5 perl5230delta - what is new for perl v5.23.0
9 This document describes differences between the 5.22.0 release and the 5.23.0
12 =head1 Core Enhancements
14 =head2 Unicode 8.0 is now supported
16 For details on what is in this release, see
17 L<http://www.unicode.org/versions/Unicode8.0.0/>.
19 =head1 Incompatible Changes
21 =head2 The C</\C/> character class has been removed.
23 This regular expression character class was deprecated in v5.20.0 and has
24 produced a deprecation warning since v5.22.0. It is now a compile-time
25 error. If you need to examine the individual bytes that make up a
26 UTF8-encoded character, then use C<utf8::encode()> on the string (or a
29 =head2 C<chdir('')> no longer chdirs home
31 Using C<chdir('')> or C<chdir(undef)> to chdir home has been deprecated since
32 perl v5.8, and will now fail. Use C<chdir()> instead.
34 =head1 Modules and Pragmata
36 =head2 Updated Modules and Pragmata
42 The libnet distribution has been upgraded from version 3.05 to 3.06.
46 The Scalar-List-Utils distribution has been upgraded from version 1.41 to 1.42.
50 L<autodie> has been upgraded from version 2.26 to 2.27.
54 L<CPAN::Meta> has been upgraded from version 2.150001 to 2.150005.
58 L<CPAN::Meta::Requirements> has been upgraded from version 2.132 to 2.133.
62 L<CPAN::Meta::YAML> has been upgraded from version 0.012 to 0.016.
66 L<Encode> has been upgraded from version 2.72 to 2.73.
70 L<encoding> has been upgraded from version 2.14 to 2.15.
74 L<ExtUtils::CBuilder> has been upgraded from version 0.280221 to 0.280223.
78 L<feature> has been upgraded from version 1.40 to 1.41.
82 L<Getopt::Long> has been upgraded from version 2.45 to 2.46.
86 L<HTTP::Tiny> has been upgraded from version 0.054 to 0.056.
90 L<List::Util> has been upgraded from version 1.41 to 1.42_01.
94 L<Locale::Codes> has been upgraded from version 3.34 to 3.35.
98 L<Math::BigInt> has been upgraded from version 1.9997 to 1.999701.
100 Correct the behaviour of bdiv() and bmod() in list context. [perl #124300]
102 Correct C<< Math::BigInt->new() >> for non-integer input. [perl #124325]
104 Speed up Math::BigFloat -> blog(). [perl #124382]
106 Fix bug in Math::BigFloat's bceil() and bint() methods. [perl #124412]
110 L<Math::BigRat> has been upgraded from version 0.2608 to 0.260801.
112 Correct the behaviour of bdiv() and bmod() in list context. [perl #124303]
116 L<Module::CoreList> has been upgraded from version 5.20150520 to 5.20150620.
120 L<Module::Metadata> has been upgraded from version 1.000026 to 1.000027.
124 L<parent> has been upgraded from version 0.232 to 0.234.
128 L<Parse::CPAN::Meta> has been upgraded from version 1.4414 to 1.4417.
132 L<perl5db.pl> has been upgraded from version 1.49 to 1.49_01.
134 User actions are no longer evaluated after the script under the
135 debugger finishes. [perl #71678]
139 L<Pod::Simple> has been upgraded from version 3.29 to 3.30.
143 L<Pod::Usage> has been upgraded from version 1.64 to 1.67.
147 L<POSIX> has been upgraded from version 1.53 to 1.54.
149 The NaN payload API has been implemented (getpayload, setpayload,
150 setpayloadsig, issignaling).
154 L<Scalar::Util> has been upgraded from version 1.41 to 1.42_01.
158 L<Socket> has been upgraded from version 2.018 to 2.019.
162 L<threads> has been upgraded from version 2.01 to 2.02.
166 L<Time::Piece> has been upgraded from version 1.29 to 1.30.
170 L<UNIVERSAL> has been upgraded from version 1.12 to 1.13.
172 Don't import from L<UNIVERSAL> in its documentation, it no longer
173 exports anything. [perl #125410]
177 =head1 Platform Support
179 =head2 Platform-Specific Notes
189 Visual C++ 2013 builds will now execute on XP and higher. Previously they would
190 only execute on Vista and higher.
194 You can now build perl with GNU Make and GCC. [perl #123440]
198 C<truncate($filename, $size)> now works for files over 4GB in size.
205 =head1 Selected Bug Fixes
211 Duplicating a closed file handle for write no longer creates a
212 filename of the form F<GLOB(0xXXXXXXXX)>. [perl #125115]
216 Warning fatality is now ignored when rewinding the stack. This
217 prevents infinite recursion when the now fatal error also causes
218 rewinding of the stack. [perl #123398]
222 In perl v5.22.0, the logic changed when parsing a numeric parameter to the -C
223 option, such that the successfully parsed number was not saved as the option
224 value if it parsed to the end of the argument. [perl #125381]
228 The PadlistNAMES macro is an lvalue again.
232 Zero -DPERL_TRACE_OPS memory for sub-threads.
234 perl_clone_using() was missing Zero init of PL_op_exec_cnt[]. This
235 caused sub-threads in threaded -DPERL_TRACE_OPS builds to spew exceedingly
236 large op-counts at destruct. These counts would print %x as "ABABABAB",
237 clearly a mem-poison value.
241 =head1 Acknowledgements
243 Perl 5.23.0 represents approximately 3 weeks of development since Perl 5.22.0
244 and contains approximately 86,000 lines of changes across 480 files from 29
247 Excluding auto-generated files, documentation and release tools, there were
248 approximately 55,000 lines of changes to 270 .pm, .t, .c and .h files.
250 Perl continues to flourish into its third decade thanks to a vibrant community
251 of users and developers. The following people are known to have contributed the
252 improvements that became Perl 5.23.0:
254 Chase Whitener, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
255 Mannsåker, Daniel Dragan, David Golden, David Mitchell, Hugo van der Sanden,
256 Jan Dubois, Jarkko Hietaniemi, Jerry D. Hedden, Jim Cromie, Karen Etheridge,
257 Karl Williamson, kmx, Lukas Mai, Martijn Lievaart, Matthew Horsfall, Niko Tyni,
258 Peter John Acklam, Rafael Garcia-Suarez, Reini Urban, Ricardo Signes, Shlomi
259 Fish, Steve Hay, Thomas Sibley, Tony Cook, Unicode Consortium, Zefram.
261 The list above is almost certainly incomplete as it is automatically generated
262 from version control history. In particular, it does not include the names of
263 the (very much appreciated) contributors who reported issues to the Perl bug
266 Many of the changes included in this version originated in the CPAN modules
267 included in Perl's core. We're grateful to the entire CPAN community for
268 helping Perl to flourish.
270 For a more complete list of all of Perl's historical contributors, please see
271 the F<AUTHORS> file in the Perl source distribution.
273 =head1 Reporting Bugs
275 If you find what you think is a bug, you might check the articles recently
276 posted to the comp.lang.perl.misc newsgroup and the perl bug database at
277 https://rt.perl.org/ . There may also be information at
278 http://www.perl.org/ , the Perl Home Page.
280 If you believe you have an unreported bug, please run the L<perlbug> program
281 included with your release. Be sure to trim your bug down to a tiny but
282 sufficient test case. Your bug report, along with the output of C<perl -V>,
283 will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
285 If the bug you are reporting has security implications, which make it
286 inappropriate to send to a publicly archived mailing list, then please send it
287 to perl5-security-report@perl.org. This points to a closed subscription
288 unarchived mailing list, which includes all the core committers, who will be
289 able to help assess the impact of issues, figure out a resolution, and help
290 co-ordinate the release of patches to mitigate or fix the problem across all
291 platforms on which Perl is supported. Please only use this address for
292 security issues in the Perl core, not for modules independently distributed on
297 The F<Changes> file for an explanation of how to view exhaustive details on
300 The F<INSTALL> file for how to build Perl.
302 The F<README> file for general stuff.
304 The F<Artistic> and F<Copying> files for copyright information.