PERL5142DELTA(1) Perl Programmers Reference Guide PERL5142DELTA(1)
perl5142delta - what is new for perl v5.14.2
This document describes differences between the 5.14.1 release and the 5.14.2 release.
If you are upgrading from an earlier release such as 5.14.0, first read perl5141delta, which describes differences between 5.14.0 and
No changes since 5.14.0.
"File::Glob::bsd_glob()" memory error with GLOB_ALTDIRFUNC (CVE-2011-2728).
Calling "File::Glob::bsd_glob" with the unsupported flag GLOB_ALTDIRFUNC would cause an access violation / segfault. A Perl program that
accepts a flags value from an external source could expose itself to denial of service or arbitrary code execution attacks. There are no
known exploits in the wild. The problem has been corrected by explicitly disabling all unsupported flags and setting unused function
pointers to null. Bug reported by Clement Lecigne.
"Encode" decode_xs n-byte heap-overflow (CVE-2011-2939)
A bug in "Encode" could, on certain inputs, cause the heap to overflow. This problem has been corrected. Bug reported by Robert Zacek.
There are no changes intentionally incompatible with 5.14.0. If any exist, they are bugs and reports are welcome.
There have been no deprecations since 5.14.0.
Modules and Pragmata
New Modules and Pragmata
Updated Modules and Pragmata
o CPAN has been upgraded from version 1.9600 to version 1.9600_01.
CPAN::Distribution has been upgraded from version 1.9602 to 1.9602_01.
Backported bugfixes from CPAN version 1.9800. Ensures proper detection of "configure_requires" prerequisites from CPAN Meta files in
the case where "dynamic_config" is true. [rt.cpan.org #68835]
Also ensures that "configure_requires" is only checked in META files, not MYMETA files, so protect against MYMETA generation that drops
o Encode has been upgraded from version 2.42 to 2.42_01.
o File::Glob has been upgraded from version 1.12 to version 1.13.
o PerlIO::scalar has been upgraded from version 0.11 to 0.11_01.
It fixes a problem with "open my $fh, ">", $scalar" not working if $scalar is a copy-on-write scalar.
Removed Modules and Pragmata
HP-UX PA-RISC/64 now supports gcc-4.x
A fix to correct the socketsize now makes the test suite pass on HP-UX PA-RISC for 64bitall builds.
Building on OS X 10.7 Lion and Xcode 4 works again
The build system has been updated to work with the build tools under Mac OS X 10.7.
o In @INC filters (subroutines returned by subroutines in @INC), $_ used to misbehave: If returned from a subroutine, it would not be
copied, but the variable itself would be returned; and freeing $_ (e.g., with "undef *_") would cause perl to crash. This has been
fixed [perl #91880].
o Perl 5.10.0 introduced some faulty logic that made "U*" in the middle of a pack template equivalent to "U0" if the input string was
empty. This has been fixed [perl #90160].
o "caller" no longer leaks memory when called from the DB package if @DB::args was assigned to after the first call to "caller". Carp
was triggering this bug [perl #97010].
o "utf8::decode" had a nasty bug that would modify copy-on-write scalars' string buffers in place (i.e., skipping the copy). This could
result in hashes having two elements with the same key [perl #91834].
o Localising a tied variable used to make it read-only if it contained a copy-on-write string.
o Elements of restricted hashes (see the fields pragma) containing copy-on-write values couldn't be deleted, nor could such hashes be
cleared ("%hash = ()").
o Locking a hash element that is a glob copy no longer causes subsequent assignment to it to corrupt the glob.
o A panic involving the combination of the regular expression modifiers "/aa" introduced in 5.14.0 and the "" escape sequence has been
fixed [perl #95964].
This is a list of some significant unfixed bugs, which are regressions from 5.12.0.
o "PERL_GLOBAL_STRUCT" is broken.
Since perl 5.14.0, building with "-DPERL_GLOBAL_STRUCT" hasn't been possible. This means that perl currently doesn't work on any
platforms that require it to be built this way, including Symbian.
While "PERL_GLOBAL_STRUCT" now works again on recent development versions of perl, it actually working on Symbian again hasn't been
We'd be very interested in hearing from anyone working with Perl on Symbian.
Perl 5.14.2 represents approximately three months of development since Perl 5.14.1 and contains approximately 1200 lines of changes across
61 files from 9 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 5.14.2:
Craig A. Berry, David Golden, Father Chrysostomos, Florian Ragwitz, H.Merijn Brand, Karl Williamson, Nicholas Clark, Pau Amma and Ricardo
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 output of "perl -V", 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.
perl v5.16.3 2013-03-04 PERL5142DELTA(1)