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perl-5.31.4
River stage five • 11292 direct dependents • 32664 total dependents
419 ++
/ perl5313delta

NAME

perl5313delta - what is new for perl v5.31.3

DESCRIPTION

This document describes differences between the 5.31.2 release and the 5.31.3 release.

If you are upgrading from an earlier release such as 5.31.1, first read perl5312delta, which describes differences between 5.31.1 and 5.31.2.

Incompatible Changes

Plain "0" string now treated as a number for range operator

Previously a range "0" .. "-1" would produce a range of numeric strings from "0" through "99", this now produces an empty list, just as 0 .. -1 does.

This was due to a special case that treated strings starting with "0" as strings so ranges like "00" .. "03" produced "00", "01", "02", "03" , but didn't specially handle the string "0".

[perl #133695]

\K now disallowed in look-ahead and look-behind assertions

This was disallowed because it causes unexpected behaviour, and no-one could define what the desired behaviour was.

[perl #124256]

Modules and Pragmata

Updated Modules and Pragmata

  • Compress::Raw::Bzip2 has been upgraded from version 2.086 to 2.087.

  • Compress::Raw::Zlib has been upgraded from version 2.086 to 2.087.

  • Devel::PPPort has been upgraded from version 3.54 to 3.55.

    The test files generated on Win32 are now identical to when they are generated on POSIX-like systems.

  • File::Find has been upgraded from version 1.36 to 1.37.

    On Win32, the tests no longer require either a file in the drive root directory, or a writable root directory.

  • Getopt::Long has been upgraded from version 2.50 to 2.51.

  • I18N::LangTags has been upgraded from version 1.07 to 1.08.

    Document the IGNORE_WIN32_LOCALE environment variable.

  • IO::Compress has been upgraded from version 2.086 to 2.087.

  • Module::CoreList has been upgraded from version 5.20190720 to 5.20190820.

  • PerlIO::via has been upgraded from version 0.17 to 0.18.

  • Storable has been upgraded from version 3.16 to 3.17.

  • Test::Simple has been upgraded from version 1.302164 to 1.302166.

  • Thread has been upgraded from version 3.04 to 3.05.

  • Time::HiRes has been upgraded from version 1.9761 to 1.9762.

    Removed obsolete code such as support for pre-5.6 perl and classic MacOS. [perl #134288]

  • Win32 has been upgraded from version 0.52 to 0.53.

  • XS::APItest has been upgraded from version 1.01 to 1.02.

Platform Support

Platform-Specific Notes

Windows

t/op/magic.t could fail if environment varables starting with FOO already existed.

Internal Changes

  • A new parser function parse_subsignature() allows a keyword plugin to parse a subroutine signature while use feature 'signatures' is in effect. This allows custom keywords to implement semantics similar to regular sub declarations that include signatures. [perl #132474]

  • Since on some platforms we need to hold a mutex when temporarily switching locales, new macros (STORE_LC_NUMERIC_SET_TO_NEEDED_IN, WITH_LC_NUMERIC_SET_TO_NEEDED and WITH_LC_NUMERIC_SET_TO_NEEDED_IN) have been added to make it easier to do this safely and efficiently as part of [perl #134172].

  • The memory bookkeeping overhead for allocating an OP structure has been reduced by 8 bytes per OP on 64-bit systems.

Selected Bug Fixes

  • $@ = 100; die; now correctly propagates the 100 as an exception instead of ignoring it. [perl #134291]

  • 0 0x@ no longer asserts in S_no_op(). [perl #134310]

  • Exceptions thrown while $@ is read-only could result in infinite recursion as perl tried to update $@, which throws another exception, resulting in a stack overflow. Perl now replaces $@ with a copy if it's not a simple writable SV. [perl #134266]

Acknowledgements

Perl 5.31.3 represents approximately 4 weeks of development since Perl 5.31.2 and contains approximately 9,900 lines of changes across 230 files from 23 authors.

Excluding auto-generated files, documentation and release tools, there were approximately 2,800 lines of changes to 160 .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 5.31.3:

Alexandr Savca, Andrew Fresh, Chad Granum, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Dan Book, David Cantrell, David Mitchell, E. Choroba, Graham Knop, Hauke D, H.Merijn Brand, Hugo van der Sanden, James E Keenan, Johan Vromans, Karen Etheridge, Karl Williamson, Paul Evans, Sawyer X, Steve Hay, Tomasz Konojacki, Tom Hukins, Tony Cook.

The list above is almost certainly incomplete as it is automatically generated from version control history. In particular, it does not include the names of the (very much appreciated) contributors who reported issues to the Perl bug tracker.

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 AUTHORS file in the Perl source distribution.

Reporting Bugs

If you find what you think is a bug, you might check the perl bug database at https://rt.perl.org/. There may also be information at http://www.perl.org/, the Perl Home Page.

If you believe you have an unreported bug, please run the 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 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 "SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to report the issue.

Give Thanks

If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so by running the perlthanks program:

    perlthanks

This will send an email to the Perl 5 Porters list with your show of thanks.

SEE ALSO

The Changes file for an explanation of how to view exhaustive details on what changed.

The INSTALL file for how to build Perl.

The README file for general stuff.

The Artistic and Copying files for copyright information.