You are viewing the version of this documentation from Perl 5.41.1. This is a development version of Perl.



perldelta - what is new for perl v5.41.1


This document describes differences between the 5.41.0 release and the 5.41.1 release.

If you are upgrading from an earlier release such as 5.40.0, first read perl5410delta, which describes differences between 5.40.0 and 5.41.0.

Core Enhancements

More CORE:: subs

chdir has been added as a subroutine to the CORE:: namespace.

Previously, code like &CORE::chdir($dir) or my $ref = \&CORE::chdir; $ref->($dir) would throw an error saying &CORE::chdir cannot be called directly. These cases are now fully supported.

Performance Enhancements

Modules and Pragmata

Updated Modules and Pragmata


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

Additionally, the following selected changes have been made:





Tests were added and changed to reflect the other additions and changes in this release. Furthermore, these significant changes were made:

Internal Changes

Selected Bug Fixes


Perl 5.41.1 represents approximately 3 weeks of development since Perl 5.41.0 and contains approximately 6,000 lines of changes across 270 files from 20 authors.

Excluding auto-generated files, documentation and release tools, there were approximately 3,900 lines of changes to 210 .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 5.41.1:

Chad Granum, Craig A. Berry, Dabrien 'Dabe' Murphy, Dan Book, David Mitchell, Elvin Aslanov, Graham Knop, James E Keenan, James Raspass, Johan Vromans, Karl Williamson, Leon Timmermans, Lukas Mai, Max Maischein, Paul Evans, Peter John Acklam, Philippe Bruhat (BooK), Richard Leach, TAKAI Kousuke, 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 There may also be information at, the Perl Home Page.

If you believe you have an unreported bug, please open an issue at 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.