NAME
perldelta - what is new for perl v5.23.3
DESCRIPTION
This document describes differences between the 5.23.2 release and the 5.23.3 release.
If you are upgrading from an earlier release such as 5.23.1, first read perl5232delta, which describes differences between 5.23.1 and 5.23.2.
Core Enhancements
qr/(?[ ])/ now works in UTF-8 locales
Extended Bracketed Character Classes now will successfully compile when use locale is in effect. The compiled pattern will use standard Unicode rules. If the runtime locale is not a UTF-8 one, a warning is raised and standard Unicode rules are used anyway. No tainting is done since the outcome does not actually depend on the locale.
Incompatible Changes
An off by one issue in $Carp::MaxArgNums has been fixed
$Carp::MaxArgNums is supposed to be the number of arguments to display. Prior to this version, it was instead showing $Carp::MaxArgNums + 1 arguments, contrary to the documentation.
Modules and Pragmata
Updated Modules and Pragmata
B has been upgraded from version 1.58 to 1.59.
bignum has been upgraded from version 0.39 to 0.40.
Carp has been upgraded from version 1.36 to 1.37.
Compress::Raw::Zlib has been upgraded from version 2.068 to 2.068_01.
DynaLoader has been upgraded from version 1.33 to 1.34.
Encode has been upgraded from version 2.76 to 2.77.
encoding has been upgraded from version 2.16 to 2.17.
English has been upgraded from version 1.09 to 1.10.
Errno has been upgraded from version 1.23 to 1.24.
experimental has been upgraded from version 0.013 to 0.014.
ExtUtils::MakeMaker has been upgraded from version 7.04_01 to 7.10.
ExtUtils::ParseXS has been upgraded from version 3.29 to 3.30.
ExtUtils::Typemaps has been upgraded from version 3.29 to 3.30.
File::Find has been upgraded from version 1.30 to 1.31.
File::Glob has been upgraded from version 1.24 to 1.25.
File::Spec has been upgraded from version 3.57 to 3.58.
Hash::Util::FieldHash has been upgraded from version 1.15 to 1.17.
if has been upgraded from version 0.0604 to 0.0605.
locale has been upgraded from version 1.06 to 1.07.
Locale::Codes has been upgraded from version 3.35 to 3.36.
Module::CoreList has been upgraded from version 5.20150820 to 5.20150920.
mro has been upgraded from version 1.17 to 1.18.
Pod::Perldoc has been upgraded from version 3.25 to 3.25_01.
POSIX has been upgraded from version 1.56 to 1.57.
Socket has been upgraded from version 2.020 to 2.020_01.
Test has been upgraded from version 1.26 to 1.27.
Thread::Queue has been upgraded from version 3.05 to 3.06.
threads has been upgraded from version 2.02 to 2.03.
Time::HiRes has been upgraded from version 1.9726 to 1.9727_02.
Unicode::UCD has been upgraded from version 0.62 to 0.63.
Win32 has been upgraded from version 0.51 to 0.52.
New Modules and Pragmata
Amiga::ARexx has been added, as version 0.02
Amiga::Exec has been added, as version 0.01
Documentation
Changes to Existing Documentation
perlcall
A number of cleanups have been made to perlcall, including:
use EXTEND(SP, n) and PUSHs() instead of XPUSHs() where applicable and update prose to match
add POPu, POPul and POPpbytex to the "complete list of POP macros" and clarify the documentation for some of the existing entries, and a note about side-effects
add API documentation for POPu and POPul
use ERRSV more efficiently
approaches to thread-safety storage of SVs.
perlunicode
Discourage use of 'In' prefix for Unicode Block property.
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 Errors
%s must not be a named sequence in transliteration operator
(F) Transliteration (
tr///andy///) transliterates individual characters. But a named sequence by definition is more than an individual charater, and hence doing this operation on it doesn't make sense.
Testing
Parallel building has been added to the dmake
makefile.mkmakefile. All Win32 compilers are supported.
Platform Support
Platform-Specific Notes
- EBCDIC
cmp()andsort()fixed for UTF-EBCDIC strings -
Comparing two strings that were both encoded in UTF-8 (or more precisely, UTF-EBCDIC) did not work properly until now. Since
sort()usescmp(), this fixes that as well. - EBCDIC
tr///andyr///fixed for\N{}, anduse utf8ranges -
Perl v5.22 introduced the concept of portable ranges to regular expression patterns. A portable range matches the same set of characters no matter what platform is being run on. This concept is now extended to
tr///. Seetr///.There were also some problems with these operations under
use utf8, which are now fixed - Win32
-
Parallel building has been added to the dmake
makefile.mkmakefile. All Win32 compilers are supported.
- AmigaOS
-
The AmigaOS port has been reintegrated into the main tree, based off of Perl 5.22.1.
- clang++
-
Don't add -shared when the compiler is clang++
Selected Bug Fixes
qr/(?[ () ])/no longer segfaults, giving a syntax error message instead. [perl #125805]Regular expression possessive quantifier v5.20 regression now fixed.
qr/PAT{min,max}+/is supposed to behave identically toqr/(?>PAT{min,max})/. Since v5.20, this didn't work if min and max were equal. [perl #125825]BEGIN <>no longer segfaults and properly produces an error message. [perl #125341]In
tr///an illegal backwards range liketr/\x{101}-\x{100}//was not always detected, giving incorrect results. This is now fixed.
Acknowledgements
Perl 5.23.3 represents approximately 4 weeks of development since Perl 5.23.2 and contains approximately 150,000 lines of changes across 550 files from 30 authors.
Excluding auto-generated files, documentation and release tools, there were approximately 120,000 lines of changes to 410 .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 5.23.3:
Aaron Crane, Alexander D'Archangel, Andy Broad, Chris 'BinGOs' Williams, Craig A. Berry, Dan Collins, Daniel Dragan, David Mitchell, Father Chrysostomos, James E Keenan, Jan Dubois, Jarkko Hietaniemi, Jerry D. Hedden, John SJ Anderson, Karen Etheridge, Karl Williamson, Lukas Mai, Matthew Horsfall, Nicolas R., Peter John Acklam, Peter Martini, Ricardo Signes, Shlomi Fish, Steffen Müller, Steve Hay, Sullivan Beck, Thomas Sibley, Todd Rinaldo, Tony Cook, Zachary Storer.
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 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.
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 perl5-security-report@perl.org. 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.
SEE ALSO
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.