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Author image Sawyer X
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perldelta - what is new for perl v5.33.2


This document describes differences between the 5.33.1 release and the 5.33.2 release.

If you are upgrading from an earlier release such as 5.33.0, first read perl5331delta, which describes differences between 5.33.0 and 5.33.1.

Modules and Pragmata

Updated Modules and Pragmata

  • Archive::Tar has been upgraded from version 2.36 to 2.38.

  • Compress::Raw::Bzip2 has been upgraded from version 2.093 to 2.096.

  • Compress::Raw::Zlib has been upgraded from version 2.093 to 2.096.

  • DB_File has been upgraded from version 1.853 to 1.854.

  • Env has been upgraded from version 1.04 to 1.05.

  • Errno has been upgraded from version 1.31 to 1.32.

  • ExtUtils::Install has been upgraded from version 2.14 to 2.18.

  • Filter::Util::Call has been upgraded from version 1.59 to 1.60.

  • IO-Compress has been upgraded from version 2.093 to 2.096.

  • IO::Socket::IP has been upgraded from version 0.39 to 0.41.

  • IO::Zlib has been upgraded from version 1.10 to 1.11.

  • Module::CoreList has been upgraded from version 5.20200820 to 5.20200920.

  • Module::Load::Conditional has been upgraded from version 0.70 to 0.74.

  • Opcode has been upgraded from version 1.47 to 1.48.

  • overload has been upgraded from version 1.31 to 1.32.

  • PerlIO::scalar has been upgraded from version 0.30 to 0.31.

  • Safe has been upgraded from version 2.42 to 2.43.

  • Test::Simple has been upgraded from version 1.302175 to 1.302181.

Configuration and Compilation

  • -Dusedefaultstrict

    EXPERIMENTAL: Perl can now be built with strict on by default (using the configuration option -Dusedefaultstrict.

    These strict defaults do not apply when perl is run via -e or -E.

    This setting provides a diagnostic mechanism for perl developers for development and is intended for development purposes only and is thus turned on by default.


Perl 5.33.2 represents approximately 4 weeks of development since Perl 5.33.1 and contains approximately 18,000 lines of changes across 380 files from 19 authors.

Excluding auto-generated files, documentation and release tools, there were approximately 11,000 lines of changes to 260 .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 5.33.2:

Chris 'BinGOs' Williams, Christian Walde (Mithaldu), Craig A. Berry, Dagfinn Ilmari Mannsåker, David Mitchell, H.Merijn Brand, Hugo van der Sanden, James E Keenan, John Lightsey, Karen Etheridge, Karl Williamson, Nicholas Clark, Nicolas R., Ricardo Signes, Richard Leach, Sawyer X, Todd Rinaldo, Tom Hukins, Tony Cook.

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

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://github.com/Perl/perl5/issues. There may also be information at http://www.perl.org/, the Perl Home Page.

If you believe you have an unreported bug, please open an issue at https://github.com/Perl/perl5/issues. Be sure to trim your bug down to a tiny but sufficient test case.

If the bug you are reporting has security implications which make it inappropriate to send to a public issue tracker, 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:


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


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.