1=encoding utf8 2 3=head1 NAME 4 5perl5142delta - what is new for perl v5.14.2 6 7=head1 DESCRIPTION 8 9This document describes differences between the 5.14.1 release and 10the 5.14.2 release. 11 12If you are upgrading from an earlier release such as 5.14.0, first read 13L<perl5141delta>, which describes differences between 5.14.0 and 145.14.1. 15 16=head1 Core Enhancements 17 18No changes since 5.14.0. 19 20=head1 Security 21 22=head2 C<File::Glob::bsd_glob()> memory error with GLOB_ALTDIRFUNC (CVE-2011-2728). 23 24Calling C<File::Glob::bsd_glob> with the unsupported flag GLOB_ALTDIRFUNC would 25cause an access violation / segfault. A Perl program that accepts a flags value from 26an external source could expose itself to denial of service or arbitrary code 27execution attacks. There are no known exploits in the wild. The problem has been 28corrected by explicitly disabling all unsupported flags and setting unused function 29pointers to null. Bug reported by Clément Lecigne. 30 31=head2 C<Encode> decode_xs n-byte heap-overflow (CVE-2011-2939) 32 33A bug in C<Encode> could, on certain inputs, cause the heap to overflow. 34This problem has been corrected. Bug reported by Robert Zacek. 35 36=head1 Incompatible Changes 37 38There are no changes intentionally incompatible with 5.14.0. If any 39exist, they are bugs and reports are welcome. 40 41=head1 Deprecations 42 43There have been no deprecations since 5.14.0. 44 45=head1 Modules and Pragmata 46 47=head2 New Modules and Pragmata 48 49None 50 51=head2 Updated Modules and Pragmata 52 53=over 4 54 55=item * 56 57L<CPAN> has been upgraded from version 1.9600 to version 1.9600_01. 58 59L<CPAN::Distribution> has been upgraded from version 1.9602 to 1.9602_01. 60 61Backported bugfixes from CPAN version 1.9800. Ensures proper 62detection of C<configure_requires> prerequisites from CPAN Meta files 63in the case where C<dynamic_config> is true. [rt.cpan.org #68835] 64 65Also ensures that C<configure_requires> is only checked in META files, 66not MYMETA files, so protect against MYMETA generation that drops 67C<configure_requires>. 68 69=item * 70 71L<Encode> has been upgraded from version 2.42 to 2.42_01. 72 73See L</Security>. 74 75=item * 76 77L<File::Glob> has been upgraded from version 1.12 to version 1.13. 78 79See L</Security>. 80 81=item * 82 83L<PerlIO::scalar> has been upgraded from version 0.11 to 0.11_01. 84 85It fixes a problem with C<< open my $fh, ">", \$scalar >> not working if 86C<$scalar> is a copy-on-write scalar. 87 88=back 89 90=head2 Removed Modules and Pragmata 91 92None 93 94=head1 Platform Support 95 96=head2 New Platforms 97 98None 99 100=head2 Discontinued Platforms 101 102None 103 104=head2 Platform-Specific Notes 105 106=over 4 107 108=item HP-UX PA-RISC/64 now supports gcc-4.x 109 110A fix to correct the socketsize now makes the test suite pass on HP-UX 111PA-RISC for 64bitall builds. 112 113=item Building on OS X 10.7 Lion and Xcode 4 works again 114 115The build system has been updated to work with the build tools under Mac OS X 11610.7. 117 118=back 119 120=head1 Bug Fixes 121 122=over 4 123 124=item * 125 126In @INC filters (subroutines returned by subroutines in @INC), $_ used to 127misbehave: If returned from a subroutine, it would not be copied, but the 128variable itself would be returned; and freeing $_ (e.g., with C<undef *_>) 129would cause perl to crash. This has been fixed [perl #91880]. 130 131=item * 132 133Perl 5.10.0 introduced some faulty logic that made "U*" in the middle of 134a pack template equivalent to "U0" if the input string was empty. This has 135been fixed [perl #90160]. 136 137=item * 138 139C<caller> no longer leaks memory when called from the DB package if 140C<@DB::args> was assigned to after the first call to C<caller>. L<Carp> 141was triggering this bug [perl #97010]. 142 143=item * 144 145C<utf8::decode> had a nasty bug that would modify copy-on-write scalars' 146string buffers in place (i.e., skipping the copy). This could result in 147hashes having two elements with the same key [perl #91834]. 148 149=item * 150 151Localising a tied variable used to make it read-only if it contained a 152copy-on-write string. 153 154=item * 155 156Elements of restricted hashes (see the L<fields> pragma) containing 157copy-on-write values couldn't be deleted, nor could such hashes be cleared 158(C<%hash = ()>). 159 160=item * 161 162Locking a hash element that is a glob copy no longer causes subsequent 163assignment to it to corrupt the glob. 164 165=item * 166 167A panic involving the combination of the regular expression modifiers 168C</aa> introduced in 5.14.0 and the C<\b> escape sequence has been 169fixed [perl #95964]. 170 171=back 172 173=head1 Known Problems 174 175This is a list of some significant unfixed bugs, which are regressions 176from 5.12.0. 177 178=over 4 179 180=item * 181 182C<PERL_GLOBAL_STRUCT> is broken. 183 184Since perl 5.14.0, building with C<-DPERL_GLOBAL_STRUCT> hasn't been 185possible. This means that perl currently doesn't work on any platforms that 186require it to be built this way, including Symbian. 187 188While C<PERL_GLOBAL_STRUCT> now works again on recent development versions of 189perl, it actually working on Symbian again hasn't been verified. 190 191We'd be very interested in hearing from anyone working with Perl on Symbian. 192 193=back 194 195=head1 Acknowledgements 196 197Perl 5.14.2 represents approximately three months of development since 198Perl 5.14.1 and contains approximately 1200 lines of changes 199across 61 files from 9 authors. 200 201Perl continues to flourish into its third decade thanks to a vibrant 202community of users and developers. The following people are known to 203have contributed the improvements that became Perl 5.14.2: 204 205Craig A. Berry, David Golden, Father Chrysostomos, Florian Ragwitz, H.Merijn 206Brand, Karl Williamson, Nicholas Clark, Pau Amma and Ricardo Signes. 207 208=head1 Reporting Bugs 209 210If you find what you think is a bug, you might check the articles 211recently posted to the comp.lang.perl.misc newsgroup and the perl 212bug database at http://rt.perl.org/perlbug/ . There may also be 213information at http://www.perl.org/ , the Perl Home Page. 214 215If you believe you have an unreported bug, please run the L<perlbug> 216program included with your release. Be sure to trim your bug down 217to a tiny but sufficient test case. Your bug report, along with the 218output of C<perl -V>, will be sent off to perlbug@perl.org to be 219analysed by the Perl porting team. 220 221If the bug you are reporting has security implications, which make it 222inappropriate to send to a publicly archived mailing list, then please send 223it to perl5-security-report@perl.org. This points to a closed subscription 224unarchived mailing list, which includes all the core committers, who be able 225to help assess the impact of issues, figure out a resolution, and help 226co-ordinate the release of patches to mitigate or fix the problem across all 227platforms on which Perl is supported. Please only use this address for 228security issues in the Perl core, not for modules independently 229distributed on CPAN. 230 231=head1 SEE ALSO 232 233The F<Changes> file for an explanation of how to view exhaustive details 234on what changed. 235 236The F<INSTALL> file for how to build Perl. 237 238The F<README> file for general stuff. 239 240The F<Artistic> and F<Copying> files for copyright information. 241 242=cut 243