perl5265cdelta - what is new for cperl v5.26.5


This document describes differences between the cperl 5.26.5 and the cperl 5.26.4 release.

If you are upgrading from an earlier release such as v5.26.1c, first read perl5262cdelta, which describes differences between v5.26.1c and v5.26.2c.

Modules and Pragmata

Updated Modules and Pragmata

Cpanel::JSON::XS 4.09

Add seperate allow_dupkeys property, in relaxed (#122). Fixed allow_dupkeys for the XS slow path. Silence 2 -Wunused-value warnings. Fix ->unblessed_bool to produce modifiable perl structures (PR #121 by Pali).

Add unblessed_bool property (PR #118 by Pali).

Silence Gconvert -Wunused-result. gcvt returns a string, sprintf int, so suppress the retval.

ExtUtils::MakeMaker 8.35_08

Added -flto support for static libs (need the lto plugin) and D for deterministic builds, using arflags for AR_STATIC_ARGS, not just 'cr'.

Fixed FULLPERL patch for cperl on Win32.

Storable 1.12_04

Fix stacklimit security issues introduced in the p5p release [cperl #393]. User limits must not be higher than the probed hard limits, when overridden by user code or data, via hooks or even pst data.


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, send email to

Additionally, the following selected changes have been made:


Selected Bug Fixes


cperl 5.26.5 represents approximately 5 months of development since cperl 5.26.4c and contains approximately 2,700 lines of changes across 63 files from 2 authors.

Excluding auto-generated files, documentation and release tools, there were approximately 390 lines of changes to 17 .pm, .t, .c and .h files.

The following people are known to have contributed the improvements that became cperl 5.26.5:

Reini Urban, Yves Orton.

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

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.

Generated with:

    cperl Porting/ cperl-5.26.4..HEAD -c

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 run the cperlbug 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 to be analysed by the Perl porting team.

If you think it's a cperl specific bug or trust the cperl developers more please file an issue at

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.


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.