash, but no longer
-do, but merely produce a syntax error. [perl #128171]
-
-=item *
-
-C<do> or C<require> with a reference or typeglob which, when stringified,
-contains a null character started crashing in Perl 5.20.0, but has now been
-fixed. [perl #128182]
-
-=back
-
-=head1 Utility Changes
-
-=head2 L<perlbug>
-
-=over 4
-
-=item *
-
-Long lines in the message body are now wrapped at 900 characters, to stay
-well within the 1000-character limit imposed by SMTP mail transfer agents.
-This is particularly likely to be important for the list of arguments to
-C<Configure>, which can readily exceed the limit if, for example, it names
-several non-default installation paths. This change also adds the first unit
-tests for perlbug. [perl #128020]
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-C<Configure> now builds C<miniperl> and C<generate_uudmap> if you
-invoke it with C<-Dusecrosscompiler> but not C<-Dtargethost=somehost>.
-This means you can supply your target platform C<config.sh>, generate
-the headers and proceed to build your cross-target perl. [perl #127234]
-
-=item *
-
-Builds with C<-Accflags=-DPERL_TRACE_OPS> now only dump the operator
-counts when the environment variable C<PERL_TRACE_OPS> to be set to a
-non-zero integer. This allows C<make test> to pass on such a build.
-
-=item *
-
-When building with GCC 6 and link-time optimization (the C<-flto> option to
-C<gcc>), C<Configure> was treating all probed symbols as present on the
-system, regardless of whether they actually exist. This has been fixed.
-[perl #128131]
-
-=item *
-
-The F<t/test.pl> library is used for internal testing of Perl itself, and
-also copied by several CPAN modules. Some of those modules must work on
-older versions of Perl, so F<t/test.pl> must in turn avoid newer Perl
-features. Compatibility with Perl 5.8 was inadvertently removed some time
-ago; it has now been restored. [perl #128052]
-
-=item *
-
-The build process no longer emits an extra blank line before building each
-"simple" extension (those with only F<*.pm> and F<*.pod> files).
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Perl is now built with the C<PERL_OP_PARENT> compiler define enabled by
-default. To disable it, use the C<PERL_NO_OP_PARENT> compiler define.
-This flag alters how the C<op_sibling> field is used in C<OP> structures,
-and has been available optionally since perl 5.22.0.
-
-See L<perl5220delta/"Internal Changes"> for more details of what this
-build option does.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Expressions containing an C<&&> or C<||> operator (or their synonyms C<and>
-and C<or>) were being compiled incorrectly in some cases. If the left-hand
-side consisted of either a negated bareword constant or a negated C<do {}>
-block containing a constant expression, and the right-hand side consisted of
-a negated non-foldable expression, one of the negations was effectively
-ignored. The same was true of C<if> and C<unless> statement modifiers,
-though with the left-hand and right-hand sides swapped. This long-standing
-bug has now been fixed. [perl #127952]
-
-=item *
-
-C<reset> with an argument no longer crashes when encountering stash entries
-other than globs. [perl #128106]
-
-=item *
-
-Assignment of hashes to, and deletion of, typeglobs named C<*::::::> no
-longer causes crashes. [perl #128086]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.1 represents approximately 2 weeks of development since Perl 5.25.0
-and contains approximately 46,000 lines of changes across 630 files from 24
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 40,000 lines of changes to 510 .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 5.25.1:
-
-Aaron Crane, Andreas Voegele, Chad Granum, Chris 'BinGOs' Williams, Craig A.
-Berry, David Mitchell, Doug Bell, Father Chrysostomos, H.Merijn Brand, Hugo van
-der Sanden, Jarkko Hietaniemi, Jerry D. Hedden, Jim Cromie, John Lightsey,
-Karen Etheridge, Karl Williamson, Lukas Mai, Maxwell Carey, Nicholas Clark,
-Niko Tyni, Ricardo Signes, Sawyer X, Tony Cook, Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the articles recently
-posted to the comp.lang.perl.misc newsgroup and the perl bug database at
-L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5252delta - what is new for perl v5.25.2
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.1 release and the 5.25.2
-release.
-
-If you are upgrading from an earlier release such as 5.25.0, first read
-L<perl5251delta>, which describes differences between 5.25.0 and 5.25.1.
-
-=head1 Core Enhancements
-
-=head2 Perl can now do default collation in UTF-8 locales on platforms
-that support it
-
-Some platforms natively do a reasonable job of collating and sorting in
-UTF-8 locales. Perl now works with those. For portability and full
-control, L<Unicode::Collate> is still recommended, but now you may
-not need to do anything special to get good-enough results, depending on
-your application. See
-L<perllocale/Category C<LC_COLLATE>: Collation: Text Comparisons and Sorting>.
-
-=head2 Better locale collation of strings containing embedded C<NUL>
-characters
-
-In locales that have multi-level character weights, these are now
-ignored at the higher priority ones. There are still some gotchas in
-some strings, though. See
-L<perllocale/Collation of strings containing embedded C<NUL> characters>.
-
-=head2 Lexical subroutines are no longer experimental
-
-Using the C<lexical_subs> feature no longer emits a warning. Existing code that disables the C<experimental::lexical_subs> warning category that the
-feature previously used will continue to work. The C<lexical_subs> feature
-has no effect; all Perl code can use lexical subroutines, regardless of
-what feature declarations are in scope.
-
-=head2 C<CORE> subroutines for hash and array functions callable via
-reference
-
-The hash and array functions in the C<CORE> namespace--C<keys>, C<each>,
-C<values>, C<push>, C<pop>, C<shift>, C<unshift> and C<splice>--, can now
-be called with ampersand syntax (C<&CORE::keys(\%hash>) and via reference
-(C<< my $k = \&CORE::keys; $k->(\%hash) >>). Previously they could only be
-used when inlined.
-
-=head1 Security
-
-=head2 C<-Di> switch is now required for PerlIO debugging output
-
-Previously PerlIO debugging output would be sent to the file specified
-by the C<PERLIO_DEBUG> environment variable if perl wasn't running
-setuid and the C<-T> or C<-t> switches hadn't been parsed yet.
-
-If perl performed output at a point where it hadn't yet parsed its
-switches this could result in perl creating or overwriting the file
-named by C<PERLIO_DEBUG> even when the C<-T> switch had been supplied.
-
-Perl now requires the C<-Di> switch to produce PerlIO debugging
-output. By default this is written to C<stderr>, but can optionally
-be redirected to a file by setting the C<PERLIO_DEBUG> environment
-variable.
-
-If perl is running setuid or the C<-T> switch has supplied
-C<PERLIO_DEBUG> is ignored and the debugging output is sent to
-C<stderr> as for any other C<-D> switch.
-
-=head1 Incompatible Changes
-
-=head2 C<keys> returned from an lvalue subroutine
-
-C<keys> returned from an lvalue subroutine can no longer be assigned
-to in list context.
-
- sub foo : lvalue { keys(%INC) }
- (foo) = 3; # death
- sub bar : lvalue { keys(@_) }
- (bar) = 3; # also an error
-
-This makes the lvalue sub case consistent with C<(keys %hash) = ...> and
-C<(keys @_) = ...>, which are also errors. [perl #128187]
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<CPAN> has been upgraded from version 2.11 to 2.14.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.23 to 1.24.
-
-=item *
-
-L<diagnostics> has been upgraded from version 1.34 to 1.35.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.38 to 1.39.
-
-=item *
-
-L<ExtUtils::MakeMaker> has been upgraded from version 7.10_01 to 7.18.
-
-=item *
-
-L<ExtUtils::Miniperl> has been upgraded from version 1.05 to 1.06.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.31 to 3.32.
-
-=item *
-
-L<ExtUtils::Typemaps> has been upgraded from version 3.31 to 3.32.
-
-=item *
-
-L<feature> has been upgraded from version 1.43 to 1.44.
-
-=item *
-
-L<File::Copy> has been upgraded from version 2.31 to 2.32.
-
-=item *
-
-L<File::Glob> has been upgraded from version 1.26 to 1.27.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.63 to 3.64.
-
-=item *
-
-L<FileHandle> has been upgraded from version 2.02 to 2.03.
-
-=item *
-
-L<Getopt::Long> has been upgraded from version 2.48 to 2.49.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.056 to 0.058.
-
-=item *
-
-L<JSON::PP> has been upgraded from version 2.27300 to 2.27400.
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.38 to 3.39.
-
-=item *
-
-L<Module::CoreList> has been upgraded from 5.20160520 to 5.20160620.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.34 to 1.35.
-
-=item *
-
-L<Pod::Checker> has been upgraded from version 1.60 to 1.73.
-
-=item *
-
-L<Pod::Functions> has been upgraded from version 1.10 to 1.11.
-
-=item *
-
-L<Pod::Usage> has been upgraded from version 1.68 to 1.69.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.69 to 1.70.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302015 to 1.302026.
-
-=item *
-
-L<Thread::Queue> has been upgraded from version 3.09 to 3.11.
-
-=item *
-
-L<threads> has been upgraded from version 2.08 to 2.09.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9733 to 1.9734.
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.64 to 0.65.
-
-=item *
-
-L<VMS::DCLsym> has been upgraded from version 1.06 to 1.07.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlcommunity>
-
-=over 4
-
-=item *
-
-All references to Usenet have been removed.
-
-=back
-
-=head3 L<perldelta>
-
-=over 4
-
-=item *
-
-All references to Usenet have been removed.
-
-=back
-
-=head3 L<perllocale>
-
-=over 4
-
-=item *
-
-Document NUL collation handling.
-
-=back
-
-=head3 L<perlmodinstall>
-
-=over 4
-
-=item *
-
-All references to Usenet have been removed.
-
-=back
-
-=head3 L<perlmodlib>
-
-=over 4
-
-=item *
-
-Updated the mirror list.
-
-=item *
-
-All references to Usenet have been removed.
-
-=back
-
-=head3 L<perlnewmod>
-
-=over 4
-
-=item *
-
-All references to Usenet have been removed.
-
-=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>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<Version control conflict marker|perldiag/"Version control conflict marker">
-
-(F) The parser found a line starting with C<E<lt><<<<<<>,
-C<E<gt>E<gt>E<gt>E<gt>E<gt>E<gt>E<gt>>, or C<=======>. These may be left by a
-version control system to mark conflicts after a failed merge operation.
-
-=item *
-
-L<%s: command not found|perldiag/"%s: command not found">
-
-(A) You've accidentally run your script through B<bash> or another shell
-instead of Perl. Check the #! line, or manually feed your script into
-Perl yourself. The #! line at the top of your file could look like:
-
- #!/usr/bin/perl
-
-=item *
-
-L<%s: command not found: %s|perldiag/"%s: command not found: %s">
-
-(A) You've accidentally run your script through B<zsh> or another shell
-instead of Perl. Check the #! line, or manually feed your script into
-Perl yourself. The #! line at the top of your file could look like:
-
- #!/usr/bin/perl
-
-=item *
-
-L<Unescaped left brace in regex is deprecated here, passed through in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"Unescaped left brace in regex is deprecated here, passed through in regex; marked by S<<-- HERE> in m/%s/">
-
-Unescaped left braces are already illegal in some contexts in regular
-expression patterns, but, due to an oversight, no deprecation warning
-was raised in other contexts where they are intended to become illegal.
-This warning is now raised in these contexts.
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-L<Unescaped left brace in regex is illegal here in regex; marked by S<<-- HERE> in mE<sol>%sE<sol>|perldiag/"Unescaped left brace in regex is illegal here in regex; marked by S<<-- HERE> in m/%s/">
-
-The word "here" has been added to the message that was raised in
-v5.25.1. This is to indicate that there are contexts in which unescaped
-left braces are not (yet) illegal.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-F<make_ext.pl> no longer updates a module's F<pm_to_blib> file when no
-files require updates. This could cause dependencies, F<perlmain.c>
-in particular, to be rebuilt unnecessarily. [perl #126710]
-
-=item *
-
-The output of C<perl -V> has been reformatted so that each configuration
-and compile-time option is now listed one per line, to improve
-readability.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-F<t/harness> now tries really hard not to run tests outside of the Perl
-source tree. [perl #124050]
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Perl no longer panics when switching into some locales on machines with
-buggy C<strxfrm()> implementations in their libc. [perl #121734]
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-C< until ($x = 1) { ... } > and C< ... until $x = 1 > now properly
-warn when syntax warnings are enabled. [perl #127333]
-
-=item *
-
-socket() now leaves the error code returned by the system in C<$!> on
-failure. [perl #128316]
-
-=item *
-
-Assignment variants of any bitwise ops under the C<bitwise> feature would
-crash if the left-hand side was an array or hash. [perl #128204]
-
-=item *
-
-C<require> followed by a single colon (as in C<foo() ? require : ...> is
-now parsed correctly as C<require> with implicit $_, rather than
-C<require "">. [perl #128307]
-
-=item *
-
-Scalar C<keys %hash> can now be assigned to consistently in all scalar
-lvalue contexts. Previously it worked for some contexts but not others.
-
-=item *
-
-List assignment to C<vec> or C<substr> with an array or hash for its first
-argument used to result in crashes or "Can't coerce" error messages at run
-time, unlike scalar assignment, which would give an error at compile time.
-List assignment now gives a compile-time error, too. [perl #128260]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.2 represents approximately 4 weeks of development since Perl 5.25.1
-and contains approximately 32,000 lines of changes across 430 files from 28
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 27,000 lines of changes to 300 .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 5.25.2:
-
-Aaron Crane, Andreas König, Andy Lester, Chad Granum, Chase Whitener, Chris
-'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan Collins,
-David Mitchell, Dominic Hargreaves, Ed Avis, Father Chrysostomos, H.Merijn
-Brand, Ivan Pozdeev, James E Keenan, Jarkko Hietaniemi, Jerry D. Hedden, Jim
-Cromie, Karl Williamson, Lukas Mai, Matthew Horsfall, Misty De Meo, Samuel
-Thibault, Sawyer X, Sullivan Beck, Tony Cook, Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5253delta - what is new for perl v5.25.3
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.2 release and the 5.25.3
-release.
-
-If you are upgrading from an earlier release such as 5.25.1, first read
-L<perl5252delta>, which describes differences between 5.25.1 and 5.25.2.
-
-=head1 Core Enhancements
-
-=head2 Unicode 9.0 is now supported
-
-A list of changes is at L<http://www.unicode.org/versions/Unicode9.0.0/>.
-Modules that are shipped with core Perl but not maintained by p5p do not
-necessarily support Unicode 9.0. L<Unicode::Normalize> does work on 9.0.
-
-=head2 Use of C<\p{I<script>}> uses the improved Script_Extensions property
-
-Unicode 6.0 introduced an improved form of the Script (C<sc>) property, and
-called it Script_Extensions (C<scx>). As of now, Perl uses this improved
-version when a property is specified as just C<\p{I<script>}>. The meaning of
-compound forms, like C<\p{sc=I<script>}> are unchanged. This should make
-programs be more accurate when determining if a character is used in a given
-script, but there is a slight chance of breakage for programs that very
-specifically needed the old behavior. See L<perlunicode/Scripts>.
-
-=head2 Declaring a reference to a variable
-
-As an experimental feature, Perl now allows the referencing operator to come
-after L<C<my()>|perlfunc/my>, L<C<state()>|perlfunc/state>,
-L<C<our()>|perlfunc/our>, or L<C<local()>|perlfunc/local>. This syntax must
-be enabled with C<use feature 'declared_refs'>. It is experimental, and will
-warn by default unless C<no warnings 'experimental::refaliasing'> is in effect.
-It is intended mainly for use in assignments to references. For example:
-
- use experimental 'refaliasing', 'declared_refs';
- my \$a = \$b;
-
-See L<perlref/Assigning to References> for slightly more detail.
-
-=head1 Incompatible Changes
-
-=head2 C<${^ENCODING}> has been removed
-
-Consequently, the L<encoding> pragma's default mode is no longer supported. If
-you still need to write your source code in encodings other than UTF-8, use a
-source filter such as L<Filter::Encoding> on CPAN or L<encoding>'s C<Filter>
-option.
-
-=head2 C<scalar(%hash)> return signature changed
-
-The value returned for C<scalar(%hash)> will no longer show information about
-the buckets allocated in the hash. It will simply return the count of used
-keys. It is thus equivalent to C<0+keys(%hash)>.
-
-A form of backwards compatibility is provided via C<Hash::Util::bucket_ratio()>
-which provides the same behavior as C<scalar(%hash)> provided prior to Perl
-5.25.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<bignum> has been upgraded from version 0.42 to 0.43.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.160 to 2.161.
-
-=item *
-
-L<Devel::PPPort> has been upgraded from version 3.32 to 3.35.
-
-=item *
-
-L<Encode> has been upgraded from version 2.80 to 2.84.
-
-=item *
-
-L<encoding> has been upgraded from version 2.17 to 2.17_01.
-
-This module's default mode is no longer supported as of Perl 5.25.3. It now
-dies when imported, unless the C<Filter> option is being used.
-
-=item *
-
-L<encoding::warnings> has been upgraded from version 0.12 to 0.13.
-
-This module is no longer supported as of Perl 5.25.3. It emits a warning to
-that effect and then does nothing.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.32 to 3.33.
-
-=item *
-
-L<ExtUtils::Typemaps> has been upgraded from version 3.32 to 3.33.
-
-=item *
-
-L<feature> has been upgraded from version 1.44 to 1.45.
-
-=item *
-
-L<Hash::Util> has been upgraded from version 0.19 to 0.20.
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.999715 to 1.999726.
-
-=item *
-
-L<Math::BigInt::FastCalc> has been upgraded from version 0.40 to 0.42.
-
-=item *
-
-L<Math::BigRat> has been upgraded from version 0.260802 to 0.260804.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20160620 to 5.20160720.
-
-=item *
-
-L<Parse::CPAN::Meta> has been upgraded from version 1.4417 to 1.4422.
-
-=item *
-
-L<Perl::OSType> has been upgraded from version 1.009 to 1.010.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302026 to 1.302045.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9734 to 1.9739.
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.65 to 0.66.
-
-=item *
-
-L<version> has been upgraded from version 0.9916 to 0.9917.
-
-=item *
-
-L<warnings> has been upgraded from version 1.36 to 1.37.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.21 to 0.22, fixing a security hole
-in which binary files could be loaded from a path outside of
-L<C<@INC>|perlvar/@INC>.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perldata> and L<perltie>
-
-=over 4
-
-=item *
-
-Updated documentation of C<scalar(%hash)>. See L</scalar(%hash) return
-signature changed> above.
-
-=back
-
-=head3 L<perlexperiment> and L<perlref>
-
-=over 4
-
-=item *
-
-Documented new feature: See L</Declaring a reference to a variable> above.
-
-=back
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-Clarified documentation of L<C<seek()>|perlfunc/seek>,
-L<C<tell()>|perlfunc/tell> and L<C<sysseek()>|perlfunc/sysseek>.
-L<[perl #128607]|https://rt.perl.org/Public/Bug/Display.html?id=128607>
-
-=item *
-
-Removed obsolete documentation of L<C<study()>|perlfunc/study>.
-
-=back
-
-=head3 L<perlunicode>
-
-=over 4
-
-=item *
-
-Documented change to C<\p{I<script>}> to now use the improved Script_Extensions
-property. See L</Use of \p{script} uses the improved Script_Extensions
-property> above.
-
-=item *
-
-Updated the text to correspond with changes in Unicode UTS#18, concerning
-regular expressions, and Perl compatibility with what it says.
-
-=back
-
-=head3 L<perlvar>
-
-=over 4
-
-=item *
-
-Removed obsolete documentation of C<${^ENCODING}>. See L</${^ENCODING} has
-been removed> above.
-
-=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>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-L<The experimental declared_refs feature is not enabled|perldiag/"The experimental declared_refs feature is not enabled">
-
-(F) To declare references to variables, as in C<my \%x>, you must first enable
-the feature:
-
- no warnings "experimental::declared_refs";
- use feature "declared_refs";
-
-=back
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Declaring references is experimental|perldiag/"Declaring references is experimental">
-
-(S experimental::declared_refs) This warning is emitted if you use a reference
-constructor on the right-hand side of C<my()>, C<state()>, C<our()>, or
-C<local()>. Simply suppress the warning if you want to use the feature, but
-know that in doing so you are taking the risk of using an experimental feature
-which may change or be removed in a future Perl version:
-
- no warnings "experimental::declared_refs";
- use feature "declared_refs";
- $fooref = my \$foo;
-
-=item *
-
-L<C<${^ENCODING}> is no longer supported|perldiag/"${^ENCODING} is no longer supported">
-
-(D deprecated) The special variable C<${^ENCODING}>, formerly used to implement
-the C<encoding> pragma, is no longer supported as of Perl 5.26.0.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-F<Configure> now aborts if both "-Duselongdouble" and "-Dusequadmath" are
-requested.
-L<[perl #126203]|https://rt.perl.org/Public/Bug/Display.html?id=126203>
-
-=item *
-
-Fixed a bug in which F<Configure> could append "-quadmath" to the archname even
-if it was already present.
-L<[perl #128538]|https://rt.perl.org/Public/Bug/Display.html?id=128538>
-
-=item *
-
-Clang builds with "-DPERL_GLOBAL_STRUCT" or "-DPERL_GLOBAL_STRUCT_PRIVATE" have
-been fixed (by disabling Thread Safety Analysis for these configurations).
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-A new test script, F<t/op/decl-refs.t>, has been added to test the new feature,
-"Declaring a reference to a variable".
-
-=item *
-
-A new test script, F<t/re/anyof.t>, has been added to test that the ANYOF nodes
-generated by bracketed character classes are as expected.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item VAX
-
-VAX floating point formats are now supported.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-An assertion failure with C<%: = 0> has been fixed.
-L<[perl #128238]|https://rt.perl.org/Public/Bug/Display.html?id=128238>
-
-=item *
-
-In Perl 5.18, the parsing of C<"$foo::$bar"> was accidentally changed, such
-that it would be treated as C<$foo."::".$bar>. The previous behavior, which
-was to parse it as C<$foo:: . $bar>, has been restored.
-L<[perl #128478]|https://rt.perl.org/Public/Bug/Display.html?id=128478>
-
-=item *
-
-Since Perl 5.20, line numbers have been off by one when perl is invoked with
-the B<-x> switch. This has been fixed.
-L<[perl #128508]|https://rt.perl.org/Public/Bug/Display.html?id=128508>
-
-=item *
-
-Vivifying a subroutine stub in a deleted stash (e.g., C<delete $My::{"Foo::"};
-\&My::Foo::foo>) no longer crashes. It had begun crashing in Perl 5.18.
-L<[perl #128532]|https://rt.perl.org/Public/Bug/Display.html?id=128532>
-
-=item *
-
-Some obscure cases of subroutines and file handles being freed at the same time
-could result in crashes, but have been fixed. The crash was introduced in Perl
-5.22.
-L<[perl #128597]|https://rt.perl.org/Public/Bug/Display.html?id=128597>
-
-=item *
-
-Code that looks for a variable name associated with an uninitialized value
-could cause an assertion in cases where magic is involved, such as
-C<$ISA[0][0]>. This has now been fixed.
-L<[perl #128253]|https://rt.perl.org/Public/Bug/Display.html?id=128253>
-
-=item *
-
-A crash caused by code generating the warning "Subroutine STASH::NAME
-redefined" in cases such as C<sub P::f{} undef *P::; *P::f =sub{};> has been
-fixed. In these cases, where the STASH is missing, the warning will now appear
-as "Subroutine NAME redefined".
-L<[perl #128257]|https://rt.perl.org/Public/Bug/Display.html?id=128257>
-
-=item *
-
-Fixed an assertion triggered by some code that handles deprecated behavior in
-formats, e.g. in cases like this:
-
- format STDOUT =
- @
- 0"$x"
-
-L<[perl #128255]|https://rt.perl.org/Public/Bug/Display.html?id=128255>
-
-=item *
-
-A possible divide by zero in string transformation code on Windows has been
-avoided, fixing a crash when collating an empty string.
-L<[perl #128618]|https://rt.perl.org/Public/Bug/Display.html?id=128618>
-
-=item *
-
-Some regular expression parsing glitches could lead to assertion failures with
-regular expressions such as C</(?<=/> and C</(?<!/>. This has now been fixed.
-L<[perl #128170]|https://rt.perl.org/Public/Bug/Display.html?id=128170>
-
-=back
-
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
-
-Parsing bad POSIX charclasses no longer leaks memory. This was fixed in Perl
-5.25.2
-L<[perl #128313]|https://rt.perl.org/Public/Bug/Display.html?id=128313>
-
-=item *
-
-Fixed issues with recursive regexes. The behavior was fixed in Perl 5.24.0.
-L<[perl #126182]|https://rt.perl.org/Public/Bug/Display.html?id=126182>
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.3 represents approximately 4 weeks of development since Perl 5.25.2
-and contains approximately 67,000 lines of changes across 510 files from 25
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 40,000 lines of changes to 290 .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 5.25.3:
-
-Aaron Crane, Ævar Arnfjörð Bjarmason, Alex Vandiver, Aristotle Pagaltzis,
-Chad Granum, Chris 'BinGOs' Williams, Chris Lamb, Craig A. Berry, Dan Collins,
-David Mitchell, Father Chrysostomos, H.Merijn Brand, Jarkko Hietaniemi, Karl
-Williamson, Lukas Mai, Matthew Horsfall, Salvador Fandiño, Sawyer X,
-Sébastien Aperghis-Tramoni, Steffen Müller, Steve Hay, Todd Rinaldo, Tony
-Cook, Unicode Consortium, Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database at
-L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION> for details of how to
-report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5254delta - what is new for perl v5.25.4
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.3 release and the 5.25.4
-release.
-
-If you are upgrading from an earlier release such as 5.25.2, first read
-L<perl5253delta>, which describes differences between 5.25.2 and 5.25.3.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-The rather slow implementation for the experimental subroutine signatures
-feature has been made much faster; it is now comparable in speed with the
-old-style C<my ($a, $b, @c) = @_>.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlcall>
-
-=over 4
-
-=item *
-
-Removed redundant C<dSP> from an example.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.08 to 2.10.
-
-=item *
-
-L<arybase> has been upgraded from version 0.11 to 0.12.
-
-=item *
-
-L<B> has been upgraded from version 1.62 to 1.63.
-
-=item *
-
-L<B::Concise> has been upgraded from version 0.996 to 0.998.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.37 to 1.38.
-
-=item *
-
-L<base> has been upgraded from version 2.23 to 2.24.
-
-=item *
-
-L<bignum> has been upgraded from version 0.43 to 0.43_01.
-
-=item *
-
-L<Carp> has been upgraded from version 1.41 to 1.42.
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.26 to 0.27.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.14 to 2.14_01.
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.150005 to 2.150010.
-
-=item *
-
-L<Digest> has been upgraded from version 1.17 to 1.17_01.
-
-=item *
-
-L<Digest::SHA> has been upgraded from version 5.95 to 5.96.
-
-=item *
-
-L<Encode> has been upgraded from version 2.84 to 2.86.
-
-=item *
-
-L<encoding> has been upgraded from version 2.17_01 to 2.18.
-
-=item *
-
-L<Errno> has been upgraded from version 1.25 to 1.26.
-
-=item *
-
-L<ExtUtils::MakeMaker> has been upgraded from version 7.18 to 7.24.
-
-=item *
-
-L<File::Fetch> has been upgraded from version 0.48 to 0.52.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.64 to 3.65.
-
-=item *
-
-L<Hash::Util> has been upgraded from version 0.20 to 0.21.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.058 to 0.064.
-
-=item *
-
-L<I18N::LangTags> has been upgraded from version 0.40 to 0.41.
-
-=item *
-
-L<IO> has been upgraded from version 1.36 to 1.37.
-
-=item *
-
-L<IO-Compress> has been upgraded from version 2.069 to 2.069_01.
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.37 to 0.38.
-
-=item *
-
-L<IPC::Cmd> has been upgraded from version 0.94 to 0.96.
-
-=item *
-
-L<JSON::PP> has been upgraded from version 2.27400 to 2.27400_01.
-
-=item *
-
-L<Locale::Maketext> has been upgraded from version 1.27 to 1.28.
-
-=item *
-
-L<Locale::Maketext::Simple> has been upgraded from version 0.21 to 0.21_01.
-
-=item *
-
-L<Memoize> has been upgraded from version 1.03 to 1.03_01.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20160720 to 5.20160820.
-
-=item *
-
-L<Module::Load::Conditional> has been upgraded from version 0.64 to 0.68.
-
-=item *
-
-L<Module::Metadata> has been upgraded from version 1.000032 to 1.000033.
-
-=item *
-
-L<Net::Ping> has been upgraded from version 2.43 to 2.44.
-
-=item *
-
-L<NEXT> has been upgraded from version 0.65 to 0.67.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.35 to 1.37.
-
-=item *
-
-L<Pod::Html> has been upgraded from version 1.22 to 1.2201.
-
-=item *
-
-L<Pod::Perldoc> has been upgraded from version 3.25_02 to 3.27.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.70 to 1.71.
-
-=item *
-
-L<Storable> has been upgraded from version 2.56 to 2.57.
-
-=item *
-
-L<Sys::Syslog> has been upgraded from version 0.34 to 0.34_01.
-
-=item *
-
-L<Test> has been upgraded from version 1.28 to 1.29.
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.36 to 3.36_01.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302045 to 1.302052.
-
-=item *
-
-L<Tie::Hash::NamedCapture> has been upgraded from version 0.09 to 0.10.
-
-=item *
-
-L<Time::Local> has been upgraded from version 1.2300 to 1.24.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-A probe for C<gai_strerror> was added to F<Configure> that checks if the
-the gai_strerror() routine is available and can be used to
-translate error codes returned by getaddrinfo() into human
-readable strings.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Hurd
-
-The hints for Hurd have been improved enabling malloc wrap and reporting the
-GNU libc used (previously it was an empty string when reported).
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Three new ops, C<OP_ARGELEM>, C<OP_ARGDEFELEM> and C<OP_ARGCHECK> have
-been added. These are intended principally to implement the individual
-elements of a subroutine signature, plus any overall checking required.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Problems with in-place array sorts: code like C<@a = sort { ... } @a>,
-where the source and destination of the sort are the same plain array, are
-optimised to do less copying around. Two side-effects of this optimisation
-were that the contents of C<@a> as visible to to sort routine were
-partially sorted, and under some circumstances accessing C<@a> during the
-sort could crash the interpreter. Both these issues have been fixed, and
-Sort functions see the original value of C<@a>.
-
-=item *
-
-Non-ASCII string delimiters are now reported correctly in error messages
-for unterminated strings. [perl #128701]
-
-=item *
-
-C<pack("p", ...)> used to emit its warning ("Attempt to pack pointer to
-temporary value") erroneously in some cases, but has been fixed.
-
-=item *
-
-C<@DB::args> is now exempt from "used once" warnings. The warnings only
-occurred under B<-w>, because F<warnings.pm> itself uses C<@DB::args>
-multiple times.
-
-=item *
-
-The use of built-in arrays or hash slices in a double-quoted string no
-longer issues a warning ("Possible unintended interpolation...") if the
-variable has not been mentioned before. This affected code like
-C<qq|@DB::args|> and C<qq|@SIG{'CHLD', 'HUP'}|>. (The special variables
-C<@-> and C<@+> were already exempt from the warning.)
-
-=item *
-
-C<gethostent> and similar functions now perform a null check internally, to
-avoid crashing with torsocks. This was a regression from 5.22. [perl
-#128740]
-
-=item *
-
-C<defined *{'!'}>, C<defined *{'['}>, and C<defined *{'-'}> no longer leak
-memory if the typeglob in question has never been accessed before.
-
-=item *
-
-In 5.25.4 fchown() was changed not to accept negative one as an argument
-because in some platforms that is an error. However, in some other platforms
-that is an acceptable argument. This change has been reverted [perl #128967].
-
-=item *
-
-Mentioning the same constant twice in a row (which is a syntax error) no
-longer fails an assertion under debugging builds. This was a regression
-from 5.20. [perl #126482]
-
-=item *
-
-Many issues relating to C<printf "%a"> of hexadecimal floating point
-were fixed. In addition, the "subnormals" (formerly known as "denormals")
-floating point anumbers are now supported both with the plain IEEE 754
-floating point numbers (64-bit or 128-bit) and the x86 80-bit
-"extended precision". Note that subnormal hexadecimal floating
-point literals will give a warning about "exponent underflow".
-[perl #128843, #128889, #128890, #128893, #128909, #128919]
-
-=item *
-
-A regression in 5.24 with C<tr/\N{U+...}/foo/> when the code point was between
-128 and 255 has been fixed. [perl #128734].
-
-=item *
-
-A regression from the previous development release, 5.23.3, where
-compiling a regular expression could crash the interpreter has been
-fixed. [perl #128686].
-
-=item *
-
-Use of a string delimiter whose code point is above 2**31 now works
-correctly on platforms that allow this. Previously, certain characters,
-due to truncation, would be confused with other delimiter characters
-with special meaning (such as C<?> in C<m?...?>), resulting
-in inconsistent behaviour. Note that this is non-portable,
-and is based on Perl's extension to UTF-8, and is probably not
-displayable nor enterable by any editor. [perl #128738]
-
-=item *
-
-C<@{x> followed by a newline where C<x> represents a control or non-ASCII
-character no longer produces a garbled syntax error message or a crash.
-[perl #128951]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.4 represents approximately 4 weeks of development since Perl 5.25.3
-and contains approximately 18,000 lines of changes across 820 files from 23
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 9,200 lines of changes to 660 .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 5.25.4:
-
-Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan
-Collins, Daniel Dragan, David Mitchell, Father Chrysostomos, H.Merijn Brand,
-James E Keenan, Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Lukas Mai,
-Neil Bowers, Nicolas R., Pino Toscano, Rafael Garcia-Suarez, Richard Levitte,
-Shlomi Fish, Smylers, Steve Hay, Tony Cook, Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5255delta - what is new for perl v5.25.5
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.4 release and the 5.25.5
-release.
-
-If you are upgrading from an earlier release such as 5.25.3, first read
-L<perl5254delta>, which describes differences between 5.25.3 and 5.25.4.
-
-=head1 Security
-
-=head2 "Escaped" colons and relative paths in PATH
-
-On Unix systems, Perl treats any relative paths in the PATH environment
-variable as tainted when starting a new process. Previously, it was
-allowing a backslash to escape a colon (unlike the OS), consequently
-allowing relative paths to be considered safe if the PATH was set to
-something like C</\:.>. The check has been fixed to treat C<.> as tainted
-in that example.
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Filter::Simple> has been upgraded from version 0.92 to 0.93.
-
-It no longer treats C<no MyFilter> immediately following C<use MyFilter> as
-end-of-file. [perl #107726]
-
-=item *
-
-L<Locale::Codes> has been upgraded from 3.39 to 3.40.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20160820 to 5.20160920.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.71 to 1.72.
-
-=item *
-
-L<Sys::Syslog> has been upgraded from version 0.34_01 to 0.35.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302052 to 1.302056.
-
-=item *
-
-L<Thread::Semaphore> has been upgraded from 2.12 to 2.13.
-
-Added the C<down_timed> method.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.22 to 0.24.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlinterp>
-
-=over 4
-
-=item *
-
-L<perlinterp> has been expanded to give a more detailed example of how to
-hunt around in the parser for how a given operator is handled.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-F<t/re/regexp_nonull.t> has been added to test that the regular expression
-engine can handle scalars that do not have a null byte just past the end of
-the string.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item VMS
-
-=over 4
-
-=item *
-
-The path separator for the C<PERL5LIB> and C<PERLLIB> environment entries is
-now a colon (C<:>) when running under a Unix shell. There is no change when
-running under DCL (it's still C<|>).
-
-=item *
-
-Remove some VMS-specific hacks from C<showlex.t>. These were added 15 years
-ago, and are no longer necessary for any VMS version now supported.
-
-=back
-
-=back
-
-=over 4
-
-=item Win32
-
-=over 4
-
-=item *
-
-Tweaks for Win32 VC vs GCC detection makefile code. This fixes issue that CCHOME
-depends on CCTYPE, which in auto detect mode is set after CCHOME, so CCHOME uses
-the uninit CCTYPE var. Also fix else vs .ELSE in makefile.mk
-
-=back
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-Several macros and functions have been added to the public API for
-dealing with Unicode and UTF-8-encoded strings. See
-L<perlapi/Unicode Support>.
-
-=item *
-
-Use C<my_strlcat()> in C<locale.c>. While C<strcat()> is safe in this context,
-some compilers were optimizing this to C<strcpy()> causing a porting test to
-fail that looks for unsafe code. Rather than fighting this, we just use
-C<my_strlcat()> instead.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Invalid assignments to a reference constructor (e.g., C<\eval=time>) could
-sometimes crash in addition to giving a syntax error. [perl #125679]
-
-=item *
-
-The parser could sometimes crash if a bareword came after C<evalbytes>.
-[perl #129196]
-
-=item *
-
-Autoloading via a method call would warn erroneously ("Use of inherited
-AUTOLOAD for non-method") if there was a stub present in the package into
-which the invocant had been blessed. The warning is no longer emitted in
-such circumstances. [perl #47047]
-
-=item *
-
-A sub containing with a "forward" declaration with the same name (e.g.,
-C<sub c { sub c; }>) could sometimes crash or loop infinitely. [perl
-#129090]
-
-=item *
-
-The use of C<splice> on arrays with nonexistent elements could cause other
-operators to crash. [perl #129164]
-
-=item *
-
-Fixed case where C<re_untuit_start> will overshoot the length of a utf8
-string. [perl #129012]
-
-=item *
-
-Handle C<CXt_SUBST> better in C<Perl_deb_stack_all>, previously it wasn't
-checking that the I<current> C<cx> is the right type, and instead was always
-checking the base C<cx> (effectively a noop). [perl #129029]
-
-=item *
-
-Fixed two possible use-after-free bugs in C<Perl_yylex>. C<Perl_yylex>
-maintains up to two pointers into the parser buffer, one of which can
-become stale under the right conditions. [perl #129069]
-
-=item *
-
-Fixed a crash with C<s///l> where it thought it was dealing with UTF-8
-when it wasn't. [perl #129038]
-
-=item *
-
-Fixed place where regex was not setting the syntax error correctly.
-[perl #129122]
-
-=item *
-
-The C<&.> operator (and the C<&> operator, when it treats its arguments as
-strings) were failing to append a trailing null byte if at least one string
-was marked as utf8 internally. Many code paths (system calls, regexp
-compilation) still expect there to be a null byte in the string buffer
-just past the end of the logical string. An assertion failure was the
-result. [perl #129287]
-
-=item *
-
-Check C<pack_sockaddr_un()>'s return value because C<pack_sockaddr_un()>
-silently truncates the supplied path if it won't fit into the C<sun_path>
-member of C<sockaddr_un>. This may change in the future, but for now
-check the path in theC<sockaddr> matches the desired path, and skip if
-it doesn't. [perl #128095]
-
-=item *
-
-Make sure C<PL_oldoldbufptr> is preserved in C<scan_heredoc()>. In some
-cases this is used in building error messages. [perl #128988]
-
-=item *
-
-Check for null PL_curcop in IN_LC() [perl #129106]
-
-=item *
-
-Fixed the parser error handling for an 'C<:attr(foo>' that does not have
-an ending 'C<)>'.
-
-=item *
-
-Fix C<Perl_delimcpy()> to handle a backslash as last char, this
-actually fixed two bugs, [perl #129064] and [perl #129176].
-
-=item *
-
-[perl #129267] rework gv_fetchmethod_pvn_flags separator parsing to
-prevent possible string overrun with invalid len in gv.c
-
-=back
-
-=head1 Obituary
-
-Jon Portnoy (AVENJ), a prolific Perl author and admired Gentoo community
-member, has passed away on August 10, 2016. He will be remembered and
-missed by all those with which he came in contact and enriched with his
-intellect, wit, and spirit.
-
-=head1 Acknowledgements
-
-Perl 5.25.5 represents approximately 4 weeks of development since Perl 5.25.4
-and contains approximately 67,000 lines of changes across 230 files from 25
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 62,000 lines of changes to 160 .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 5.25.5:
-
-Aaron Crane, Aristotle Pagaltzis, Chris 'BinGOs' Williams, Craig A. Berry,
-Dagfinn Ilmari Mannsåker, Dan Collins, Daniel Dragan, Dave Cross, David
-Mitchell, E. Choroba, Father Chrysostomos, James E Keenan, Jerry D. Hedden,
-Karl Williamson, Lukas Mai, Ricardo Signes, Rick Delaney, Sawyer X, Stevan
-Little, Steve Hay, Sullivan Beck, Theo Buehler, Tony Cook, Yaroslav Kuzmin,
-Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5256delta - what is new for perl v5.25.6
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.5 release and the 5.25.6
-release.
-
-If you are upgrading from an earlier release such as 5.25.4, first read
-L<perl5255delta>, which describes differences between 5.25.4 and 5.25.5.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Converting a single-digit string to a number is now substantially faster.
-
-=item *
-
-The internal op implementing the C<split> builtin has been simplified and
-sped up. Firstly, it no longer requires a subsidiary internal C<pushre> op
-to do its work. Secondly, code of the form C<my @x = split(...)> is now
-optimised in the same way as C<@x = split(...)>, and is therefore a few
-percent faster.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.10 to 2.14.
-
-=item *
-
-L<attributes> has been upgraded from version 0.27 to 0.28.
-
-=item *
-
-L<B> has been upgraded from version 1.63 to 1.64.
-
-=item *
-
-L<B::Concise> has been upgraded from version 0.998 to 0.999.
-
-Its output is now more descriptive for C<op_private> flags.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.38 to 1.39.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.161 to 2.162.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.24 to 1.25.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.064 to 0.070.
-
-Internal 599-series errors now include the redirect history.
-
-=item *
-
-L<List::Util> has been upgraded from version 1.45_01 to 1.46.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20160920 to 5.20161020.
-
-=item *
-
-L<mro> has been upgraded from version 1.18 to 1.19.
-
-=item *
-
-L<Net::Ping> has been upgraded from version 2.44 to 2.51.
-
-IPv6 addresses and C<AF_INET6> sockets are now supported, along with several
-other enhancements.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.37 to 1.38.
-
-=item *
-
-L<overload> has been upgraded from version 1.26 to 1.27.
-
-Its compilation speed has been improved slightly.
-
-=item *
-
-L<parent> has been upgraded from version 0.234 to 0.236.
-
-=item *
-
-L<PerlIO::encoding> has been upgraded from version 0.24 to 0.25.
-
-=item *
-
-podlators has been upgraded from version 4.07 to 4.08.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.72 to 1.73.
-
-=item *
-
-L<Scalar::Util> has been upgraded from version 1.45_01 to 1.46.
-
-=item *
-
-L<Storable> has been upgraded from version 2.57 to 2.58.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302056 to 1.302059.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9739 to 1.9740_01.
-
-It now builds on systems with C++11 compilers (such as G++ 6 and Clang++
-3.9).
-
-=item *
-
-L<VMS::Stdio> has been upgraded from version 2.41 to 2.42.
-
-=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>.
-
-=head2 New Diagnostics
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-Using the empty pattern (which re-executes the last successfully-matched
-pattern) inside a code block in another regex, as in C</(?{ s!!new! })/>, has
-always previously yielded a segfault. It now produces an error: L<Use of the
-empty pattern inside of a regex code block is forbidden|perldiag/"Use of the
-empty pattern inside of a regex code block is forbidden">.
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-Details as to the exact problem have been added to the diagnostics that
-occur when malformed UTF-8 is encountered when trying to convert to a
-code point.
-
-=item *
-
-Executing C<undef $x> where C<$x> is tied or magical no longer incorrectly
-blames the variable for an uninitialized-value warning encountered by the
-tied/magical code.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-Builds using C<USE_PAD_RESET> now work again; this configuration had
-bit-rotted.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-Some parts of the test suite that try to exhaustively test edge cases in the
-regex implementation have been restricted to running for a maximum of five
-minutes. On slow systems they could otherwise take several hours, without
-significantly improving our understanding of the correctness of the code
-under test.
-
-In addition, some of those test cases have been split into more files, to
-allow them to be run in parallel on suitable systems.
-
-=item *
-
-A new internal facility allows analysing the time taken by the individual
-tests in Perl's own test suite; see F<Porting/harness-timer-report.pl>.
-
-=back
-
-=head1 Platform Support
-
-=head2 New Platforms
-
-=over 4
-
-=item NetBSD/VAX
-
-Perl now compiles under NetBSD on VAX machines. However, it's not
-possible for that platform to implement floating-point infinities and
-NaNs compatibly with most modern systems, which implement the IEEE-754
-floating point standard. The hexadecimal floating point (C<0x...p[+-]n>
-literals, C<printf %a>) is not implemented, either.
-The C<make test> passes 98% of tests.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-The C<PADOFFSET> type has changed from being unsigned to signed, and
-several pad-related variables such as C<PL_padix> have changed from being
-of type C<I32> to type C<PADOFFSET>.
-
-=item *
-
-The function C<L<perlapi/utf8n_to_uvchr>> has been changed to not
-abandon searching for other malformations when the first one is
-encountered. A call to it thus can generate multiple diagnostics,
-instead of just one.
-
-=item *
-
-A new function, C<L<perlapi/utf8n_to_uvchr_error>>, has been added for
-use by modules that need to know the details of UTF-8 malformations
-beyond pass/fail. Previously, the only ways to know why a sequence was
-ill-formed was to capture and parse the generated diagnostics, or to do
-your own analysis.
-
-=item *
-
-Several new functions for handling Unicode have been added to the API:
-C<L<perlapi/is_strict_utf8_string>>,
-C<L<perlapi/is_c9strict_utf8_string>>,
-C<L<perlapi/is_utf8_string_flags>>,
-C<L<perlapi/is_strict_utf8_string_loc>>,
-C<L<perlapi/is_strict_utf8_string_loclen>>,
-C<L<perlapi/is_c9strict_utf8_string_loc>>,
-C<L<perlapi/is_c9strict_utf8_string_loclen>>,
-C<L<perlapi/is_utf8_string_loc_flags>>,
-C<L<perlapi/is_utf8_string_loclen_flags>>,
-C<L<perlapi/is_utf8_fixed_width_buf_flags>>,
-C<L<perlapi/is_utf8_fixed_width_buf_loc_flags>>,
-C<L<perlapi/is_utf8_fixed_width_buf_loclen_flags>>.
-
-These functions are all extensions of the C<is_utf8_string_*()> functions,
-that apply various restrictions to the UTF-8 recognized as valid.
-
-=item *
-
-A new API function C<sv_setvpv_bufsize()> allows simultaneously setting the
-length and allocated size of the buffer in an C<SV>, growing the buffer if
-necessary.
-
-=item *
-
-A new API macro C<SvPVCLEAR()> sets its C<SV> argument to an empty string,
-like Perl-space C<$x = ''>, but with several optimisations.
-
-=item *
-
-All parts of the internals now agree that the C<sassign> op is a C<BINOP>;
-previously it was listed as a C<BASEOP> in F<regen/opcodes>, which meant
-that several parts of the internals had to be special-cased to accommodate
-it. This oddity's original motivation was to handle code like C<$x ||= 1>;
-that is now handled in a simpler way.
-
-=item *
-
-Several new internal C macros have been added that take a string literal as
-arguments, alongside existing routines that take the equivalent value as two
-arguments, a character pointer and a length. The advantage of this is that
-the length of the string is calculated automatically, rather than having to
-be done manually. These routines are now used where appropriate across the
-entire codebase.
-
-=item *
-
-The code in F<gv.c> that determines whether a variable has a special meaning
-to Perl has been simplified.
-
-=item *
-
-The C<DEBUGGING>-mode output for regex compilation and execution has been
-enhanced.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-A sub containing a "forward" declaration with the same name (e.g.,
-C<sub c { sub c; }>) could sometimes crash or loop infinitely. [perl
-#129090]
-
-=item *
-
-A crash in executing a regex with a floating UTF-8 substring against a
-target string that also used UTF-8 has been fixed. [perl #129350]
-
-=item *
-
-Previously, a shebang line like C<#!perl -i u> could be erroneously
-interpreted as requesting the C<-u> option. This has been fixed. [perl
-#129336]
-
-=item *
-
-The regex engine was previously producing incorrect results in some rare
-situations when backtracking past a trie that matches only one thing; this
-showed up as capture buffers (C<$1>, C<$2>, etc) erroneously containing data
-from regex execution paths that weren't actually executed for the final
-match. [perl #129897]
-
-=item *
-
-Certain regexes making use of the experimental C<regex_sets> feature could
-trigger an assertion failure. This has been fixed. [perl #129322]
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.6 represents approximately 4 weeks of development since Perl 5.25.5
-and contains approximately 16,000 lines of changes across 300 files from 23
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 10,000 lines of changes to 190 .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 5.25.6:
-
-Aaron Crane, Andy Lester, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker,
-Dan Collins, David Mitchell, François Perrad, Hugo van der Sanden, James E
-Keenan, James Raspass, Jarkko Hietaniemi, Karl Williamson, Lukas Mai, Nicolas
-R., Reini Urban, Sawyer X, Sergey Aleynikov, Stevan Little, Steve Hay, Steven
-Humphrey, Thomas Sibley, Tony Cook, Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5257delta - what is new for perl v5.25.7
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.6 release and the 5.25.7
-release.
-
-If you are upgrading from an earlier release such as 5.25.5, first read
-L<perl5256delta>, which describes differences between 5.25.5 and 5.25.6.
-
-=head1 Core Enhancements
-
-=head2 Indented Here-documents
-
-This adds a new modifier '~' to here-docs that tells the parser
-that it should look for /^\s*$DELIM\n/ as the closing delimiter.
-
-These syntaxes are all supported:
-
- <<~EOF;
- <<~\EOF;
- <<~'EOF';
- <<~"EOF";
- <<~`EOF`;
- <<~ 'EOF';
- <<~ "EOF";
- <<~ `EOF`;
-
-The '~' modifier will strip, from each line in the here-doc, the
-same whitespace that appears before the delimiter.
-
-Newlines will be copied as is, and lines that don't include the
-proper beginning whitespace will cause perl to croak.
-
-For example:
-
- if (1) {
- print <<~EOF;
- Hello there
- EOF
- }
-
-prints "Hello there\n" with no leading whitespace.
-
-=head2 '.' and @INC
-
-Perl now provides a way to build perl without C<.> in @INC by default. If you
-want this feature, you can build with -Ddefault_inc_excludes_dot
-
-Because the testing / make process for perl modules do not function well with
-C<.> missing from @INC, Perl now supports the environment variable
-PERL_USE_UNSAFE_INC=1 which makes Perl behave as it previously did, returning
-C<.> to @INC in all child processes.
-
-WARNING: PERL_USE_UNSAFE_INC has been provided during the perl 5.25 development
-cycle and is not guaranteed to function in perl 5.26.
-
-=head2 create a safer utf8_hop() called utf8_hop_safe()
-
-Unlike utf8_hop(), utf8_hop_safe() won't navigate before the beginning or after
-the end of the supplied buffer.
-
-=head2 Fix taint handling in list assignment
-
-commit v5.25.6-79-gb09ed99 reworked list assignment, and
-accidentally broke taint handling at the same time.
-
-=head2 @{^CAPTURE}, %{^CAPTURE}, and %{^CAPTURE_ALL}
-
-@{^CAPTURE} exposes the capture buffers of the last match as an array. So $1 is
-${^CAPTURE}[0].
-
-%{^CAPTURE} is the equivalent to %+ (ie named captures)
-
-%{^CAPTURE_ALL} is the equivalent to %- (ie all named captures).
-
-=head2 op.c: silence compiler warning in fold_constants()
-
- op.c: In function ‘S_fold_constants’:
- op.c:4374:28: warning: argument ‘o’ might be clobbered by ‘longjmp’ or ‘vfork’ [-Wclobbered]
- S_fold_constants(pTHX_ OP *o)
- ^
-
-This warning has been silenced.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Reduce cost of SvVALID().
-
-=item *
-
-C<$ref1 = $ref2> has been optimized.
-
-=item *
-
-Array and hash assignment are now faster, e.g.
-
- (..., @a) = (...);
- (..., %h) = (...);
-
-especially when the RHS is empty.
-
-=item *
-
-Reduce the number of odd special cases for the SvSCREAM flag.
-
-=item *
-
-Avoid sv_catpvn() in do_vop() when unneeded.
-
-=item *
-
-Enhancements in Regex concat COW implementation.
-
-=item *
-
-Speed up AV and HV clearing/undeffing.
-
-=item *
-
-Better optimise array and hash assignment
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<podlators> has been upgraded from version 4.08 to 4.09.
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.14 to 2.18.
-
-=item *
-
-L<B> has been upgraded from version 1.64 to 1.65.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.162 to 2.165.
-
-The XS implementation now supports Deparse.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.25 to 1.26.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.39 to 1.40.
-
-=item *
-
-L<Errno> has been upgraded from version 1.26 to 1.27.
-
-Document that using C<%!> loads Errno for you.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.65 to 3.66.
-
-=item *
-
-L<Hash::Util> has been upgraded from version 0.21 to 0.22.
-
-=item *
-
-L<JSON::PP> has been upgraded from version 2.27400_01 to 2.27400_02.
-
-=item *
-
-L<List::Util> has been upgraded from version 1.46 to 1.46_02.
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.999726(_01) to 1.999727.
-
-There have also been some core customizations.
-
-=item *
-
-L<Math::Complex> has been upgraded from version 1.59 to 1.5901.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20161020 to 5.20161120.
-
-=item *
-
-L<mro> has been upgraded from version 1.19 to 1.20.
-
-=item *
-
-L<Net::Ping> has been upgraded from version 2.51 to 2.55.
-
-Remove sudo from 500_ping_icmp.t.
-
-Avoid stderr noise in tests
-
-Check for echo in new Net::Ping tests.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.38 to 1.39.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.73 to 1.75.
-
-=item *
-
-L<Scalar::Util> has been upgraded from version 1.46 to 1.46_02.
-
-=item *
-
-L<Storable> has been upgraded from version 2.58 to 2.59.
-
-=item *
-
-L<Term::ANSIColor> has been upgraded from version 4.05 to 4.06.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302059 to 1.302062.
-
-=item *
-
-L<threads> has been upgraded from version 2.09 to 2.10.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9740_01 to 1.9740_03.
-
-Now uses clockid_t.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.14 to 1.18.
-
-=item *
-
-L<Unicode::Normalize> is now maintained by p5p and has been moved to dist/
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.66 to 0.67.
-
-=item *
-
-L<XS::Typemap> has been upgraded from version 0.14 to 0.15.
-
-=back
-
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-Defined on aggregates is no longer allowed. Perlfunc was still reporting it as
-deprecated, and that it will be deleted in the future.
-
-=back
-
-=head3 L<perldata>
-
-=over 4
-
-=item *
-
-Use of single character variables, with the variable name a non printable
-character in the range \x80-\xFF is no longer allowed. Update the docs to
-reflect this.
-
-=back
-
-=head3 L<perlobj>
-
-=over 4
-
-=item *
-
-Added a section on calling methods using their fully qualified names.
-
-=item *
-
-Do not discourage manual @ISA.
-
-=back
-
-=head3 L<perlop>
-
-=over 4
-
-=item *
-
-Clarify behavior single quote regexps.
-
-=back
-
-=head3 L<perllocale>
-
-=over 4
-
-=item *
-
-Some locales aren't compatible with Perl. Note the potential bad
-consequences of using them.
-
-=back
-
-=head3 L<perldiag>
-
-=over 4
-
-=item *
-
-Deprecations are to be marked with a D.
-C<"%s() is deprecated on :utf8 handles"> use a deprecation message, and as
-such, such be marked C<"(D deprecated)"> and not C<"(W deprecated)">.
-
-=back
-
-=head3 L<perlguts>
-
-=over 4
-
-=item *
-
-add pTHX_ to magic method examples.
-
-=back
-
-=head3 L<perlvar>
-
-=over 4
-
-=item *
-
-Document @ISA. Was documented other places, not not in perlvar.
-
-=back
-
-=head3 L<perlootut>
-
-=over 4
-
-=item *
-
-Tidy the document.
-
-=item *
-
-Mention Moo more.
-
-=back
-
-=head3 L<perlhack>
-
-=over 4
-
-=item *
-
-Document Tab VS Space.
-
-=back
-
-=head3 L<perlre>
-
-=over 4
-
-=item *
-
-Several minor enhancements to the documentation.
-
-=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>.
-
-=head2 Changes to Existing Diagnostics
-
-=over 4
-
-=item *
-
-Improve error for missing tie() package/method. This brings the error messages
-in line with the ones used for normal method calls, despite not using
-call_method().
-
-=item *
-
-Make the sysread()/syswrite/() etc :utf8 handle warnings default. These
-warnings were under 'deprecated' previously.
-
-=item *
-
-'do' errors now refer to 'do' (not 'require').
-
-=back
-
-=head1 Utility Changes
-
-=over 4
-
-=item *
-
-Porting/pod_lib.pl
-
-Removed spurious executable bit.
-
-Account for possibility of DOS file endings.
-
-=item *
-
-perf/benchmarks
-
-Tidy file, rename some symbols.
-
-=item *
-
-Porting/checkAUTHORS.pl
-
-Replace obscure character range with \w.
-
-=item *
-
-t/porting/regen.t
-
-try to be more helpful when tests fail.
-
-=item *
-
-utils/h2xs.PL
-
-Avoid infinite loop for enums.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-Remove "Warning: perl appears in your path"
-
-This install warning is more or less obsolete, since most platforms already
-*will* have a /usr/bin/perl or similar provided by the OS.
-
-=item *
-
-Reduce verbosity of "make install.man"
-
-Previously, two progress messages were emitted for each manpage: one by
-installman itself, and one by the function in install_lib.pl that it calls to
-actually install the file. Disabling the second of those in each case saves
-over 750 lines of unhelpful output.
-
-=item *
-
-Cleanup for clang -Weverything support. [perl 129961]
-
-=item *
-
-Configure: signbit scan was assuming too much, stop assuming negative 0.
-
-=item *
-
-Various compiler warnings have been silenced.
-
-=item *
-
-Several smaller changes have been made to remove impediments to compiling under
-C++11.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-XS-APItest/t/utf8.t: Several small fixes and enhancements.
-
-=item *
-
-Tests for locales were erroneously using locales incompatible with Perl.
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Darwin
-
-don't treat -Dprefix=/usr as special, instead require an extra option
--Ddarwin_distribution to produce the same results.
-
-=item POSIX
-
-Finish removing POSIX deprecated functions.
-
-=item OS X
-
-OS X El Capitan doesn't implement the clock_gettime() or clock_getres() APIs,
-emulate them as necessary.
-
-=item macOS
-
-Deprecated syscall(2) on macOS 10.12.
-
-=item EBCDIC
-
-Several tests have been updated to work (or be skipped) on EBCDIC platforms.
-
-=item HP-UX
-
-L<Net::Ping> UDP test is skipped on HP-UX.
-
-=item VMS
-
-Move _pDEPTH and _aDEPTH after config.h otherwise DEBUGGING may not be defined
-yet.
-
-VAXC has not been a possibility for a good long while, and the versions of the
-DEC/Compaq/HP/VSI C compiler that report themselves as "DEC" in a listing file
-are 15 years or more out-of-date and can be safely desupported.
-
-=item VMS And Win32
-
-Fix some breakage, add 'undef' value for default_inc_excludes_dot in build
-scripts.
-
-=item Linux
-
-Drop support for Linux a.out Linux has used ELF for over twenty years.
-
-=item NetBSD-VAX
-
-Test fixes and minor updates.
-
-Account for lack of C<inf>, C<nan>, and C<-0.0> support.
-
-=item Win32
-
-fp definitions have been updated.
-
-=item OpenBSD 6
-
-OpenBSD 6 still does not support returning pid, gid or uid with SA_SIGINFO.
-Make sure this is accounted for.
-
-=item FreeBSD
-
-t/uni/overload.t: Skip hanging test on FreeBSD.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-The meanings of some internal SV flags have been changed
-
-OPpRUNTIME, SVpbm_VALID, SVpbm_TAIL, SvTAIL_on, SvTAIL_off, SVrepl_EVAL,
-SvEVALED
-
-=item *
-
-Change C<hv_fetch(…, "…", …, …)> to C<hv_fetchs(…, "…", …)>
-
-The dual-life dists all use Devel::PPPort, so they can use this function even
-though it was only added in 5.10.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Handle SvIMMORTALs in LHS of list assign. [perl #129991]
-
-=item *
-
-[perl #130010] a5540cf breaks texinfo
-
-This involved user-defined Unicode properties.
-
-=item *
-
-Fix error message for unclosed C<\N{> in regcomp.
-
-An unclosed C<\N{> could give the wrong error message
-C<"\N{NAME} must be resolved by the lexer">.
-
-=item *
-
-List assignment in list context where the LHS contained aggregates and
-where there were not enough RHS elements, used to skip scalar lvalues.
-Previously, C<(($a,$b,@c,$d) = (1))> in list context returned C<($a)>; now
-it returns C<($a,$b,$d)>. C<(($a,$b,$c) = (1))> is unchanged: it still
-returns C<($a,$b,$c)>. This can be seen in the following:
-
- sub inc { $_++ for @_ }
- inc(($a,$b,@c,$d) = (10))
-
-Formerly, the values of C<($a,$b,$d)> would be left as C<(11,undef,undef)>;
-now they are C<(11,1,1)>.
-
-=item *
-
-[perl 129903]
-
-The basic problem is that code like this: /(?{ s!!! })/ can trigger infinite
-recursion on the C stack (not the normal perl stack) when the last successful
-pattern in scope is itself. Since the C stack overflows this manifests as an
-untrappable error/segfault, which then kills perl.
-
-We avoid the segfault by simply forbidding the use of the empty pattern when it
-would resolve to the currently executing pattern.
-
-=item *
-
-[perl 128997] Avoid reading beyond the end of the line buffer when there's a
-short UTF-8 character at the end.
-
-=item *
-
-[perl 129950] fix firstchar bitmap under utf8 with prefix optimisation.
-
-=item *
-
-[perl 129954] Carp/t/arg_string.t: be liberal in f/p formats.
-
-=item *
-
-[perl 129928] make do "a\0b" fail silently instead of throwing.
-
-=item *
-
-[perl 129130] make chdir allocate the stack it needs.
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.7 represents approximately 4 weeks of development since Perl 5.25.6
-and contains approximately 83,000 lines of changes across 630 files from 26
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 13,000 lines of changes to 340 .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 5.25.7:
-
-Aaron Crane, Abigail, Andrew Fresh, Andy Lester, Aristotle Pagaltzis, Chad
-Granum, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan
-Collins, Dave Rolsky, David Mitchell, Hauke D, H.Merijn Brand, Hugo van der
-Sanden, James E Keenan, Jarkko Hietaniemi, Karl Williamson, Lukas Mai, Matthew
-Horsfall, Nicolas R., Stefan Seifert, Steve Hay, Todd Rinaldo, Tony Cook, Yves
-Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5258delta - what is new for perl v5.25.8
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.7 release and the 5.25.8
-release.
-
-If you are upgrading from an earlier release such as 5.25.6, first read
-L<perl5257delta>, which describes differences between 5.25.6 and 5.25.7.
-
-=head1 Core Enhancements
-
-=head2 New Hash Function For 64-bit Builds
-
-We have switched to a hybrid hash function to better balance
-performance for short and long keys.
-
-For short keys, 16 bytes and under, we use an optimised variant of
-One At A Time Hard, and for longer keys we use Siphash 1-3. For very
-long keys this is a big improvement in performance. For shorter keys
-there is a modest improvement.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item * New Faster Hash Function on 64 bit builds
-
-We use a different hash function for short and long keys. This should
-improve performance and security, especially for long keys.
-
-=item * readline is faster
-
-Reading from a file line-by-line with C<readline()> or C<< E<lt>E<gt> >> should
-now typically be faster due to a better implementation of the code that
-searches for the next newline character.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.18 to 2.24.
-
-=item *
-
-L<B::Debug> has been upgraded from version 1.23 to 1.24.
-
-=item *
-
-L<bignum> has been upgraded from version 0.43_01 to 0.47.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.165 to 2.166.
-
-=item *
-
-L<Encode> has been upgraded from version 2.86 to 2.88.
-
-=item *
-
-L<encoding> has been upgraded from version 2.18 to 2.19.
-
-=item *
-
-L<IO> has been upgraded from version 1.37 to 1.38.
-
-=item *
-
-L<Locale::Codes> has been upgraded from version 3.40 to 3.42.
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.999727 to 1.999806.
-
-=item *
-
-L<Math::BigInt::FastCalc> has been upgraded from version 0.42 to 0.5005.
-
-=item *
-
-L<Math::BigRat> has been upgraded from version 0.260804 to 0.2611.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20161120 to 5.20161220.
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.24 to 0.25.
-
-=item *
-
-L<Pod::Simple> has been upgraded from version 3.32 to 3.35.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.75 to 1.76.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302062 to 1.302073.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9740_03 to 1.9741.
-
-=item *
-
-L<Time::Local> has been upgraded from version 1.24 to 1.25.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.18 to 1.19.
-
-=back
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-Zero out the alignment bytes when calculating the bytes for 80-bit C<NaN>
-and C<Inf> to make builds more reproducible. [perl #130133]
-
-=item *
-
-Since 5.18 for testing purposes we have included support for
-building perl with a variety of non-standard, and non-recommended
-hash functions. Since we do not recommend the use of these functions
-we have removed them and their corresponding build options. Specifically
-this includes the following build options:
-
- PERL_HASH_FUNC_SDBM
- PERL_HASH_FUNC_DJB2
- PERL_HASH_FUNC_SUPERFAST
- PERL_HASH_FUNC_MURMUR3
- PERL_HASH_FUNC_ONE_AT_A_TIME
- PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
- PERL_HASH_FUNC_MURMUR_HASH_64A
- PERL_HASH_FUNC_MURMUR_HASH_64B
-
-=back
-
-=head1 Acknowledgements
-
-Perl 5.25.8 represents approximately 4 weeks of development since Perl 5.25.7
-and contains approximately 21,000 lines of changes across 500 files from 19
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 18,000 lines of changes to 340 .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 5.25.8:
-
-Andy Lester, Aristotle Pagaltzis, Chad Granum, Chris 'BinGOs' Williams,
-Christian Hansen, Craig A. Berry, David Mitchell, Hugo van der Sanden, James E
-Keenan, J. Nick Koston, Karl Williamson, Matthew Horsfall, Niko Tyni, Petr
-Písař, Sawyer X, Steve Hay, Sullivan Beck, Tony Cook, Yves Orton.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
+++ /dev/null
-=encoding utf8
-
-=head1 NAME
-
-perl5259delta - what is new for perl v5.25.9
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.25.8 release and the 5.25.9
-release.
-
-If you are upgrading from an earlier release such as 5.25.7, first read
-L<perl5258delta>, which describes differences between 5.25.7 and 5.25.8.
-
-=head1 Core Enhancements
-
-=head2 New regular expression modifier C</xx>
-
-Specifying two C<x> characters to modify a regular expression pattern
-does everything that a single one does, but additionally TAB and SPACE
-characters within a bracketed character class are generally ignored and
-can be added to improve readability, like
-S<C</[ ^ A-Z d-f p-x ]/xx>>. Details are at
-L<perlre/E<sol>x and E<sol>xx>.
-
-=head1 Deprecations
-
-=head2 String delimiters that aren't stand-alone graphemes are now deprecated
-
-In order for Perl to eventually allow string delimiters to be Unicode
-grapheme clusters (which look like a single character, but may be
-a sequence of several ones), we have to stop allowing a single char
-delimiter that isn't a grapheme by itself. These are unlikely to exist
-in actual code, as they would typically display as attached to the
-character in front of them.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-A hash in boolean context is now sometimes faster, e.g.
-
- if (!%h) { ... }
-
-This was already special-cased, but some cases were missed, and even the
-ones which weren't have been improved.
-
-=item *
-
-Several other ops may now also be faster in boolean context.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<attributes> has been upgraded from version 0.28 to 0.29.
-
-The deprecation message for the C<:unique> and C<:locked> attributes
-now mention they will disappear in Perl 5.28.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.39 to 1.40.
-
-=item *
-
-L<B::Xref> has been upgraded from version 1.05 to 1.06.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.069 to 2.070.
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.069 to 2.070.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.14_01 to 2.16.
-
-=item *
-
-L<Data::Dumper> was upgraded from version 2.166 to 2.167.
-
-This fixes a stack management bug. [perl #130487].
-
-=item *
-
-L<DB_File> has been upgraded from version 1.838 to 1.840.
-
-=item *
-
-L<Devel::SelfStubber> has been upgraded from version 1.05 to 1.06.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<diagnostics> has been upgraded from version 1.35 to 1.36.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.40 to 1.41.
-
-=item *
-
-L<Errno> has been upgraded from version 1.27 to 1.28.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<ExtUtils::Embed> has been upgraded from version 1.33 to 1.34.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<feature> has been upgraded from version 1.45 to 1.46.
-
-Fixes the Unicode Bug in the range operator.
-
-=item *
-
-L<File::Glob> has been upgraded from version 1.27 to 1.28.
-
-Issue a deprecation message for C<File::Glob::glob()>.
-
-=item *
-
-L<I18N::LangTags> has been upgraded from version 0.41 to 0.42.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<lib> has been upgraded from version 0.63 to 0.64.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20161220 to 5.20170120.
-
-=item *
-
-L<OS2::Process> has been upgraded from version 1.11 to 1.12.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<overload> has been upgraded from version 1.27 to 1.28.
-
-=item *
-
-L<perl5db.pl> has been upgraded from version 1.50 to 1.51.
-
-Ignore F</dev/tty> on non-Unix systems. [perl #113960]
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.25 to 0.26.
-
-=item *
-
-L<Pod::Html> has been upgraded from version 1.2201 to 1.2202.
-
-=item *
-
-L<re> has been upgraded from version 0.33 to 0.34
-
-This adds support for the new L<C<E<47>xx>|perlre/E<sol>x and E<sol>xx>
-regular expression pattern modifier, and a change to the L<S<C<use re
-'strict'>>|re/'strict' mode> experimental feature. When S<C<re
-'strict'>> is enabled, a warning now will be generated for all
-unescaped uses of the two characters C<}> and C<]> in regular
-expression patterns (outside bracketed character classes) that are taken
-literally. This brings them more in line with the C<)> character which
-is always a metacharacter unless escaped. Being a metacharacter only
-sometimes, depending on action at a distance, can lead to silently
-having the pattern mean something quite different than was intended,
-which the S<C<re 'strict'>> mode is intended to minimize.
-
-=item *
-
-L<Storable> has been upgraded from version 2.59 to 2.61.
-
-Fixes [perl #130098].
-
-=item *
-
-L<Symbol> has been upgraded from version 1.07 to 1.08.
-
-=item *
-
-L<Term::ReadLine> has been upgraded from version 1.15 to 1.16.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<Test> has been upgraded from version 1.29 to 1.30.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<threads> has been upgraded from version 2.10 to 2.12.
-
-Fixes [perl #130469].
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.52 to 1.54.
-
-This fixes [cpan #119529], [perl #130457]
-
-=item *
-
-L<Unicode::UCD> has been upgraded from version 0.67 to 0.68.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<VMS::DCLsym> has been upgraded from version 1.07 to 1.08.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.24 to 0.26.
-
-It now uses 3-arg C<open()> instead of 2-arg C<open()>. [perl #130122]
-
-=back
-
-=head1 Documentation
-
-=head2 New Documentation
-
-=head3 L<perldeprecation>
-
-This file documents all upcoming deprecations, and some of the deprecations
-which already have been removed. The purpose of this documentation is
-two-fold: document what will disappear, and by which version, and serve
-as a guide for people dealing with code which has features that no longer
-work after an upgrade of their perl.
-
-=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>.
-
-=head2 New Diagnostics
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-L<Use of unassigned code point or non-standalone grapheme for a delimiter will be a fatal error starting in Perl v5.30|perldiag/"Use of unassigned code point or non-standalone grapheme for a delimiter will be a fatal error starting in Perl v5.30">
-
-See L</Deprecations>
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-As of Perl 5.25.9, all new deprecations will come with a version in
-which the feature will disappear. And with a few exceptions, most
-existing deprecations will state when they'll disappear. As such, most
-deprecation messages have changed.
-
-=over 4
-
-=item *
-
-Attribute "locked" is deprecated, and will disappear in Perl 5.28
-
-=item *
-
-Attribute "unique" is deprecated, and will disappear in Perl 5.28
-
-=item *
-
-"\c%c" is more clearly written simply as "%s". This will be a fatal error
-in Perl 5.28
-
-=item *
-
-Constants from lexical variables potentially modified elsewhere are
-deprecated. This will not be allowed in Perl 5.32
-
-=item *
-
-Deprecated use of my() in false conditional. This will be a fatal error
-in Perl 5.30
-
-=item *
-
-dump() better written as CORE::dump(). dump() will no longer be available
-in Perl 5.30
-
-=item *
-
-${^ENCODING} is no longer supported. Its use will be fatal in Perl 5.28
-
-=item *
-
-File::Glob::glob() will disappear in perl 5.30. Use File::Glob::bsd_glob()
-instead.
-
-=item *
-
-%s() is deprecated on :utf8 handles. This will be a fatal error in Perl 5.30
-
-=item *
-
-$* is no longer supported. Its use will be fatal in Perl 5.30
-
-=item *
-
-$* is no longer supported. Its use will be fatal in Perl 5.30
-
-=item *
-
-Opening dirhandle %s also as a file. This will be a fatal error in Perl 5.28
-
-=item *
-
-Opening filehandle %s also as a directory. This will be a fatal
-error in Perl 5.28
-
-=item *
-
-Setting $/ to a reference to %s as a form of slurp is deprecated,
-treating as undef. This will be fatal in Perl 5.28
-
-=item *
-
-Unescaped left brace in regex is deprecated here (and will be fatal
-in Perl 5.30), passed through in regex; marked by S<< E<lt>-- HERE >> in m/%s/
-
-=item *
-
-Unknown charname '' is deprecated. Its use will be fatal in Perl 5.28
-
-=item *
-
-Use of bare E<lt>E<lt> to mean E<lt>E<lt>"" is deprecated. Its use will be fatal in Perl 5.28
-
-=item *
-
-Use of code point 0x%s is deprecated; the permissible max is 0x%s.
-This will be fatal in Perl 5.28
-
-=item *
-
-Use of comma-less variable list is deprecated. Its use will be fatal
-in Perl 5.28
-
-=item *
-
-Use of inherited AUTOLOAD for non-method %s() is deprecated. This
-will be fatal in Perl 5.28
-
-=item *
-
-Use of strings with code points over 0xFF as arguments to %s operator
-is deprecated. This will be a fatal error in Perl 5.28
-
-=back
-
-=head1 Utility Changes
-
-=head2 F<c2ph> and F<pstruct>
-
-=over 4
-
-=item *
-
-These old utilities have long since superceded by L<h2xs>, and are
-now gone from the distribution.
-
-=back
-
-=head2 F<Porting/sync-with-cpan>
-
-=over 4
-
-=item *
-
-Many improvements
-
-=back
-
-
-=head1 Configuration and Compilation
-
-=over 4
-
-=item *
-
-The C<dtrace> build process has further changes:
-
-=over
-
-=item *
-
-If the C<-xnolibs> is available, use that so a F<dtrace> perl can be
-built within a FreeBSD jail.
-
-=item *
-
-On systems that build a dtrace object file (FreeBSD, Solaris and
-SystemTap's dtrace emulation), copy the input objects to a separate
-directory and process them there, and use those objects in the link,
-since C<dtrace -G> also modifies these objects.
-
-=item *
-
-Add libelf to the build on FreeBSD 10.x, since dtrace adds references
-to libelf symbols.
-
-=item *
-
-Generate a dummy dtrace_main.o if C<dtrace -G> fails to build it. A
-default build on Solaris generates probes from the unused inline
-functions, while they don't on FreeBSD, which causes C<dtrace -G> to
-fail.
-
-=back
-
-[perl #130108]
-
-=item *
-
-You can now disable perl's use of the PERL_HASH_SEED and
-PERL_PERTURB_KEYS environment variables by configuring perl with
-C<-Accflags=NO_PERL_HASH_ENV>.
-
-=item *
-
-You can now disable perl's use of the PERL_HASH_SEED_DEBUG environment
-variable by configuring perl with
-C<-Accflags=-DNO_PERL_HASH_SEED_DEBUG>.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-New versions of macros like C<isALPHA_utf8> and C<toLOWER_utf8> have
-been added, each with the
-suffix C<_safe>, like C<isSPACE_utf8_safe>. These take an extra
-parameter, giving an upper limit of how far into the string it is safe
-to read. Using the old versions could cause attempts to read beyond the
-end of the input buffer if the UTF-8 is not well-formed, and their use
-now raises a deprecation warning. Details are at
-L<perlapi/Character classification>.
-
-=item *
-
-Calling macros like C<isALPHA_utf8> on malformed UTF-8 have issued a
-deprecation warning since Perl v5.18. They now die.
-Similarly, macros like C<toLOWER_utf8> on malformed UTF-8 now die.
-
-=item *
-
-Calling the functions C<utf8n_to_uvchr> and its derivatives, while
-passing a string length of 0 is now asserted against in DEBUGGING
-builds, and otherwise returns the Unicode REPLACEMENT CHARACTER. If
-you have nothing to decode, you shouldn't call the decode function.
-
-=item *
-
-The functions C<utf8n_to_uvchr> and its derivatives now return the
-Unicode REPLACEMENT CHARACTER if called with UTF-8 that has the overlong
-malformation, and that malformation is allowed by the input parameters.
-This malformation is where the UTF-8 looks valid syntactically, but
-there is a shorter sequence that yields the same code point. This has
-been forbidden since Unicode version 3.1.
-
-=item *
-
-The functions C<utf8n_to_uvchr> and its derivatives now accept an input
-flag to allow the overflow malformation. This malformation is when the
-UTF-8 may be syntactically valid, but the code point it represents is
-not capable of being represented in the word length on the platform.
-What "allowed" means in this case is that the function doesn't return an
-error, and advances the parse pointer to beyond the UTF-8 in question,
-but it returns the Unicode REPLACEMENT CHARACTER as the value of the
-code point (since the real value is not representable).
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-Under C<use utf8>, the entire Perl program is now checked that the UTF-8
-is wellformed. This resolves [perl #126310].
-
-=item *
-
-The range operator C<..> on strings now handles its arguments correctly when in
-the scope of the L<< C<unicode_strings>|feature/"The 'unicode_strings' feature" >>
-feature. The previous behaviour was sufficiently unexpected that we believe no
-correct program could have made use of it.
-
-=item *
-
-The S<split> operator did not ensure enough space was allocated for
-its return value in scalar context. It could then write a single
-pointer immediately beyond the end of the memory block allocated for
-the stack. [perl #130262]
-
-=item *
-
-Using a large code point with the C<W> pack template character with
-the current output position aligned at just the right point could
-cause a write a single zero byte immediately beyond the end of an
-allocated buffer. [perl #129149]
-
-=item *
-
-Supplying the form picture argument as part of the form argument list
-where the picture specifies modifying the argument could cause an
-access to the new freed compiled form. [perl #129125]
-
-=item *
-
-Fix a problem with sort's build-in compare, where it would not sort
-correctly with 64-bit integers, and non-long doubles. [perl #130335]
-
-=item *
-
-Fix issues with /(?{ ... E<lt>E<lt>EOF })/ that broke Method-Signatures. [perl #130398]
-
-=item *
-
-Fix a macro which caused syntax error on an EBCDIC build.
-
-=item *
-
-Prevent tests from getting hung up on 'NonStop' option. [perl #130445]
-
-=item *
-
-Fixed an assertion failure with C<chop> and C<chomp>, which
-could be triggered by C<chop(@x =~ tr/1/1/)>. [perl #130198].
-
-=item *
-
-Fixed a comment skipping error under C</x>; it could stop skipping a
-byte early, which could be in the middle of a UTF-8 character.
-[perl #130495].
-
-=item *
-
-F<perldb> now ignores F</dev/tty> on non-Unix systems. [perl #113960];
-
-=item *
-
-Fix assertion failure for C<{}-E<gt>$x> when C<$x> isn't defined. [perl #130496].
-
-=item *
-
-DragonFly BSD now has support for setproctitle(). [perl #130068].
-
-=item *
-
-Fix an assertion error which could be triggered when lookahead string
-in patterns exceeded a minimum length. [perl #130522].
-
-=item *
-
-Only warn once per literal about a misplaced C<_>. [perl #70878].
-
-=item *
-
-Ensure range-start is set after error in C<tr///>. [perl #129342].
-
-=item *
-
-Don't read past start of string for unmatched backref; otherwise,
-we may have heap buffer overflow. [perl #129377].
-
-=item *
-
-Properly recognize mathematical digit ranges starting at U+1D7E.
-C<use re 'strict'> is supposed to warn if you use a range whose start
-and end digit aren't from the same group of 10. It didn't do that
-for five groups of mathematical digits starting at U+1D7E.
-
-=back
-
-
-=head1 Acknowledgements
-
-Perl 5.25.9 represents approximately 4 weeks of development since Perl 5.25.8
-and contains approximately 24,000 lines of changes across 400 files from 23
-authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 17,000 lines of changes to 220 .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 5.25.9:
-
-Aaron Crane, Abigail, Andreas König, Andy Lester, Aristotle Pagaltzis
-Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan Collins,
-David Mitchell, Father Chrysostomos, Hugo van der Sanden, James E Keenan,
-Jerry D. Hedden, John Lightsey, Karl Williamson, Paul Marquess, Peter Avalos,
-Sawyer X, Steve Hay, Tomasz Konojacki, Tony Cook, Zefram.
-
-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.
-
-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.
-
-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
-
-If you find what you think is a bug, you might check the perl bug database
-at L<https://rt.perl.org/> . There may also be information at
-L<http://www.perl.org/> , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the L<perlbug> program
-included with your release. Be sure to trim your bug down to a tiny but
-sufficient test case. Your bug report, along with the output of C<perl -V>,
-will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
-
-If the bug you are reporting has security implications which make it
-inappropriate to send to a publicly archived mailing list, then see
-L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
-for details of how to report the issue.
-
-=head1 SEE ALSO
-
-The F<Changes> file for an explanation of how to view exhaustive details on
-what changed.
-
-The F<INSTALL> file for how to build Perl.
-
-The F<README> file for general stuff.
-
-The F<Artistic> and F<Copying> files for copyright information.
-
-=cut
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perl5223delta.tex \
perl5240delta.tex \
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https://perl5.git.perl.org / perl5.git / commitdiff