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1=encoding utf8
2
3=head1 NAME
4
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5[ this is a template for a new perldelta file. Any text flagged as XXX needs
6to be processed before release. ]
7
8perldelta - what is new for perl v5.19.12
e128ab2c 9
4eabcf70 10=head1 DESCRIPTION
6db9054f 11
7ef8b31d 12This document describes differences between the 5.19.11 release and the 5.19.12
e08634c5 13release.
6db9054f 14
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15If you are upgrading from an earlier release such as 5.19.10, first read
16L<perl51911delta>, which describes differences between 5.19.10 and 5.19.11.
22730142 17
7ef8b31d 18=head1 Notice
0d0bc230 19
7ef8b31d 20XXX Any important notices here
87776862 21
7ef8b31d 22=head1 Core Enhancements
769e4861 23
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24XXX New core language features go here. Summarize user-visible core language
25enhancements. Particularly prominent performance optimisations could go
26here, but most should go in the L</Performance Enhancements> section.
27
28[ List each enhancement as a =head2 entry ]
29
30=head1 Security
31
32XXX Any security-related notices go here. In particular, any security
33vulnerabilities closed should be noted here rather than in the
34L</Selected Bug Fixes> section.
35
36[ List each security issue as a =head2 entry ]
37
38=head1 Incompatible Changes
39
40XXX For a release on a stable branch, this section aspires to be:
41
42 There are no changes intentionally incompatible with 5.XXX.XXX
43 If any exist, they are bugs, and we request that you submit a
44 report. See L</Reporting Bugs> below.
45
46[ List each incompatible change as a =head2 entry ]
47
48=head1 Deprecations
769e4861 49
7ef8b31d 50XXX Any deprecated features, syntax, modules etc. should be listed here.
ca3178e0 51
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52=head2 Module removals
53
54XXX Remove this section if inapplicable.
55
56The following modules will be removed from the core distribution in a
57future release, and will at that time need to be installed from CPAN.
58Distributions on CPAN which require these modules will need to list them as
59prerequisites.
60
61The core versions of these modules will now issue C<"deprecated">-category
62warnings to alert you to this fact. To silence these deprecation warnings,
63install the modules in question from CPAN.
64
65Note that these are (with rare exceptions) fine modules that you are encouraged
66to continue to use. Their disinclusion from core primarily hinges on their
67necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
68not usually on concerns over their design.
69
70=over
71
72=item XXX
73
74XXX Note that deprecated modules should be listed here even if they are listed
75as an updated module in the L</Modules and Pragmata> section.
769e4861 76
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77=back
78
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79[ List each other deprecation as a =head2 entry ]
80
81=head1 Performance Enhancements
82
83XXX Changes which enhance performance without changing behaviour go here.
84There may well be none in a stable release.
85
86[ List each enhancement as a =item entry ]
b314f574 87
474475f6 88=over 4
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89
90=item *
91
7ef8b31d 92XXX
f6f3144e 93
7ef8b31d 94=back
f6f3144e 95
7ef8b31d 96=head1 Modules and Pragmata
f6f3144e 97
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98XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
99go here. If Module::CoreList is updated, generate an initial draft of the
100following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
101for important changes should then be added by hand. In an ideal world,
102dual-life modules would have a F<Changes> file that could be cribbed.
45a13884 103
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104[ Within each section, list entries as a =item entry ]
105
106=head2 New Modules and Pragmata
107
108=over 4
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109
110=item *
111
7ef8b31d 112XXX
f6f3144e 113
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114=back
115
116=head2 Updated Modules and Pragmata
117
118=over 4
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119
120=item *
121
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122L<Module::CoreList> has been upgraded from version 3.10 to 3.11.
123
124The list of Perl versions covered has been updated.
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125
126=back
fc671210 127
7ef8b31d 128=head2 Removed Modules and Pragmata
ec71b45f 129
7ef8b31d 130=over 4
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131
132=item *
133
7ef8b31d 134XXX
fc671210 135
7ef8b31d 136=back
fc671210 137
7ef8b31d 138=head1 Documentation
fc671210 139
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140XXX Changes to files in F<pod/> go here. Consider grouping entries by
141file and be sure to link to the appropriate page, e.g. L<perlfunc>.
33642846 142
7ef8b31d 143=head2 New Documentation
e486a115 144
7ef8b31d 145XXX Changes which create B<new> files in F<pod/> go here.
f6f3144e 146
7ef8b31d 147=head3 L<XXX>
ec71b45f 148
7ef8b31d 149XXX Description of the purpose of the new file here
ec71b45f 150
7ef8b31d 151=head2 Changes to Existing Documentation
ec71b45f 152
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153XXX Changes which significantly change existing files in F<pod/> go here.
154However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
155section.
f6f3144e 156
7ef8b31d 157=head3 L<XXX>
f6f3144e 158
7ef8b31d 159=over 4
7432779b 160
7ef8b31d 161=item *
7432779b 162
7ef8b31d 163XXX Description of the change here
7432779b 164
474475f6 165=back
e486a115 166
474475f6 167=head1 Diagnostics
d07feb8f 168
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169The following additions or changes have been made to diagnostic output,
170including warnings and fatal error messages. For the complete list of
171diagnostic messages, see L<perldiag>.
d07feb8f 172
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173XXX New or changed warnings emitted by the core's C<C> code go here. Also
174include any changes in L<perldiag> that reconcile it to the C<C> code.
175
176=head2 New Diagnostics
177
178XXX Newly added diagnostic messages go under here, separated into New Errors
179and New Warnings
180
181=head3 New Errors
182
183=over 4
184
185=item *
186
187XXX L<message|perldiag/"message">
188
189=back
190
191=head3 New Warnings
192
193=over 4
194
195=item *
196
197XXX L<message|perldiag/"message">
198
199=back
200
474475f6 201=head2 Changes to Existing Diagnostics
acc18285 202
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203XXX Changes (i.e. rewording) of diagnostic messages go here
204
474475f6 205=over 4
acc18285 206
b314f574 207=item *
acc18285 208
7ef8b31d 209XXX Describe change here
acc18285 210
474475f6 211=back
87776862 212
474475f6 213=head1 Utility Changes
87776862 214
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215XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
216Most of these are built within the directories F<utils> and F<x2p>.
217
218[ List utility changes as a =head2 entry for each utility and =item
219entries for each change
220Use L<XXX> with program names to get proper documentation linking. ]
221
222=head2 L<XXX>
769e4861 223
474475f6 224=over 4
769e4861 225
b314f574 226=item *
acc18285 227
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228XXX
229
230=back
231
232=head1 Configuration and Compilation
233
234XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
235go here. Any other changes to the Perl build process should be listed here.
236However, any platform-specific changes should be listed in the
237L</Platform Support> section, instead.
238
239[ List changes as a =item entry ].
240
241=over 4
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242
243=item *
244
7ef8b31d 245XXX
769e4861 246
474475f6 247=back
769e4861 248
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249=head1 Testing
250
251XXX Any significant changes to the testing of a freshly built perl should be
252listed here. Changes which create B<new> files in F<t/> go here as do any
253large changes to the testing harness (e.g. when parallel testing was added).
254Changes to existing files in F<t/> aren't worth summarizing, although the bugs
255that they represent may be covered elsewhere.
256
257[ List each test improvement as a =item entry ]
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258
259=over 4
260
261=item *
262
7ef8b31d 263XXX
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264
265=back
266
474475f6 267=head1 Platform Support
acc18285 268
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269XXX Any changes to platform support should be listed in the sections below.
270
271[ Within the sections, list each platform as a =item entry with specific
272changes as paragraphs below it. ]
273
274=head2 New Platforms
275
276XXX List any platforms that this version of perl compiles on, that previous
277versions did not. These will either be enabled by new files in the F<hints/>
278directories, or new subdirectories and F<README> files at the top level of the
279source tree.
87776862 280
10819dab 281=over 4
87776862 282
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283=item XXX-some-platform
284
285XXX
f6f3144e 286
ce5b6630 287=back
025c2e17 288
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289=head2 Discontinued Platforms
290
291XXX List any platforms that this version of perl no longer compiles on.
025c2e17 292
474475f6 293=over 4
6fa4f5e3 294
7ef8b31d 295=item XXX-some-platform
6fa4f5e3 296
7ef8b31d 297XXX
b3a2acfa 298
ce5b6630 299=back
025c2e17 300
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301=head2 Platform-Specific Notes
302
303XXX List any changes for specific platforms. This could include configuration
304and compilation changes or changes in portability/compatibility. However,
305changes within modules for platforms should generally be listed in the
306L</Modules and Pragmata> section.
6fa4f5e3 307
474475f6 308=over 4
6fa4f5e3 309
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310=item XXX-some-platform
311
312XXX
727d17a2 313
7ef8b31d 314=back
ea6b701a 315
7ef8b31d 316=head1 Internal Changes
b17e32ea 317
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318XXX Changes which affect the interface available to C<XS> code go here. Other
319significant internal changes for future core maintainers should be noted as
320well.
c378dac0 321
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322[ List each change as a =item entry ]
323
324=over 4
c378dac0 325
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326=item *
327
7ef8b31d 328XXX
5c45d39a 329
7ef8b31d 330=back
e1abb2bc 331
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332=head1 Selected Bug Fixes
333
334XXX Important bug fixes in the core language are summarized here. Bug fixes in
335files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
336
337[ List each fix as a =item entry ]
338
339=over 4
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340
341=item *
342
7ef8b31d 343XXX
e1abb2bc 344
03057ffb 345=back
346295c2 346
474475f6 347=head1 Known Problems
346295c2 348
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349XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
350tests that had to be C<TODO>ed for the release would be noted here. Unfixed
351platform specific bugs also go here.
352
353[ List each fix as a =item entry ]
354
474475f6 355=over 4
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356
357=item *
358
7ef8b31d 359XXX
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360
361=back
362
7ef8b31d 363=head1 Errata From Previous Releases
f1a26846 364
7ef8b31d 365=over 4
f1a26846 366
7ef8b31d 367=item *
52e02e68 368
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369XXX Add anything here that we forgot to add, or were mistaken about, in
370the perldelta of a previous release.
52e02e68 371
7ef8b31d 372=back
52e02e68 373
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374=head1 Obituary
375
376XXX If any significant core contributor has died, we've added a short obituary
377here.
378
379=head1 Acknowledgements
52e02e68 380
7ef8b31d 381XXX Generate this with:
52e02e68 382
7ef8b31d 383 perl Porting/acknowledgements.pl v5.19.11..HEAD
f5b73711 384
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385=head1 Reporting Bugs
386
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387If you find what you think is a bug, you might check the articles recently
388posted to the comp.lang.perl.misc newsgroup and the perl bug database at
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389https://rt.perl.org/ . There may also be information at
390http://www.perl.org/ , the Perl Home Page.
44691e6f 391
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392If you believe you have an unreported bug, please run the L<perlbug> program
393included with your release. Be sure to trim your bug down to a tiny but
394sufficient test case. Your bug report, along with the output of C<perl -V>,
395will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
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396
397If the bug you are reporting has security implications, which make it
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398inappropriate to send to a publicly archived mailing list, then please send it
399to perl5-security-report@perl.org. This points to a closed subscription
400unarchived mailing list, which includes all the core committers, who will be
401able to help assess the impact of issues, figure out a resolution, and help
f9001595 402co-ordinate the release of patches to mitigate or fix the problem across all
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403platforms on which Perl is supported. Please only use this address for
404security issues in the Perl core, not for modules independently distributed on
405CPAN.
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406
407=head1 SEE ALSO
408
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409The F<Changes> file for an explanation of how to view exhaustive details on
410what changed.
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411
412The F<INSTALL> file for how to build Perl.
413
414The F<README> file for general stuff.
415
416The F<Artistic> and F<Copying> files for copyright information.
417
418=cut