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database/perl/lib/pods/perl5142delta.pod

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+=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