You are viewing the version of this documentation from Perl 5.35.7. This is a development release of Perl.



perldelta - what is new for perl v5.35.7


This document describes differences between the 5.35.6 release and the 5.35.7 release.

If you are upgrading from an earlier release such as 5.35.5, first read perl5356delta, which describes differences between 5.35.5 and 5.35.6.

Core Enhancements

builtin Functions

A new core module builtin has been added, which provides documentation for new always-present functions that are built into the interpreter.

say "Reference type of arrays is ", builtin::reftype([]);

It also provides a lexical import mechanism for providing short name versions of these functions.

use builtin 'reftype';
say "Reference type of arrays is ", reftype([]);

An initial set of functions exists to provide convenient access to stable boolean values, weakening references, and inspecting properties of references.

This builtin function mechanism and the functions it provides are all currently experimental.

For more information, see the builtin module.

Modules and Pragmata

Updated Modules and Pragmata

Platform Support

Platform-Specific Notes


This update enables us to build EBCDIC static/dynamic and 31-bit/64-bit addressing mode Perl. The number of tests that pass is consistent with the baseline before these updates.

These changes also provide the base support to be able to provide ASCII static/dynamic and 31-bit/64-bit addressing mode Perl.

Internal Changes

Selected Bug Fixes


Perl 5.35.7 represents approximately 4 weeks of development since Perl 5.35.6 and contains approximately 21,000 lines of changes across 230 files from 18 authors.

Excluding auto-generated files, documentation and release tools, there were approximately 19,000 lines of changes to 170 .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 5.35.7:

Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Felipe Gasper, Graham Knop, Jakub Wilk, James E Keenan, James Raspass, Karl Williamson, Michiel Beijen, Mike Fulton, Neil Bowers, Nicholas Clark, Paul Evans, Richard Leach, Steve Hay, TAKAI Kousuke, Tomasz Konojacki, 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.