5 perl5295delta - what is new for perl v5.29.5
9 This document describes differences between the 5.29.4 release and the 5.29.5
12 If you are upgrading from an earlier release such as 5.29.3, first read
13 L<perl5294delta>, which describes differences between 5.29.3 and 5.29.4.
15 =head1 Core Enhancements
17 =head2 C<-Drv> now means something on C<-DDEBUGGING> builds
19 Now, adding the verbose flag (C<-Dv>) to the C<-Dr> flag turns on all
20 possible regular expression debugging.
22 =head1 Performance Enhancements
28 Regular expression pattern matching of things like C<qr/[^I<a>]/> is
29 significantly sped up, where I<a> is any ASCII character. Which classes
30 will get this speed up is complicated and depends on the underlying bit
31 patterns of those characters, so differs between ASCII and EBCDIC
32 platforms, but all case pairs, like C<qr/[Gg]/> are included, as is
37 =head1 Modules and Pragmata
39 =head2 Updated Modules and Pragmata
45 L<Data::Dumper> has been upgraded from version 2.172 to 2.173.
49 L<Errno> has been upgraded from version 1.29 to 1.30.
53 L<File::Spec> has been upgraded from version 3.75 to 3.76.
57 L<GDBM_File> has been upgraded from version 1.17 to 1.18.
61 L<Module::CoreList> has been upgraded from version 5.20181020 to 5.20181120.
65 L<NDBM_File> has been upgraded from version 1.14 to 1.15.
69 L<ODBM_File> has been upgraded from version 1.15 to 1.16.
73 L<re> has been upgraded from version 0.36 to 0.37.
77 L<SDBM_File> has been upgraded from version 1.14 to 1.15.
83 =head2 Changes to Existing Documentation
85 We have attempted to update the documentation to reflect the changes
86 listed in this document. If you find any we have missed, send email
87 to L<perlbug@perl.org|mailto:perlbug@perl.org>.
89 Additionally, the following selected changes have been made:
97 The entry for L<perlfunc/-X> has been clarified to indicate that symbolic
98 links are followed for most tests.
102 =head1 Configuration and Compilation
108 Normally the thread-safe functions are used only on threaded builds.
109 It is now possible to force their use on unthreaded builds on systems
110 that have them available, by including the
111 C<-Accflags='-DUSE_THREAD_SAFE_LOCALE'> option to F<Configure>.
117 Tests were added and changed to reflect the other additions and changes
120 =head1 Platform Support
122 =head2 Platform-Specific Notes
128 Perl's build and testing process on Mac OS X for C<-Duseshrplib>
129 builds is now compatible with Mac OS X System Integrity Protection
132 SIP prevents binaries in F</bin> (and a few other places) being passed
133 the C<DYLD_LIBRARY_PATH> environment variable. For our purposes this
134 prevents C<DYLD_LIBRARY_PATH> from being passed to the shell, which
135 prevents that variable being passed to the testing or build process,
136 so running C<perl> couldn't find F<libperl.dylib>.
138 To workaround that, the initial build of the F<perl> executable
139 expects to find F<libperl.dylib> in the build directory, and the
140 library path is then adjusted during installation to point to the
147 Some support for Minix3 has been re-added.
151 =head1 Selected Bug Fixes
157 L<SDBM_File> is now more robust with corrupt database files. The
158 improvements do not make SDBM files suitable as an interchange format.
163 C<binmode($fh);> or C<binmode($fh, ':raw');> now properly removes the
164 C<:utf8> flag from the default C<:crlf> I/O layer on Win32. [perl
169 The experimental reference aliasing feature was misinterpreting array and
170 hash slice assignment as being localised, e.g.
172 \(@a[3,5,7]) = \(....);
174 was being interpreted as:
176 local \(@a[3,5,7]) = \(....);
182 =head1 Acknowledgements
184 Perl 5.29.5 represents approximately 4 weeks of development since Perl
185 5.29.4 and contains approximately 4,000 lines of changes across 110 files
188 Excluding auto-generated files, documentation and release tools, there were
189 approximately 2,600 lines of changes to 51 .pm, .t, .c and .h files.
191 Perl continues to flourish into its fourth decade thanks to a vibrant
192 community of users and developers. The following people are known to have
193 contributed the improvements that became Perl 5.29.5:
195 Aaron Crane, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, Dan
196 Dedrick, David Cantrell, David Mitchell, Dominic Hargreaves, H.Merijn Brand,
197 James Clarke, James E Keenan, Karen Etheridge, Karl Williamson, Niko Tyni,
198 Pali, Phil Pearl (Lobbes), Sawyer X, Tomasz Konojacki, Tony Cook.
200 The list above is almost certainly incomplete as it is automatically
201 generated from version control history. In particular, it does not include
202 the names of the (very much appreciated) contributors who reported issues to
203 the Perl bug tracker.
205 Many of the changes included in this version originated in the CPAN modules
206 included in Perl's core. We're grateful to the entire CPAN community for
207 helping Perl to flourish.
209 For a more complete list of all of Perl's historical contributors, please
210 see the F<AUTHORS> file in the Perl source distribution.
212 =head1 Reporting Bugs
214 If you find what you think is a bug, you might check the perl bug database
215 at L<https://rt.perl.org/>. There may also be information at
216 L<http://www.perl.org/>, the Perl Home Page.
218 If you believe you have an unreported bug, please run the L<perlbug> program
219 included with your release. Be sure to trim your bug down to a tiny but
220 sufficient test case. Your bug report, along with the output of C<perl -V>,
221 will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
223 If the bug you are reporting has security implications which make it
224 inappropriate to send to a publicly archived mailing list, then see
225 L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
226 for details of how to report the issue.
230 If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
231 you can do so by running the C<perlthanks> program:
235 This will send an email to the Perl 5 Porters list with your show of thanks.
239 The F<Changes> file for an explanation of how to view exhaustive details on
242 The F<INSTALL> file for how to build Perl.
244 The F<README> file for general stuff.
246 The F<Artistic> and F<Copying> files for copyright information.