| =encoding utf8 |
| |
| =head1 NAME |
| |
| perl5142delta - what is new for perl v5.14.2 |
| |
| =head1 DESCRIPTION |
| |
| 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 |
| L<perl5141delta>, which describes differences between 5.14.0 and |
| 5.14.1. |
| |
| =head1 Core Enhancements |
| |
| No changes since 5.14.0. |
| |
| =head1 Security |
| |
| =head2 C<File::Glob::bsd_glob()> memory error with GLOB_ALTDIRFUNC (CVE-2011-2728). |
| |
| Calling C<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 Clément Lecigne. |
| |
| =head2 C<Encode> decode_xs n-byte heap-overflow (CVE-2011-2939) |
| |
| A bug in C<Encode> could, on certain inputs, cause the heap to overflow. |
| This problem has been corrected. Bug reported by Robert Zacek. |
| |
| =head1 Incompatible Changes |
| |
| There are no changes intentionally incompatible with 5.14.0. If any |
| exist, they are bugs and reports are welcome. |
| |
| =head1 Deprecations |
| |
| There have been no deprecations since 5.14.0. |
| |
| =head1 Modules and Pragmata |
| |
| =head2 New Modules and Pragmata |
| |
| None |
| |
| =head2 Updated Modules and Pragmata |
| |
| =over 4 |
| |
| =item * |
| |
| L<CPAN> has been upgraded from version 1.9600 to version 1.9600_01. |
| |
| L<CPAN::Distribution> has been upgraded from version 1.9602 to 1.9602_01. |
| |
| Backported bugfixes from CPAN version 1.9800. Ensures proper |
| detection of C<configure_requires> prerequisites from CPAN Meta files |
| in the case where C<dynamic_config> is true. [rt.cpan.org #68835] |
| |
| Also ensures that C<configure_requires> is only checked in META files, |
| not MYMETA files, so protect against MYMETA generation that drops |
| C<configure_requires>. |
| |
| =item * |
| |
| L<Encode> has been upgraded from version 2.42 to 2.42_01. |
| |
| See L</Security>. |
| |
| =item * |
| |
| L<File::Glob> has been upgraded from version 1.12 to version 1.13. |
| |
| See L</Security>. |
| |
| =item * |
| |
| L<PerlIO::scalar> has been upgraded from version 0.11 to 0.11_01. |
| |
| It fixes a problem with C<< open my $fh, ">", \$scalar >> not working if |
| C<$scalar> is a copy-on-write scalar. |
| |
| =back |
| |
| =head2 Removed Modules and Pragmata |
| |
| None |
| |
| =head1 Platform Support |
| |
| =head2 New Platforms |
| |
| None |
| |
| =head2 Discontinued Platforms |
| |
| None |
| |
| =head2 Platform-Specific Notes |
| |
| =over 4 |
| |
| =item 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. |
| |
| =item 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. |
| |
| =back |
| |
| =head1 Bug Fixes |
| |
| =over 4 |
| |
| =item * |
| |
| 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 C<undef *_>) |
| would cause perl to crash. This has been fixed [perl #91880]. |
| |
| =item * |
| |
| 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]. |
| |
| =item * |
| |
| C<caller> no longer leaks memory when called from the DB package if |
| C<@DB::args> was assigned to after the first call to C<caller>. L<Carp> |
| was triggering this bug [perl #97010]. |
| |
| =item * |
| |
| C<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]. |
| |
| =item * |
| |
| Localising a tied variable used to make it read-only if it contained a |
| copy-on-write string. |
| |
| =item * |
| |
| Elements of restricted hashes (see the L<fields> pragma) containing |
| copy-on-write values couldn't be deleted, nor could such hashes be cleared |
| (C<%hash = ()>). |
| |
| =item * |
| |
| Locking a hash element that is a glob copy no longer causes subsequent |
| assignment to it to corrupt the glob. |
| |
| =item * |
| |
| A panic involving the combination of the regular expression modifiers |
| C</aa> introduced in 5.14.0 and the C<\b> escape sequence has been |
| fixed [perl #95964]. |
| |
| =back |
| |
| =head1 Known Problems |
| |
| This is a list of some significant unfixed bugs, which are regressions |
| from 5.12.0. |
| |
| =over 4 |
| |
| =item * |
| |
| C<PERL_GLOBAL_STRUCT> is broken. |
| |
| Since perl 5.14.0, building with C<-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 C<PERL_GLOBAL_STRUCT> now works again on recent development versions of |
| perl, it actually working on Symbian again hasn't been verified. |
| |
| We'd be very interested in hearing from anyone working with Perl on Symbian. |
| |
| =back |
| |
| =head1 Acknowledgements |
| |
| 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 Signes. |
| |
| =head1 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 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 L<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 C<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 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. |
| |
| =head1 SEE ALSO |
| |
| The F<Changes> file for an explanation of how to view exhaustive details |
| on what changed. |
| |
| The F<INSTALL> file for how to build Perl. |
| |
| The F<README> file for general stuff. |
| |
| The F<Artistic> and F<Copying> files for copyright information. |
| |
| =cut |