perldelta - what is new for perl v5.12.2
This document describes differences between the 5.12.1 release and the 5.12.2 release.
If you are upgrading from an earlier major version, such as 5.10.1, first read perl5120delta, which describes differences between 5.10.1 and 5.12.0, as well as perl5121delta, which describes earlier changes in the 5.12 stable release series.
There are no changes intentionally incompatible with 5.12.1. If any exist, they are bugs and reports are welcome.
Other than the bug fixes listed below, there should be no user-visible changes to the core language in this release.
This release does not introduce any new modules or pragmata.
Upgraded from version 1.16 to 1.17.
Carp now detects incomplete caller EXPR
overrides and avoids using bogus
. To provide backtraces, Carp
relies on particular behaviour of the caller built-in. Carp now detects
if other code has overridden this with an incomplete implementation, and
modifies its backtrace accordingly. Previously incomplete overrides would
cause incorrect values in backtraces (best case), or obscure fatal errors
This fixes certain cases of
Bizarre copy of ARRAY
caused by modules
A patch to cpanp-run-perl has been backported from CPANPLUS
resolves [perl #55964]
and [perl #57106], both
of which related to failures to install distributions that use
A regression which caused a failure to find
to crash has been fixed. Now, it correctly falls back
to external globbing via
is now documented.
Upgraded from version 3.31 to 3.31_01.
Several portability fixes were made in
: a colon is now
recognized as a delimiter in native filespecs; caret-escaped delimiters are
recognized for better handling of extended filespecs;
an empty directory rather than the current directory if the input directory
name is empty;
properly handles Unix-style input.
perlbug now always gives the reporter a chance to change the email address it guesses for them.
perlbug should no longer warn about uninitialized values when using the
The existing policy on backward-compatibility and deprecation has been added to perlpolicy, along with definitions of terms like deprecation.
srand's usage has been clarified.
The entry for die was reorganized to emphasize its role in the exception mechanism.
Perl's INSTALL file has been clarified to explicitly state that Perl requires a C89 compliant ANSI C Compiler.
alarm()'s inability to interrupt blocking IO on Windows has been documented.
Math::TrulyRandom hasn't been updated since 1996 and has been removed as a recommended solution for random number generation.
perlrun has been updated to clarify the behaviour of octal flags to perl.
To ease user confusion,
, two special variables that were
removed in earlier versions of Perl have been documented.
The version of perlfaq shipped with the Perl core has been updated from the
official FAQ version, which is now maintained in the
branch of the Perl repository at git://perl5.git.perl.org/perl.git.
configuration probe on ARM has been fixed.
incompatible operand types
" error in ternary expressions when building
has been fixed.
Perl now skips setuid
tests on partitions it detects to be mounted
A possible segfault in the
default typemap has been fixed.
A possible memory leak when using caller EXPR to set
has been fixed.
Several memory leaks when loading XS modules were fixed.
unpack() now handles scalar context correctly for
fixing a potential crash.
split() would crash because the third item
on the stack wasn't the regular expression it expected.
would return both the unpacked result and the checksum on the stack,
Perl now avoids using memory after calling
when there are CODEREFs in
A bug that could cause "
" messages when
" is called from an XS destructor has been fixed.
The implementation of the
open $fh, '>' \$buffer
now supports get/set magic and thus tied buffers correctly.
opcodes now make room on the
stack for their return values in cases where no argument was passed in.
When matching unicode strings under some conditions inappropriate backtracking would
result in a
Malformed UTF-8 character (fatal) error. This should no longer occur.
See [perl #75680]
README.aix has been updated with information about the XL C/C++ V11 compiler suite.
When building Perl with the mingw64 x64 cross-compiler
in Config.pm and Config_heavy.pl were not previously not being set
correctly because, with that compiler, the include and lib directories
are not immediately below
git_version.h is now installed on VMS. This was an oversight in v5.12.0 which caused some extensions to fail to build.
Several memory leaks in stat FILEHANDLE have been fixed.
A memory leak in
due to a double allocation has been
A memory leak in
) has been fixed.
Perl 5.12.2 represents approximately three months of development since Perl 5.12.1 and contains approximately 2,000 lines of changes across 100 files from 36 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 5.12.2:
Abigail, Ævar Arnfjörð Bjarmason, Ben Morrow, brian d foy, Brian Phillips, Chas. Owens, Chris 'BinGOs' Williams, Chris Williams, Craig A. Berry, Curtis Jewell, Dan Dascalescu, David Golden, David Mitchell, Father Chrysostomos, Florian Ragwitz, George Greer, H.Merijn Brand, Jan Dubois, Jesse Vincent, Jim Cromie, Karl Williamson, Lars Dɪᴇᴄᴋᴏᴡ 迪拉斯, Leon Brocard, Maik Hentsche, Matt S Trout, Nicholas Clark, Rafael Garcia-Suarez, Rainer Tammer, Ricardo Signes, Salvador Ortiz Garcia, Sisyphus, Slaven Rezic, Steffen Mueller, Tony Cook, Vincent Pit and Yves Orton.
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 http://rt.perl.org/perlbug/ . 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
, will be sent off to email@example.com 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 firstname.lastname@example.org. This points to a closed subscription unarchived mailing list, which includes all the core committers, who 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.