=head1 NAME
-perldelta - what is new for perl v5.34.0
+[ this is a template for a new perldelta file. Any text flagged as XXX needs
+to be processed before release. ]
-=head1 DESCRIPTION
-
-This document describes differences between the 5.32.0 release and the 5.34.0
-release.
-
-If you are upgrading from an earlier release such as 5.30.0, first read
-L<perl5320delta>, which describes differences between 5.30.0 and 5.32.0.
-
-=head1 Core Enhancements
-
-=head2 Experimental Try/Catch Syntax
-
-An initial experimental attempt at providing C<try>/C<catch> notation has
-been added.
-
- use feature 'try';
-
- try {
- a_function();
- }
- catch ($e) {
- warn "An error occurred: $e";
- }
-
-For more information, see L<perlsyn/"Try Catch Exception Handling">.
-
-=head2 C<qr/{,n}/> is now accepted
-
-An empty lower bound is now accepted for regular expression quantifiers,
-like C<{,3}>.
-
-=head2 Blanks freely allowed within but adjacent to curly braces
-
-(in double-quotish contexts and regular expression patterns)
-
-This means you can write things like S<C<\x{ FFFC }>> if you like. This
-applies to all such constructs, namely C<\b{}>, C<\g{}>, C<\k{}>,
-C<\N{}>, C<\o{}>, and C<\x{}>; as well as the regular expression
-quantifier C<{I<m>,I<n>}>. C<\p{}> and C<\P{}> retain their
-already-existing, even looser, rules mandated by the Unicode standard
-(see L<perluniprops/Properties accessible through \p{} and \P{}>).
-
-This ability is in effect regardless of the presence of the C</x>
-regular expression pattern modifier.
-
-Additionally, the comma in a regular expression braced quantifier may
-have blanks (tabs or spaces) before and/or after the comma, like
-S<C<qr/a{ 5, 7 }/>>.
-
-=head2 New octal syntax C<0oI<ddddd>>
-
-It is now possible to specify octal literals with C<0o> prefixes,
-as in C<0o123_456>, parallel to the existing construct to specify
-hexadecimal literal C<0xI<ddddd>> and binary literal C<0bI<ddddd>>.
-Also, the builtin C<oct()> function now accepts this new syntax.
-
-See L<perldata/Scalar value constructors> and L<perlfunc/oct EXPR>.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-Fix a memory leak in RegEx
-[L<GH #18604|https://github.com/Perl/perl5/issues/18604>]
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<ExtUtils::PL2Bat> 0.004 has been added to the Perl core.
-
-This module is a generalization of the C<pl2bat> script. It being a script has
-led to at least two forks of this code; this module will unify them under one
-implementation with tests.
-
-=back
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<Archive::Tar> has been upgraded from version 2.36 to 2.38.
-
-=item *
-
-L<autodie> has been upgraded from version 2.32 to 2.34.
-
-=item *
-
-L<B> has been upgraded from version 1.80 to 1.82.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.54 to 1.56.
-
-=item *
-
-L<bytes> has been upgraded from version 1.07 to 1.08.
-
-=item *
-
-L<Carp> has been upgraded from version 1.50 to 1.52.
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.093 to 2.101.
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.093 to 2.101.
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.32 to 0.33.
-
-=item *
-
-L<CPAN> has been upgraded from version 2.27 to 2.28.
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.174 to 2.179.
-
-=item *
-
-L<DB> has been upgraded from version 1.58 to 1.59.
-
-=item *
-
-L<DB_File> has been upgraded from version 1.853 to 1.855.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.28 to 1.30.
-
-=item *
-
-L<Devel::PPPort> has been upgraded from version 3.57 to 3.62.
-
-New C<PERL_VERSION_*> comparison macros are now available.
-
-C<ppport.h --api-info> no longer includes non-API info unless that is the only
-match
-
-=item *
-
-L<Digest> has been upgraded from version 1.17_01 to 1.19.
-
-=item *
-
-L<Digest::MD5> has been upgraded from version 2.55_01 to 2.58.
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.47 to 1.50.
-
-=item *
-
-L<Encode> has been upgraded from version 3.06 to 3.08.
-
-=item *
-
-L<Env> has been upgraded from version 1.04 to 1.05.
-
-=item *
-
-L<Errno> has been upgraded from version 1.30 to 1.33.
-
-=item *
-
-L<experimental> has been upgraded from version 0.020 to 0.024.
-
-=item *
-
-L<Exporter> has been upgraded from version 5.74 to 5.76.
-
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded from version 0.280234 to 0.280236.
-
-=item *
-
-L<ExtUtils::Install> has been upgraded from version 2.14 to 2.20.
-
-=item *
-
-L<ExtUtils::MakeMaker> has been upgraded from version 7.44 to 7.62.
-
-=item *
-
-L<ExtUtils::Manifest> has been upgraded from version 1.72 to 1.73.
-
-=item *
-
-L<ExtUtils::Miniperl> has been upgraded from version 1.09 to 1.10.
-
-=item *
-
-L<ExtUtils::ParseXS> has been upgraded from version 3.40 to 3.43.
-
-=item *
-
-L<ExtUtils::Typemaps> has been upgraded from version 3.38 to 3.43.
-
-=item *
-
-L<Fcntl> has been upgraded from version 1.13 to 1.14.
-
-=item *
-
-L<feature> has been upgraded from version 1.58 to 1.64.
-
-Added the default enabled C<bareword_filehandles> feature.
-
-A new L<multidimensional|feature/"The 'multidimensional' feature">
-feature has been added, which is enabled by
-default but allows turning off L<multi-dimensional array
-emulation|perldata/Multi-dimensional array emulation>.
-
-=item *
-
-L<File::Copy> has been upgraded from version 2.34 to 2.35.
-
-=item *
-
-L<File::Fetch> has been upgraded from version 0.56 to 1.00.
-
-=item *
-
-L<File::Find> has been upgraded from version 1.37 to 1.39.
-
-=item *
-
-L<File::Path> has been upgraded from version 2.16 to 2.18.
-
-=item *
-
-L<File::Spec> has been upgraded from version 3.78 to 3.80.
-
-=item *
-
-L<File::Temp> has been upgraded from version 0.2309 to 0.2311.
-
-=item *
-
-L<Filter::Util::Call> has been upgraded from version 1.59 to 1.60.
-
-=item *
-
-L<FindBin> has been upgraded from version 1.51 to 1.52.
-
-=item *
-
-L<GDBM_File> has been upgraded from version 1.18 to 1.19.
-
-New functions and compatibility for newer versions of GDBM.
-[L<GH #18435|https://github.com/Perl/perl5/pull/18435>]
-
-=item *
-
-L<Getopt::Long> has been upgraded from version 2.51 to 2.52.
-
-=item *
-
-L<Getopt::Std> has been upgraded from version 1.12 to 1.13.
-
-=item *
-
-L<Hash::Util> has been upgraded from version 0.23 to 0.25.
-
-=item *
-
-L<Hash::Util::FieldHash> has been upgraded from version 1.20 to 1.21.
-
-=item *
-
-L<I18N::LangTags> has been upgraded from version 0.44 to 0.45.
-
-=item *
-
-L<if> has been upgraded from version 0.0608 to 0.0609.
-
-=item *
-
-L<IO> has been upgraded from version 1.43 to 1.46.
-
-IO::Socket now stores error messages in C<$IO::Socket::errstr>, in
-addition to in C<$@>.
-
-The C<error> method now reports the error state for both the input and
-output streams for sockets and character devices. Similarly
-C<clearerr> now clears the error state for both streams.
-
-A spurious error reported for regular file handles has been
-fixed in L<IO::Handle>.
-[L<GH #18019|https://github.com/Perl/perl5/issues/18019>]
-
-=item *
-
-IO-Compress has been upgraded from version 2.093 to 2.102.
-
-bin/zipdetails version 2.02
-
-=item *
-
-L<IO::Socket::IP> has been upgraded from version 0.39 to 0.41.
-
-=item *
-
-L<IO::Zlib> has been upgraded from version 1.10 to 1.11.
-
-=item *
-
-L<IPC::SysV> has been upgraded from version 2.07 to 2.09.
-
-=item *
-
-L<JSON::PP> has been upgraded from version 4.04 to 4.06.
-
-=item *
-
-The libnet distribution has been upgraded from version 3.11 to 3.13.
-
-=item *
-
-L<locale> has been upgraded from version 1.09 to 1.10.
-
-=item *
-
-L<Math::Complex> has been upgraded from version 1.5901 to 1.5902.
-
-=item *
-
-L<MIME::Base64> has been upgraded from version 3.15 to 3.16.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 5.20200620 to 5.20210520.
-
-=item *
-
-L<Module::Load> has been upgraded from version 0.34 to 0.36.
-
-=item *
-
-L<Module::Load::Conditional> has been upgraded from version 0.70 to 0.74.
-
-=item *
-
-L<mro> has been upgraded from version 1.23 to 1.25_001.
-
-=item *
-
-L<Net::Ping> has been upgraded from version 2.72 to 2.74.
-
-=item *
-
-L<NEXT> has been upgraded from version 0.67_01 to 0.68.
-
-=item *
-
-L<ODBM_File> has been upgraded from version 1.16 to 1.17.
-
-=item *
-
-L<Opcode> has been upgraded from version 1.47 to 1.50.
-
-=item *
-
-L<overload> has been upgraded from version 1.31 to 1.33.
-
-=item *
-
-L<perlfaq> has been upgraded from version 5.20200523 to 5.20210411.
-
-=item *
-
-L<PerlIO::encoding> has been upgraded from version 0.28 to 0.30.
-
-=item *
-
-L<PerlIO::mmap> has been upgraded from version 0.016 to 0.017.
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.30 to 0.31.
-
-=item *
-
-L<PerlIO::via::QuotedPrint> has been upgraded from version 0.08 to 0.09.
-
-=item *
-
-L<Pod::Checker> has been upgraded from version 1.73 to 1.74.
-
-=item *
-
-L<Pod::Html> has been upgraded from version 1.25 to 1.27.
-
-=item *
-
-L<Pod::Simple> has been upgraded from version 3.40 to 3.42.
-
-=item *
-
-L<Pod::Usage> has been upgraded from version 1.69 to 2.01.
-
-=item *
-
-L<POSIX> has been upgraded from version 1.94 to 1.97.
-
-POSIX::signbit() behaviour has been improved.
-[L<GH #18441|https://github.com/Perl/perl5/pull/18441>]
-
-Documentation for C<asctime> clarifies that the result is always in English.
-(Use C<strftime> for a localized result.)
-
-=item *
-
-L<re> has been upgraded from version 0.40 to 0.41.
-
-(See under L</Internal Changes> for more information.)
-
-=item *
-
-L<Safe> has been upgraded from version 2.41 to 2.43.
-
-=item *
-
-L<Socket> has been upgraded from version 2.029 to 2.031.
-
-=item *
-
-L<Storable> has been upgraded from version 3.21 to 3.23.
-
-=item *
-
-L<strict> has been upgraded from version 1.11 to 1.12.
-
-=item *
-
-L<subs> has been upgraded from version 1.03 to 1.04.
-
-=item *
-
-L<Symbol> has been upgraded from version 1.08 to 1.09.
-
-=item *
-
-L<Test::Harness> has been upgraded from version 3.42 to 3.43.
-
-=item *
-
-L<Test::Simple> has been upgraded from version 1.302175 to 1.302183.
-
-=item *
-
-L<Text::Balanced> has been upgraded from version 2.03 to 2.04.
-
-=item *
-
-L<threads> has been upgraded from version 2.25 to 2.26.
-
-=item *
-
-L<threads::shared> has been upgraded from version 1.61 to 1.62.
-
-=item *
-
-L<Tie::RefHash> has been upgraded from version 1.39 to 1.40.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9764 to 1.9767.
-
-=item *
-
-L<Time::Local> has been upgraded from version 1.28 to 1.30.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 1.27 to 1.29.
-
-=item *
-
-L<Unicode::Normalize> has been upgraded from version 1.27 to 1.28.
-
-=item *
-
-L<utf8> has been upgraded from version 1.22 to 1.24.
-
-=item *
-
-L<version> has been upgraded from version 0.9924 to 0.9928.
-
-=item *
-
-L<warnings> has been upgraded from version 1.47 to 1.51.
-
-=item *
-
-L<Win32> has been upgraded from version 0.53 to 0.57.
-
-Fix calling convention for C<PFNRegGetValueA>.
-
-Added C<Win32::IsSymlinkCreationAllowed()>,
-C<Win32::IsDeveloperModeEnabled()>, and C<Win32::GetProcessPrivileges()>.
-
-Removed old code for versions before Windows 2000.
-
-=item *
-
-L<XS::APItest> has been upgraded from version 1.09 to 1.16.
-
-=item *
-
-L<XS::Typemap> has been upgraded from version 0.17 to 0.18.
-
-=back
-
-=head1 Documentation
-
-=head2 New Documentation
-
-=head3 L<perldocstyle>
-
-This document is a guide for the authorship and maintenance of the
-documentation that ships with Perl.
-
-=head3 L<perlgov>
-
-This document describes the goals, scope, system, and rules for Perl's new
-governance model.
-
-Other pod files, most notably L<perlpolicy>, were amended to reflect
-its adoption.
-
-=head2 Changes to Existing Documentation
-
-We have attempted to update the documentation to reflect the changes
-listed in this document. If you find any we have missed, open an issue
-at L<https://github.com/Perl/perl5/issues>.
-
-Additionally, the following selected changes have been made:
-
-=over 4
-
-=item *
-
-L<perlapi>, L<perlguts>, L<perlxs>, and L<perlxstut> now prefer C<SvPVbyte>
-over C<SvPV>.
-
-=item *
-
-References to B<Pumpking> have been replaced with a more accurate term or
-B<Steering Council> where appropriate.
-
-=item *
-
-B<The Perl Steering Council> is now the fallback contact for security issues.
-
-=back
-
-=head3 L<perlapi>
-
-=over 4
-
-=item *
-
-Efforts continue in improving the presentation of this document, and to
-document more API elements.
-
-=back
-
-=head3 L<perlcommunity>
-
-=over 4
-
-=item *
-
-The freenode IRC URL has been updated.
-
-=back
-
-=head3 L<perldebguts>
-
-=over 4
+perldelta - what is new for perl v5.35.3
-=item *
+=head1 DESCRIPTION
-Corrected the description of the scalar C<< ${"_<$filename"} >>
-variables.
+This document describes differences between the 5.35.2 release and the 5.35.3
+release.
-=back
+If you are upgrading from an earlier release such as 5.35.1, first read
+L<perl5352delta>, which describes differences between 5.35.1 and 5.35.2.
-=head3 L<perldiag>
+=head1 Notice
-=over 4
+XXX Any important notices here
-=item *
+=head1 Core Enhancements
-Now documents additional examples of "not imported" warnings.
+XXX New core language features go here. Summarize user-visible core language
+enhancements. Particularly prominent performance optimisations could go
+here, but most should go in the L</Performance Enhancements> section.
-=back
+[ List each enhancement as a =head2 entry ]
-=head3 L<perlfaq>
+=head1 Security
-=over 4
+XXX Any security-related notices go here. In particular, any security
+vulnerabilities closed should be noted here rather than in the
+L</Selected Bug Fixes> section.
-=item *
+[ List each security issue as a =head2 entry ]
-The Perl FAQ was updated to CPAN version 5.20201107 with minor
-improvements.
+=head1 Incompatible Changes
-=back
+XXX For a release on a stable branch, this section aspires to be:
-=head3 L<perlfunc>
+ There are no changes intentionally incompatible with 5.XXX.XXX
+ If any exist, they are bugs, and we request that you submit a
+ report. See L</Reporting Bugs> below.
-=over 4
+[ List each incompatible change as a =head2 entry ]
-=item *
+=head1 Deprecations
-L<my()|perlfunc/my> and L<state()|perlfunc/state> now explicitly warn
-the reader that lexical variables should typically not be redeclared
-within the same scope or statement.
-[L<GH #18389|https://github.com/Perl/perl5/issues/18389>]
+XXX Any deprecated features, syntax, modules etc. should be listed here.
-=item *
+=head2 Module removals
-The L<localtime|perlfunc/localtime> entry has been improved and now
-also states that the result of the function is always in English.
+XXX Remove this section if not applicable.
-=item *
+The following modules will be removed from the core distribution in a
+future release, and will at that time need to be installed from CPAN.
+Distributions on CPAN which require these modules will need to list them as
+prerequisites.
-L<msgsnd()|perlfunc/msgsnd> documented a length field included in the
-packed C<MSG> parameter to C<msgsnd()>, but there was no such field.
-C<MSG> contains only the type and the message content.
+The core versions of these modules will now issue C<"deprecated">-category
+warnings to alert you to this fact. To silence these deprecation warnings,
+install the modules in question from CPAN.
-=item *
+Note that these are (with rare exceptions) fine modules that you are encouraged
+to continue to use. Their disinclusion from core primarily hinges on their
+necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
+not usually on concerns over their design.
-Better explanation of what happens when C<sleep> is called with a zero or
-negative value.
+=over
-=item *
+=item XXX
-Simplify the C<split()> documentation by removing the C<join()>s from the
-examples
-[L<GH #18676|https://github.com/Perl/perl5/issues/18676>]
+XXX Note that deprecated modules should be listed here even if they are listed
+as an updated module in the L</Modules and Pragmata> section.
=back
-=head3 L<perlgit>
+[ List each other deprecation as a =head2 entry ]
-=over 4
+=head1 Performance Enhancements
-=item *
+XXX Changes which enhance performance without changing behaviour go here.
+There may well be none in a stable release.
+
+[ List each enhancement as an =item entry ]
-document how to create a remote-tracking branch for every PR
+=over 4
=item *
-document how to get a PR as a local branch
+XXX
=back
-=head3 L<perlguts>
+=head1 Modules and Pragmata
-=over 4
+XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
+go here. If Module::CoreList is updated, generate an initial draft of the
+following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
+for important changes should then be added by hand. In an ideal world,
+dual-life modules would have a F<Changes> file that could be cribbed.
-=item *
+The list of new and updated modules is modified automatically as part of
+preparing a Perl release, so the only reason to manually add entries here is if
+you're summarising the important changes in the module update. (Also, if the
+manually-added details don't match the automatically-generated ones, the
+release manager will have to investigate the situation carefully.)
-L<perlguts> now explains in greater detail the need to consult C<SvUTF8>
-when calling C<SvPV> (or variants). A new "How do I pass a Perl string to a C
-library?" section in the same document discusses when to use which style of
-macro to read an SV's string value.
+[ Within each section, list entries as an =item entry ]
-=item *
+=head2 New Modules and Pragmata
-Corrected C<my_rpeep> example in perlguts.
+=over 4
=item *
-A section has been added on the formatted printing of special sizes.
+XXX Remove this section if not applicable.
=back
-=head3 L<perlop>
+=head2 Updated Modules and Pragmata
=over 4
=item *
-The C<< <> >> and C<<< <<>> >>> operators are commonly referred to as
-the diamond and double diamond operators respectively, but that wasn't
-mentioned previously in their documentation.
-
-=item *
+L<XXX> has been upgraded from version A.xx to B.yy.
-Document range op behavior change.
+If there was something important to note about this change, include that here.
=back
-=head3 L<perlpacktut>
+=head2 Removed Modules and Pragmata
=over 4
=item *
-Incorrect variables used in an example have been fixed.
+XXX
=back
-=head3 L<perlsyn>
+=head1 Documentation
-=over 4
+XXX Changes to files in F<pod/> go here. Consider grouping entries by
+file and be sure to link to the appropriate page, e.g. L<perlfunc>.
-=item *
+=head2 New Documentation
-Document that caller() does not see try{} blocks
+XXX Changes which create B<new> files in F<pod/> go here.
-=item *
+=head3 L<XXX>
-A new example shows how a lexical C<my> variable can be declared
-during the initialization of a C<for> loop.
+XXX Description of the purpose of the new file here
-=back
+=head2 Changes to Existing Documentation
+
+We have attempted to update the documentation to reflect the changes
+listed in this document. If you find any we have missed, open an issue
+at L<https://github.com/Perl/perl5/issues>.
+
+XXX Changes which significantly change existing files in F<pod/> go here.
+However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
+section.
-=head3 L<perlunifaq>
+Additionally, the following selected changes have been made:
+
+=head3 L<XXX>
=over 4
=item *
-Fix description of what Perl does with unencoded strings
+XXX Description of the change here
=back
including warnings and fatal error messages. For the complete list of
diagnostic messages, see L<perldiag>.
+XXX New or changed warnings emitted by the core's C<C> code go here. Also
+include any changes in L<perldiag> that reconcile it to the C<C> code.
+
=head2 New Diagnostics
+XXX Newly added diagnostic messages go under here, separated into New Errors
+and New Warnings
+
=head3 New Errors
=over 4
=item *
-L<Bareword filehandle "%s" not allowed under 'no feature "bareword_filehandles"'|perldiag/"Bareword filehandle "%s" not allowed under 'no feature "bareword_filehandles"'">
-
-This accompanies the new
-L<bareword_filehandles|feature/"The 'bareword_filehandles' feature."> feature.
-
-=item *
-
-L<Multidimensional hash lookup is disabled|perldiag/"Multidimensional hash lookup is disabled">
-
-This accompanies the new
-L<multidimensional|feature/"The 'multidimensional' feature"> feature.
+XXX L<message|perldiag/"message">
=back
=item *
-L<Wide character in setenv key (encoding to utf8)|perldiag/"Wide character in %s">
-
-Attempts to put wide characters into environment variable keys via C<%ENV> now
-provoke this warning.
+XXX L<message|perldiag/"message">
=back
=head2 Changes to Existing Diagnostics
-=over 4
-
-=item *
-
-L<Error %s in expansion of %s|perldiag/"Error %s in expansion of %s">
-
-An error was encountered in handling a user-defined property
-(L<perlunicode/User-Defined Character Properties>). These are
-programmer written subroutines, hence subject to errors that may
-prevent them from compiling or running.
-
-=item *
-
-L<Infinite recursion in user-defined property|perldiag/"Infinite recursion in user-defined property">
-
-A user-defined property (L<perlunicode/User-Defined Character Properties>)
-can depend on the definitions of other user-defined
-properties. If the chain of dependencies leads back to this property,
-infinite recursion would occur, were it not for the check that raised
-this error.
-
-=item *
-
-L<Timeout waiting for another thread to define \p{%s}|perldiag/"Timeout waiting for another thread to define \p{%s}">
-
-The first time a user-defined property
-(L<perlunicode/User-Defined Character Properties>) is used, its
-definition is looked up and converted into an internal form for more
-efficient handling in subsequent uses. There could be a race if two or
-more threads tried to do this processing nearly simultaneously.
-
-=item *
-
-L<Unknown user-defined property name \p{%s}|perldiag/"Unknown user-defined property name \p{%s}">
-
-You specified to use a property within the C<\p{...}> which was a
-syntactically valid user-defined property, but no definition was found
-for it
-
-=item *
-
-L<Too few arguments for subroutine '%s' (got %d; expected %d)|perldiag/"Too few arguments for subroutine '%s' (got %d; expected %d)">
-
-Subroutine argument-count mismatch errors now include the number of
-given and expected arguments.
-
-=item *
-
-L<Too many arguments for subroutine '%s' (got %d; expected %d)|perldiag/"Too many arguments for subroutine '%s' (got %d; expected %d)">
-
-Subroutine argument-count mismatch errors now include the number of
-given and expected arguments.
-
-=item *
-
-L<Lost precision when %s %f by 1|perldiag/"Lost precision when %s %f by 1">
-
-This warning was only issued for positive too-large values when
-incrementing, and only for negative ones when decrementing.
-It is now issued for both positive or negative too-large values.
-[L<GH #18333|https://github.com/Perl/perl5/issues/18333>]
-
-=item *
-
-L<\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"\K not permitted in lookahead/lookbehind in regex; marked by <-- HERE in m/%s/">
+XXX Changes (i.e. rewording) of diagnostic messages go here
-This error was incorrectly produced in some cases involving nested
-lookarounds. This has been fixed.
-[L<GH #18123|https://github.com/Perl/perl5/issues/18123>]
+=over 4
=item *
-L<Use of uninitialized value%s|perldiag/"Use of uninitialized value%s">
-
-This warning may now include the array or hash index when the
-uninitialized value is the result of an element not found. This will
-only happen if the index is a simple non-magical variable.
+XXX Describe change here
=back
=head1 Utility Changes
-=head2 L<perl5db.pl> (the debugger)
+XXX Changes to installed programs such as F<perldoc> and F<xsubpp> go here.
+Most of these are built within the directory F<utils>.
-=over 4
-
-=item * New option: C<HistItemMinLength>
-
-This option controls the minimum length a command must be to get stored in
-history. Traditionally, this has been fixed at 2. Changes to the debugger
-are often perilous, and new bugs should be reported so the debugger can be
-debugged.
-
-=item * Fix to C<i> and C<l> commands
+[ List utility changes as a =head2 entry for each utility and =item
+entries for each change
+Use L<XXX> with program names to get proper documentation linking. ]
-The C<i $var> and C<l $var> commands work again with lexical variables.
-
-=back
-
-=head1 Configuration and Compilation
+=head2 L<XXX>
=over 4
=item *
-Prevented incpath to spill into libpth
+XXX
-=item *
-
-Use realpath if available. (This might catch more duplicate paths.)
-
-=item *
-
-Only include real existing paths.
-
-=item *
-
-Filter inc paths out of libpth.
-
-=item * stadtx hash support has been removed
-
-stadtx support has been entirely removed. Previously, it could be requested
-with C<PERL_HASH_FUNC_STADTX>, and was default in 64-bit builds. It has been
-replaced with SipHash. SipHash has been more rigorously reviewed than stadtx.
-
-=item * Configure
-
-A new probe checks for buggy libc implementations of the C<gcvt>/C<qgcvt>
-functions.
-[L<GH #18170|https://github.com/Perl/perl5/issues/18170>]
-
-=item * C<-Dusedefaultstrict>
-
-Perl can now be built with L<strict> on by default (using the configuration
-option C<-Dusedefaultstrict>.
+=back
-These strict defaults do not apply when C<perl> is run via C<-e> or C<-E>.
+=head1 Configuration and Compilation
-This setting provides a diagnostic mechanism intended for development
-purposes only and is thus undefined by default.
+XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
+go here. Any other changes to the Perl build process should be listed here.
+However, any platform-specific changes should be listed in the
+L</Platform Support> section, instead.
-=item *
+[ List changes as an =item entry ].
-The minimum supported Bison version is now 2.4, and the maximum is 3.7.
+=over 4
=item *
-Newer 64-bit versions of the Intel C/C++ compiler are now recognised
-and have the correct flags set.
+XXX
-=item *
+=back
-We now trap SIGBUS when F<Configure> checks for C<va_copy>.
+=head1 Testing
-On several systems the attempt to determine if we need C<va_copy> or similar
-results in a SIGBUS instead of the expected SIGSEGV, which previously caused a
-core dump.
+XXX Any significant changes to the testing of a freshly built perl should be
+listed here. Changes which create B<new> files in F<t/> go here as do any
+large changes to the testing harness (e.g. when parallel testing was added).
+Changes to existing files in F<t/> aren't worth summarizing, although the bugs
+that they represent may be covered elsewhere.
-[L<GH #18148|https://github.com/Perl/perl5/issues/18148>]
+XXX If there were no significant test changes, say this:
-=back
+Tests were added and changed to reflect the other additions and changes
+in this release.
-=head1 Testing
+XXX If instead there were significant changes, say this:
Tests were added and changed to reflect the other additions and
changes in this release. Furthermore, these significant changes were
made:
-=over 4
-
-=item *
-
-Split Config-dependent tests in F<t/opbasic/arith.t> to F<t/op/arith2.t>
-
-=item *
-
-F<t/re/opt.t> was added, providing a test harness for regexp optimization.
-[L<GH #18213|https://github.com/Perl/perl5/pull/18213>]
-
-=item *
+[ List each test improvement as an =item entry ]
-A workaround for CPAN distributions needing dot in C<@INC> has been removed
-[L<GH #18394|https://github.com/Perl/perl5/pull/18394>].
-All distributions that previously required the workaround have now been
-adapted.
+=over 4
=item *
-When testing in parallel on many-core platforms, you can now cause the
-test suite to finish somewhat earlier, but with less logical ordering of
-the tests, by setting
-
- PERL_TEST_HARNESS_ASAP=1
-
-while running the test suite.
+XXX
=back
=head1 Platform Support
-=head2 New Platforms
-
-=over 4
-
-=item 9front
+XXX Any changes to platform support should be listed in the sections below.
-Allow building Perl on i386 9front systems (a fork of plan9).
+[ Within the sections, list each platform as an =item entry with specific
+changes as paragraphs below it. ]
-=back
+=head2 New Platforms
-=head2 Updated Platforms
+XXX List any platforms that this version of perl compiles on, that previous
+versions did not. These will either be enabled by new files in the F<hints/>
+directories, or new subdirectories and F<README> files at the top level of the
+source tree.
=over 4
-=item Plan9
-
-Improve support for Plan9 on i386 platforms.
+=item XXX-some-platform
-=item MacOS (Darwin)
-
-The hints file for darwin has been updated to handle future MacOS versions
-beyond 10. [L<GH #17946|https://github.com/Perl/perl5/issues/17946>]
+XXX
=back
=head2 Discontinued Platforms
+XXX List any platforms that this version of perl no longer compiles on.
+
=over 4
-=item Symbian
+=item XXX-some-platform
-Support code relating to Symbian has been removed. Symbian was an
-operating system for mobile devices. The port was last updated in July
-2009, and the platform itself in October 2012.
+XXX
=back
=head2 Platform-Specific Notes
-=over 4
-
-=item DragonFlyBSD
-
-Tests were updated to workaround DragonFlyBSD bugs in L<tc*()
-functions|https://bugs.dragonflybsd.org/issues/3252> and L<ctime
-updates|https://bugs.dragonflybsd.org/issues/3251>.
-
-=item Mac OS X
-
-A number of system libraries no longer exist as actual files on Big Sur,
-even though C<dlopen> will pretend they do, so now we fall back to C<dlopen>
-if a library file can not be found.
-[L<GH #18407|https://github.com/Perl/perl5/issues/18407>]
-
-=item Windows
-
-Reading non-ASCII characters from the console when its codepage was set to
-65001 (UTF-8) was broken due to a bug in Windows. A workaround for this
-problem has been implemented.
-[L<GH #18701|https://github.com/Perl/perl5/issues/18701>]
-
-Building with mingw.org compilers (version 3.4.5 or later) using mingw runtime
-versions < 3.22 now works again. This was broken in Perl 5.31.4.
-
-Building with mingw.org compilers (version 3.4.5 or later) using mingw runtime
-versions >= 3.21 now works (for compilers up to version 5.3.0).
-
-F<Makefile.mk>, and thus support for dmake, has been removed. It is still
-possible to build Perl on Windows using nmake (Makefile) and GNU make
-(GNUmakefile).
-[L<GH #18511|https://github.com/Perl/perl5/pull/18511>]
-
-perl can now be built with C<USE_QUADMATH> on MS Windows using
-(32-bit and 64-bit) mingw-w64 ports of gcc.
-[L<GH #18465|https://github.com/Perl/perl5/pull/18465>]
-
-The F<pl2bat.pl> utility now needs to C<use ExtUtils::PL2Bat>. This could
-cause failures in parallel builds.
-
-Windows now supports L<symlink()|perlfunc/symlink> and
-L<readlink()|perlfunc/readlink>, and L<lstat()|perlfunc/lstat> is no
-longer an alias for L<stat()|perlfunc/stat>.
-[L<GH #18005|https://github.com/Perl/perl5/issues/18005>].
-
-Unlike POSIX systems, creating a symbolic link on Windows requires
-either elevated privileges or Windows 10 1703 or later with Developer
-Mode enabled.
-
-stat(), including C<stat FILEHANDLE>, and lstat() now uses our own
-implementation that populates the device C<dev> and inode numbers
-C<ino> returned rather than always returning zero. The number of
-links C<nlink> field is now always populated.
-
-L<< C<${^WIN32_SLOPPY_STAT}> |perlvar/${^WIN32_SLOPPY_STAT} >> previously
-controlled whether the C<nlink> field was populated requiring a
-separate Windows API call to fetch, since C<nlink> and the other
-information required for C<stat()> is now retrieved in a single API call.
-
-The C<-r> and C<-w> operators now return true for the C<STDIN>,
-C<STDOUT> and C<STDERR> handles. Unfortunately it still won't return
-true for duplicates of those handles.
-[L<GH #8502|https://github.com/Perl/perl5/issues/8502>].
-
-The times returned by stat() and lstat() are no longer incorrect
-across Daylight Savings Time adjustments.
-[L<GH #6080|https://github.com/Perl/perl5/issues/6080>].
-
-C<-x> on a filehandle should now match C<-x> on the corresponding
-filename on Vista or later.
-[L<GH #4145|https://github.com/Perl/perl5/issues/4145>].
-
-C<-e '"'> no longer incorrectly returns true.
-[L<GH #12431|https://github.com/Perl/perl5/issues/12431>].
+XXX List any changes for specific platforms. This could include configuration
+and compilation changes or changes in portability/compatibility. However,
+changes within modules for platforms should generally be listed in the
+L</Modules and Pragmata> section.
-The same manifest is now used for Visual C++ and gcc builds.
-
-Previously, MSVC builds were using the B</manifestdependency> flag instead of
-embedding F<perlexe.manifest>, which caused issues such as C<GetVersionEx()>
-returning the wrong version number on Windows 10.
+=over 4
-=item z/OS
+=item XXX-some-platform
-The locale categories C<LC_SYNTAX> and C<LC_TOD> are now recognized.
-Perl doesn't do anything with these, except it now allows you to specify
-them. They are included in C<LC_ALL>.
+XXX
=back
=head1 Internal Changes
-=over 4
-
-=item *
-
-Corrected handling of double and long double parameters for perl's
-implementation of formatted output for C<-Dusequadmath> builds.
-
-This applies to C<PerlIO_printf()>, C<croak()>, C<warn()>, C<sv_catpvf()> and
-their variants.
-
-Previously in C<quadmath> builds, code like:
-
- PerlIO_printf(PerlIO_stderr(), "%g", somedouble);
-
-or
-
- PerlIO_printf(PerlIO_stderr(), "%Lg", somelongdouble);
-
-would erroneously throw an exception "panic: quadmath invalid format
-...", since the code added for quadmath builds assumed C<NV>s were the
-only floating point format passed into these functions.
-
-This code would also process the standard C long double specifier C<L>
-as if it expected an C<NV> (C<__float128> for quadmath builds),
-resulting in undefined behaviour.
-
-These functions now correctly accept doubles, long doubles and NVs.
-
-=item *
-
-Previously the right operand of bitwise shift operators (shift amount)
-was implicitly cast from IV to int, but it might lead wrong results
-if IV does not fit in int.
-
-And also, shifting INT_MIN bits used to yield the shiftee unchanged
-(treated as 0-bit shift instead of negative shift).
-
-=item *
-
-A set of C<cop_hints_exists_{pv,pvn,pvs,sv}> functions was added,
-to support checking for the existence of keys in the hints hash of a
-specific cop without needing to create a mortal copy of said value.
-
-=item *
-
-An aid has been added for using the C<DEBUG> macros when debugging XS or
-C code. The comments in F<perl.h> describe C<DEBUG_PRE_STMTS> and
-C<DEBUG_POST_STMTS>. which you can C<#define> to do things like save and
-restore C<errno>, in case the C<DEBUG> calls are interfering with that,
-or to display timestamps, or which thread it's coming from, or the
-location of the call, or whatever. You can make a quick hack to help
-you track something down without having to edit individual C<DEBUG>
-calls.
-
-=item *
-
-Make C<REFCOUNTED_HE_EXISTS> available outside of core
-
-=item *
-
-All C<SvTRUE>-ish functions now evaluate their arguments exactly once.
-In 5.32, plain L<perlapi/C<SvTRUE>> was changed to do that; now the rest
-do as well.
-
-=item *
-
-Unicode is now a first class citizen when considering the pattern /A*B/ where
-A and B are arbitrary. The pattern matching code tries to make a tight loop
-to match the span of A's. The logic of this was now really updated with
-support for UTF-8.
-
-=item *
-
-The L<re> module has a new function C<optimization>, which can return a
-hashref of optimization data discovered about a compiled regexp.
+XXX Changes which affect the interface available to C<XS> code go here. Other
+significant internal changes for future core maintainers should be noted as
+well.
-=item *
-
-The C<PERL_GLOBAL_STRUCT> compilation option has been removed, and
-with it the need or the C<dVAR> macro. C<dVAR> remains defined as a
-no-op outside C<PERL_CORE> for backwards compatiblity with XS modules.
-
-=item *
+[ List each change as an =item entry ]
-A new savestack type C<SAVEt_HINTS_HH> has been added, which neatens the
-previous behaviour of C<SAVEt_HINTS>. On previous versions the types and
-values pushed to the save stack would depend on whether the hints included the
-C<HINT_LOCALIZE_HH> bit, which complicates external code that inspects the
-save stack. The new version uses a different savestack type to indicate the
-difference.
+=over 4
=item *
-A new API function L<perlapi/av_count> has been added which gives a
-clearly named way to find how many elements are in an array.
+XXX
=back
=head1 Selected Bug Fixes
-=over 4
-
-=item *
-
-Setting C<%ENV> now properly handles upgraded strings in the key. Previously
-Perl sent the SV's internal PV directly to the OS; now it will handle keys
-as it has handled values since 5.18: attempt to downgrade the string first;
-if that fails then warn and use the utf8 form.
-
-=item *
-
-Fix a memory leak in regcomp.c
-[L<GH #18604|https://github.com/Perl/perl5/issues/18604>]
-
-=item * pack/unpack format 'D' now works on all systems that could support it
-
-Previously if C<NV == long double>, now it is supported on all platforms that
-have long doubles. In particular that means it is now also supported on
-quadmath platforms.
-
-=item *
-
-Skip trying to constant fold an incomplete op tree
-[L<GH #18380|https://github.com/Perl/perl5/issues/18380>]
-
-Constant folding of chained comparison op trees could fail under certain
-conditions, causing perl to crash. As a quick fix, constant folding is
-now skipped for such op trees. This also addresses
-[L<GH #17917|https://github.com/Perl/perl5/issues/17917>].
-
-=item *
-
-C<%g> formatting broken on Ubuntu-18.04, C<NVSIZE == 8>
-[L<GH #18170|https://github.com/Perl/perl5/issues/18170>]
-
-Buggy libc implementations of the C<gcvt> and C<qgcvt> functions
-caused C<(s)printf> to incorrectly truncate C<%g> formatted numbers.
-A new Configure probe now checks for this, with the result that the libc
-C<sprintf> will be used in place of C<gcvt> and C<qgcvt>.
-
-Tests added as part of this fix also revealed related problems in
-some Windows builds. The makefiles for MINGW builds on Windows have
-thus been adjusted to use C<USE_MINGW_ANSI_STDIO> by default, ensuring
-that they also provide correct C<(s)printf> formatting of numbers.
-
-=item *
-
-F<op.c>: croak on C<my $_> when C<use utf8> is in effect
-[L<GH #18449|https://github.com/Perl/perl5/issues/18449>]
-
-The lexical topic feature experiment was removed in Perl v5.24 and
-declaring C<my $_> became a compile time error. However, it was previously
-still possible to make this declaration if C<use utf8> was in effect.
-
-=item *
-
-F<regexec.c>: Fix assertion failure
-[L<GH #18451|https://github.com/Perl/perl5/issues/18451>]
-
-Fuzzing triggered an assertion failure in the regexp engine when too many
-characters were copied into a buffer.
-
-=item *
-
-L<semctl()|perlfunc/semctl>, L<msgctl()|perlfunc/msgctl>, and
-L<shmctl()|perlfunc/shmctl> now properly reset the UTF-8 flag on the
-C<ARG> parameter if it's modified for C<IPC_STAT> or C<GETALL>
-operations.
-
-=item *
+XXX Important bug fixes in the core language are summarized here. Bug fixes in
+files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
-C<semctl()>, C<msgctl()>, and C<shmctl()> now attempt to downgrade the C<ARG>
-parameter if its value is being used as input to C<IPC_SET> or
-C<SETALL> calls. A failed downgrade will thrown an exception.
+[ List each fix as an =item entry ]
-=item *
-
-In cases where C<semctl()>, C<msgctl()> or C<shmctl()> would treat the C<ARG>
-parameter as a pointer, an undefined value no longer generates a
-warning. In most such calls the pointer isn't used anyway and this
-allows you to supply C<undef> for a value not used by the underlying
-function.
+=over 4
=item *
-L<semop()|perlfunc/semop> now downgrades the C<OPSTRING> parameter,
-L<msgsnd()|perlfunc/msgsnd> now downgrades the C<MSG> parameter and
-L<shmwrite|perlfunc/shmwrite> now downgrades the C<STRING> parameter
-to treat them as bytes. Previously they would be left upgraded,
-providing a corrupted structure to the underlying function call.
-
-=item *
+XXX
-L<msgrcv()|perlfunc/msgrcv> now properly resets the UTF-8 flag the
-C<VAR> parameter when it is modified. Previously the UTF-8 flag could
-be left on, resulting in a possibly corrupt result in C<VAR>.
+=back
-=item *
+=head1 Known Problems
-Magic is now called correctly for stacked file test operators.
-[L<GH #18293|https://github.com/Perl/perl5/issues/18293>]
+XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
+tests that had to be C<TODO>ed for the release would be noted here. Unfixed
+platform specific bugs also go here.
-=item *
+[ List each fix as an =item entry ]
-The C<@ary = split(...)> optimization no longer switches in the target
-array as the value stack.
-[L<GH #18232|https://github.com/Perl/perl5/issues/18232>]
-Also see discussion at
-L<https://github.com/Perl/perl5/pull/18014#issuecomment-671299506>.
+=over 4
=item *
-Fixed a bug in which some regexps with recursive subpatterns matched
-incorrectly.
-
-[L<GH #18096|https://github.com/Perl/perl5/issues/18096>]
-
-=item *
+XXX
-On Win32, C<waitpid(-1, WNOHANG)> could sometimes have a very large
-timeout. [L<GH #16529|https://github.com/Perl/perl5/issues/16529>]
+=back
-=item *
+=head1 Errata From Previous Releases
-C<MARK> and hence C<items> are now correctly initialized in C<BOOT> XSUBs.
+=over 4
=item *
-Some list assignments involving C<undef> on the left-hand side were
-over-optimized and produced incorrect results.
-[L<GH #16685|https://github.com/Perl/perl5/issues/16685>],
-[L<GH #17816|https://github.com/Perl/perl5/issues/17816>]
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the perldelta of a previous release.
=back
-=head1 Known Problems
-
-None
-
-=head1 Errata From Previous Releases
-
-None
-
=head1 Obituary
-Kent Fredric (KENTNL) passed away in February 2021. A native of New Zealand
-and a self-described "huge geek," Kent was the author or maintainer of 178
-CPAN distributions, the Perl maintainer for the Gentoo Linux distribution and
-a contributor to the Perl core distribution. He is mourned by his family,
-friends and open source software communities worldwide.
+XXX If any significant core contributor or member of the CPAN community has
+died, add a short obituary here.
=head1 Acknowledgements
-Perl 5.34.0 represents approximately 11 months of development since Perl
-5.32.0 and contains approximately 280,000 lines of changes across 2,100
-files from 78 authors.
-
-Excluding auto-generated files, documentation and release tools, there were
-approximately 150,000 lines of changes to 1,300 .pm, .t, .c and .h files.
-
-Perl continues to flourish into its fourth decade thanks to a vibrant
-community of users and developers. The following people are known to have
-contributed the improvements that became Perl 5.34.0:
-
-Aaron Crane, Adam Hartley, Andy Dougherty, Ben Cornett, Branislav
-Zahradník, brian d foy, Chris 'BinGOs' Williams, Christian Walde
-(Mithaldu), Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan Book, Daniel
-Böhmer, Daniel Laügt, Dan Kogai, David Cantrell, David Mitchell, Dominic
-Hamon, E. Choroba, Ed J, Eric Herman, Eric Lindblad, Eugene Alvin Villar,
-Felipe Gasper, Giovanni Tataranni, Graham Knop, Graham Ollis, Hauke D,
-H.Merijn Brand, Hugo van der Sanden, Ichinose Shogo, Ivan Baidakou, Jae
-Bradley, James E Keenan, Jason McIntosh, jkahrman, John Karr, John Lightsey,
-Kang-min Liu, Karen Etheridge, Karl Williamson, Keith Thompson, Leon
-Timmermans, Marc Reisner, Marcus Holland-Moritz, Max Maischein, Michael G
-Schwern, Nicholas Clark, Nicolas R., Paul Evans, Petr Písař, raiph, Renee
-Baecker, Ricardo Signes, Richard Leach, Romano, Ryan Voots, Samanta Navarro,
-Samuel Thibault, Sawyer X, Scott Baker, Sergey Poznyakoff, Sevan Janiyan,
-Shirakata Kentaro, Shlomi Fish, Sisyphus, Sizhe Zhao, Steve Hay, TAKAI
-Kousuke, Thibault Duponchelle, Todd Rinaldo, Tomasz Konojacki, Tom Hukins,
-Tom Stellard, Tony Cook, vividsnow, Yves Orton, Zakariyya Mughal,
-Михаил Козачков.
-
-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.
+XXX Generate this with:
+
+ perl Porting/acknowledgements.pl v5.35.2..HEAD
=head1 Reporting Bugs
https://perl5.git.perl.org / perl5.git / blobdiff