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Steve Hay > perl-5.19.4 > perl5192delta


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Source   Latest Release: perl-5.19.11


perl5192delta - what is new for perl v5.19.2


This document describes differences between the 5.19.1 release and the 5.19.2 release.

If you are upgrading from an earlier release such as 5.19.0, first read perl5191delta, which describes differences between 5.19.0 and 5.19.1.

Core Enhancements ^

More consistent prototype parsing

Multiple semicolons in subroutine prototypes have long been tolerated and treated as a single semicolon. There was one case where this did not happen. A subroutine whose prototype begins with "*" or ";*" can affect whether a bareword is considered a method name or sub call. This now applies also to ";;;*".

Whitespace has long been allowed inside subroutine prototypes, so sub( $ $ ) is equivalent to sub($$), but until now it was stripped when the subroutine was parsed. Hence, whitespace was not allowed in prototypes set by Scalar::Util::set_prototype. Now it is permitted, and the parser no longer strips whitespace. This means prototype &mysub returns the original prototype, whitespace and all.

Performance Enhancements ^

Modules and Pragmata ^

Updated Modules and Pragmata

Documentation ^

Changes to Existing Documentation





Diagnostics ^

The following additions or changes have been made to diagnostic output, including warnings and fatal error messages. For the complete list of diagnostic messages, see perldiag.

New Diagnostics

New Warnings

Changes to Existing Diagnostics

Configuration and Compilation ^

Platform Support ^

Platform-Specific Notes


objformat was removed from version 0.4-RELEASE of MidnightBSD and had been deprecated on earlier versions. This caused the build environment to be erroneously configured for a.out rather than elf. This has been now been corrected.

Internal Changes ^

Selected Bug Fixes ^

Known Problems ^

Acknowledgements ^

Perl 5.19.2 represents approximately 4 weeks of development since Perl 5.19.1 and contains approximately 15,000 lines of changes across 400 files from 40 authors.

Perl continues to flourish into its third decade thanks to a vibrant community of users and developers. The following people are known to have contributed the improvements that became Perl 5.19.2:

Abhijit Menon-Sen, Alexandr Ciornii, Andy Dougherty, Aristotle Pagaltzis, Brian Fraser, Brian Gottreu, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, David Golden, David Mitchell, Ed Avis, Father Chrysostomos, Graham Knop, H.Merijn Brand, Hojung Youn, James E Keenan, Johan Vromans, Karl Williamson, Keedi Kim, Kent Fredric, Lukas Mai, Moritz Lenz, Nathan Trapuzzano, Neil Bowers, Nicholas Clark, Niels Thykier, Niko Tyni, Olivier Mengué, Peter Martini, Petr Písař, Reini Urban, Ricardo Signes, Ruslan Zakirov, Slaven Rezic, Steffen Müller, Tony Cook, Vladimir Timofeev, Yves Orton.

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 articles recently posted to the comp.lang.perl.misc newsgroup and 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 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 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 please send it to This points to a closed subscription unarchived mailing list, which includes all the core committers, who will be able to help assess the impact of issues, figure out a resolution, and help co-ordinate the release of patches to mitigate or fix the problem across all platforms on which Perl is supported. Please only use this address for security issues in the Perl core, not for modules independently distributed on CPAN.


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.

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