perldelta - what is new for perl v5.27.11
This document describes differences between the 5.27.10 release and the 5.27.11 release.
If you are upgrading from an earlier release such as 5.27.9, first read perl52710delta, which describes differences between 5.27.9 and 5.27.10.
Compiling certain regular expression patterns with the case-insensitive modifier could cause a heap buffer overflow and crash perl. This has now been fixed. [perl #131582]
For certain types of syntax error in a regular expression pattern, the error message could either contain the contents of a random, possibly large, chunk of memory, or could crash perl. This has now been fixed. [perl #131598]
$ENV{$key}
A possible stack buffer overflow in the %ENV code on Windows has been fixed by removing the buffer completely since it was superfluous anyway. [perl #131665]
%ENV
The start up overhead for creating regular expression patterns with Unicode properties (\p{...}) has been greatly reduced in most cases.
\p{...}
bytes has been upgraded from version 1.05 to 1.06.
Carp has been upgraded from version 1.49 to 1.50.
Devel::PPPort has been upgraded from version 3.39 to 3.40.
Exporter has been upgraded from version 5.72 to 5.73.
ExtUtils::Constant has been upgraded from version 0.24 to 0.25.
I18N::Langinfo has been upgraded from version 0.16 to 0.17.
IO has been upgraded from version 1.38 to 1.39.
Module::CoreList has been upgraded from version 5.20180221 to 5.20180420.
POSIX has been upgraded from version 1.83 to 1.84.
subs has been upgraded from version 1.02 to 1.03.
Time::HiRes has been upgraded from version 1.9757 to 1.9759.
vars has been upgraded from version 1.03 to 1.04.
version has been upgraded from version 0.9918 to 0.9923.
XXX Changes to files in pod/ go here. Consider grouping entries by file and be sure to link to the appropriate page, e.g. perlfunc.
XXX Changes which create new files in pod/ go here.
XXX Description of the purpose of the new file here
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 perlbug@perl.org.
XXX Changes which significantly change existing files in pod/ go here. However, any changes to pod/perldiag.pod should go in the "Diagnostics" section.
Additionally, the following selected changes have been made:
XXX Description of the change here
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.
XXX New or changed warnings emitted by the core's C code go here. Also include any changes in perldiag that reconcile it to the C code.
C
XXX Newly added diagnostic messages go under here, separated into New Errors and New Warnings
XXX message
XXX Changes (i.e. rewording) of diagnostic messages go here
XXX Describe change here
Perl 5.27.11 represents approximately 4 weeks of development since Perl 5.27.10 and contains approximately 440,000 lines of changes across 200 files from 21 authors.
Excluding auto-generated files, documentation and release tools, there were approximately 440,000 lines of changes to 88 .pm, .t, .c and .h files.
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 5.27.11:
Aaron Crane, Alexandr Savca, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Daniel Dragan, David Mitchell, H.Merijn Brand, James E Keenan, John Peacock, Karl Williamson, Marc-Philip Werner, Nicholas Clark, Pali, Ricardo Signes, Sawyer X, Sergey Aleynikov, Steve Hay, Todd Rinaldo, Tony Cook, Yves Orton, Zefram.
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.
If you find what you think is a bug, you might check the perl bug database at https://rt.perl.org/ . There may also be information at http://www.perl.org/ , 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 perlbug@perl.org to be analysed by the Perl porting team.
perl -V
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.
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:
perlthanks
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.
To install less, copy and paste the appropriate command in to your terminal.
cpanm
cpanm less
CPAN shell
perl -MCPAN -e shell install less
For more information on module installation, please visit the detailed CPAN module installation guide.