5 [ this is a template for a new perldelta file. Any text flagged as XXX needs
6 to be processed before release. ]
8 perldelta - what is new for perl v5.33.7
12 This document describes differences between the 5.33.6 release and the 5.33.7
15 If you are upgrading from an earlier release such as 5.33.5, first read
16 L<perl5336delta>, which describes differences between 5.33.5 and 5.33.6.
20 XXX Any important notices here
22 =head1 Core Enhancements
24 =head2 Experimental Try/Catch Syntax
26 An initial experimental attempt at providing C<try>/C<catch> notation has
35 warn "An error occurred: $e";
38 For more information, see L<perlsyn/"Try Catch Exception Handling">.
40 [ List each enhancement as a =head2 entry ]
44 XXX Any security-related notices go here. In particular, any security
45 vulnerabilities closed should be noted here rather than in the
46 L</Selected Bug Fixes> section.
48 [ List each security issue as a =head2 entry ]
50 =head1 Incompatible Changes
52 XXX For a release on a stable branch, this section aspires to be:
54 There are no changes intentionally incompatible with 5.XXX.XXX
55 If any exist, they are bugs, and we request that you submit a
56 report. See L</Reporting Bugs> below.
58 [ List each incompatible change as a =head2 entry ]
62 XXX Any deprecated features, syntax, modules etc. should be listed here.
64 =head2 Module removals
66 XXX Remove this section if not applicable.
68 The following modules will be removed from the core distribution in a
69 future release, and will at that time need to be installed from CPAN.
70 Distributions on CPAN which require these modules will need to list them as
73 The core versions of these modules will now issue C<"deprecated">-category
74 warnings to alert you to this fact. To silence these deprecation warnings,
75 install the modules in question from CPAN.
77 Note that these are (with rare exceptions) fine modules that you are encouraged
78 to continue to use. Their disinclusion from core primarily hinges on their
79 necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
80 not usually on concerns over their design.
86 XXX Note that deprecated modules should be listed here even if they are listed
87 as an updated module in the L</Modules and Pragmata> section.
91 [ List each other deprecation as a =head2 entry ]
93 =head1 Performance Enhancements
95 XXX Changes which enhance performance without changing behaviour go here.
96 There may well be none in a stable release.
98 [ List each enhancement as an =item entry ]
108 =head1 Modules and Pragmata
110 XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
111 go here. If Module::CoreList is updated, generate an initial draft of the
112 following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
113 for important changes should then be added by hand. In an ideal world,
114 dual-life modules would have a F<Changes> file that could be cribbed.
116 The list of new and updated modules is modified automatically as part of
117 preparing a Perl release, so the only reason to manually add entries here is if
118 you're summarising the important changes in the module update. (Also, if the
119 manually-added details don't match the automatically-generated ones, the
120 release manager will have to investigate the situation carefully.)
122 [ Within each section, list entries as an =item entry ]
124 =head2 New Modules and Pragmata
130 XXX Remove this section if not applicable.
134 =head2 Updated Modules and Pragmata
140 L<XXX> has been upgraded from version A.xx to B.yy.
142 If there was something important to note about this change, include that here.
146 =head2 Removed Modules and Pragmata
158 XXX Changes to files in F<pod/> go here. Consider grouping entries by
159 file and be sure to link to the appropriate page, e.g. L<perlfunc>.
161 =head2 New Documentation
163 XXX Changes which create B<new> files in F<pod/> go here.
167 XXX Description of the purpose of the new file here
169 =head2 Changes to Existing Documentation
171 We have attempted to update the documentation to reflect the changes
172 listed in this document. If you find any we have missed, open an issue
173 at L<https://github.com/Perl/perl5/issues>.
175 XXX Changes which significantly change existing files in F<pod/> go here.
176 However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
179 Additionally, the following selected changes have been made:
187 L<my()|perlfunc/my> and L<state()|perlfunc/state> now explicitly warn
188 the reader that lexical variables should typically not be redeclared
189 within the same scope or statement.
190 L<[#18389]|https://github.com/Perl/perl5/issues/18389>
200 XXX Description of the change here
206 The following additions or changes have been made to diagnostic output,
207 including warnings and fatal error messages. For the complete list of
208 diagnostic messages, see L<perldiag>.
210 XXX New or changed warnings emitted by the core's C<C> code go here. Also
211 include any changes in L<perldiag> that reconcile it to the C<C> code.
213 =head2 New Diagnostics
215 XXX Newly added diagnostic messages go under here, separated into New Errors
224 XXX L<message|perldiag/"message">
234 XXX L<message|perldiag/"message">
238 =head2 Changes to Existing Diagnostics
240 XXX Changes (i.e. rewording) of diagnostic messages go here
246 XXX Describe change here
250 =head1 Utility Changes
252 XXX Changes to installed programs such as F<perldoc> and F<xsubpp> go here.
253 Most of these are built within the directory F<utils>.
255 [ List utility changes as a =head2 entry for each utility and =item
256 entries for each change
257 Use L<XXX> with program names to get proper documentation linking. ]
269 =head1 Configuration and Compilation
271 XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
272 go here. Any other changes to the Perl build process should be listed here.
273 However, any platform-specific changes should be listed in the
274 L</Platform Support> section, instead.
276 [ List changes as an =item entry ].
288 XXX Any significant changes to the testing of a freshly built perl should be
289 listed here. Changes which create B<new> files in F<t/> go here as do any
290 large changes to the testing harness (e.g. when parallel testing was added).
291 Changes to existing files in F<t/> aren't worth summarizing, although the bugs
292 that they represent may be covered elsewhere.
294 XXX If there were no significant test changes, say this:
296 Tests were added and changed to reflect the other additions and changes
299 XXX If instead there were significant changes, say this:
301 Tests were added and changed to reflect the other additions and
302 changes in this release. Furthermore, these significant changes were
305 [ List each test improvement as an =item entry ]
315 =head1 Platform Support
317 XXX Any changes to platform support should be listed in the sections below.
319 [ Within the sections, list each platform as an =item entry with specific
320 changes as paragraphs below it. ]
324 XXX List any platforms that this version of perl compiles on, that previous
325 versions did not. These will either be enabled by new files in the F<hints/>
326 directories, or new subdirectories and F<README> files at the top level of the
331 =item XXX-some-platform
337 =head2 Discontinued Platforms
339 XXX List any platforms that this version of perl no longer compiles on.
343 =item XXX-some-platform
349 =head2 Platform-Specific Notes
351 XXX List any changes for specific platforms. This could include configuration
352 and compilation changes or changes in portability/compatibility. However,
353 changes within modules for platforms should generally be listed in the
354 L</Modules and Pragmata> section.
360 Building with mingw.org compilers (version 3.4.5 or later) using mingw runtime
361 versions < 3.22 now works again. This was broken in Perl 5.31.4.
363 Building with mingw.org compilers (version 3.4.5 or later) using mingw runtime
364 versions >= 3.21 now works (for compilers up to version 5.3.0).
366 Makefile.mk, and thus support for dmake, has been removed. It is still possible
367 to build Perl on Windows using nmake (Makefile) and GNU make (GNUmakefile).
368 [L<GH #18511|https://github.com/Perl/perl5/pull/18511>]
372 =head1 Internal Changes
374 XXX Changes which affect the interface available to C<XS> code go here. Other
375 significant internal changes for future core maintainers should be noted as
378 [ List each change as an =item entry ]
388 =head1 Selected Bug Fixes
390 XXX Important bug fixes in the core language are summarized here. Bug fixes in
391 files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
393 [ List each fix as an =item entry ]
403 =head1 Known Problems
405 XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
406 tests that had to be C<TODO>ed for the release would be noted here. Unfixed
407 platform specific bugs also go here.
409 [ List each fix as an =item entry ]
419 =head1 Errata From Previous Releases
425 XXX Add anything here that we forgot to add, or were mistaken about, in
426 the perldelta of a previous release.
432 XXX If any significant core contributor or member of the CPAN community has
433 died, add a short obituary here.
435 =head1 Acknowledgements
437 XXX Generate this with:
439 perl Porting/acknowledgements.pl v5.33.6..HEAD
441 =head1 Reporting Bugs
443 If you find what you think is a bug, you might check the perl bug database
444 at L<https://github.com/Perl/perl5/issues>. There may also be information at
445 L<http://www.perl.org/>, the Perl Home Page.
447 If you believe you have an unreported bug, please open an issue at
448 L<https://github.com/Perl/perl5/issues>. Be sure to trim your bug down to a
449 tiny but sufficient test case.
451 If the bug you are reporting has security implications which make it
452 inappropriate to send to a public issue tracker, then see
453 L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
454 for details of how to report the issue.
458 If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
459 you can do so by running the C<perlthanks> program:
463 This will send an email to the Perl 5 Porters list with your show of thanks.
467 The F<Changes> file for an explanation of how to view exhaustive details on
470 The F<INSTALL> file for how to build Perl.
472 The F<README> file for general stuff.
474 The F<Artistic> and F<Copying> files for copyright information.