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Aaron Crane > perl-5.19.10 > perl5197delta


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Source   Latest Release: perl-5.19.11


perl5197delta - what is new for perl v5.19.7


This document describes differences between the 5.19.6 release and the 5.19.7 release.

If you are upgrading from an earlier release such as 5.19.5, first read perl5196delta, which describes differences between 5.19.5 and 5.19.6.

Core Enhancements ^

Postfix syntax for maximum array index

The postfix notation ->$#* has been added, to match the similar postfix operators added in 5.19.5. $foo->$#* is equivalent to $#$foo. See perlref.

Incompatible Changes ^

Data::Dumper's output may change

Depending on the data structures dumped and the settings set for Data::Dumper, the dumped output may have changed from previous versions.

If you have tests that depend on the exact output of Data::Dumper, they may fail.

To avoid this problem in your code, test against the data structure from evaluating the dumped structure, instead of the dump itself.

Deprecations ^

The module has been deprecated since version 3.64.

Modules and Pragmata ^

Updated Modules and Pragmata

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

Utility Changes ^


Testing ^

Platform Support ^

Platform-Specific Notes


Experimental support for building with Intel C++ Compiler has been extended to cover the dmake makefile (win32/ as well.

Internal Changes ^

Selected Bug Fixes ^

Acknowledgements ^

Perl 5.19.7 represents approximately 4 weeks of development since Perl 5.19.6 and contains approximately 90,000 lines of changes across 390 files from 26 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 5.19.7:

Abigail, Abir Viqar, Brian Childs, Brian Fraser, Chris 'BinGOs' Williams, Craig A. Berry, Dabrien 'Dabe' Murphy, Daniel Dragan, David Mitchell, Dennis Kaarsemaker, Evan Zacks, Father Chrysostomos, François Perrad, Graham Knop, James E Keenan, Jess Robinson, Karl Williamson, Kevin Ryde, Martin McGrath, Matthew Horsfall, Nicholas Clark, Peter Martini, Ricardo Signes, Steve Hay, Tony Cook, 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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