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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 v5.19.3
e128ab2c 9
4eabcf70 10=head1 DESCRIPTION
6db9054f 11
12dcbffb 12This document describes differences between the 5.19.2 release and the 5.19.3
e08634c5 13release.
6db9054f 14
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15If you are upgrading from an earlier release such as 5.19.1, first read
16L<perl5192delta>, which describes differences between 5.19.1 and 5.19.2.
42bff0d9 17
12dcbffb 18=head1 Notice
42bff0d9 19
12dcbffb 20XXX Any important notices here
42bff0d9 21
12dcbffb 22=head1 Core Enhancements
c0ca71c9 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.
c0ca71c9 27
12dcbffb 28[ List each enhancement as a =head2 entry ]
c0ca71c9 29
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30=head2 B<-F> now implies B<-a> and B<-a> implies B<-n>
31
32Previously B<-F> without B<-a> was a no-op, and B<-a> without B<-n> or
33B<-p> was a no-op, with this change, if you supply B<-F> then both
34B<-a> and B<-n> are implied and if you supply B<-a> then B<-n> is implied.
35
36You can still use B<-p> for its extra behaviour. [perl #116190]
37
12dcbffb 38=head1 Security
c0ca71c9 39
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40XXX Any security-related notices go here. In particular, any security
41vulnerabilities closed should be noted here rather than in the
42L</Selected Bug Fixes> section.
c0ca71c9 43
12dcbffb 44[ List each security issue as a =head2 entry ]
c0ca71c9 45
12dcbffb 46=head1 Incompatible Changes
c0ca71c9 47
12dcbffb 48XXX For a release on a stable branch, this section aspires to be:
c0ca71c9 49
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50 There are no changes intentionally incompatible with 5.XXX.XXX
51 If any exist, they are bugs, and we request that you submit a
52 report. See L</Reporting Bugs> below.
c0ca71c9 53
12dcbffb 54[ List each incompatible change as a =head2 entry ]
c0ca71c9 55
12dcbffb 56=head1 Deprecations
c0ca71c9 57
12dcbffb 58XXX Any deprecated features, syntax, modules etc. should be listed here.
c0ca71c9 59
12dcbffb 60=head2 Module removals
c0ca71c9 61
12dcbffb 62XXX Remove this section if inapplicable.
c0ca71c9 63
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64The following modules will be removed from the core distribution in a
65future release, and will at that time need to be installed from CPAN.
66Distributions on CPAN which require these modules will need to list them as
67prerequisites.
c0ca71c9 68
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69The core versions of these modules will now issue C<"deprecated">-category
70warnings to alert you to this fact. To silence these deprecation warnings,
71install the modules in question from CPAN.
c0ca71c9 72
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73Note that these are (with rare exceptions) fine modules that you are encouraged
74to continue to use. Their disinclusion from core primarily hinges on their
75necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
76not usually on concerns over their design.
c0ca71c9 77
12dcbffb 78=over
c0ca71c9 79
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80XXX Note that deprecated modules should be listed here even if they are listed
81as an updated module in the L</Modules and Pragmata> section.
c0ca71c9 82
12dcbffb 83=back
c0ca71c9 84
12dcbffb 85[ List each other deprecation as a =head2 entry ]
c0ca71c9 86
12dcbffb 87=head1 Performance Enhancements
c0ca71c9 88
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89XXX Changes which enhance performance without changing behaviour go here.
90There may well be none in a stable release.
c0ca71c9 91
12dcbffb 92[ List each enhancement as a =item entry ]
c0ca71c9 93
12dcbffb 94=over 4
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95
96=item *
97
12dcbffb 98XXX
c0ca71c9 99
12dcbffb 100=back
70ba8092 101
12dcbffb 102=head1 Modules and Pragmata
42bff0d9 103
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104XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
105go here. If Module::CoreList is updated, generate an initial draft of the
106following sections using F<Porting/corelist-perldelta.pl>, which prints stub
107entries to STDOUT. Results can be pasted in place of the '=head2' entries
108below. A paragraph summary for important changes should then be added by hand.
109In an ideal world, dual-life modules would have a F<Changes> file that could be
110cribbed.
6e4979f3 111
12dcbffb 112[ Within each section, list entries as a =item entry ]
6e4979f3 113
12dcbffb 114=head2 New Modules and Pragmata
6e4979f3 115
12dcbffb 116=over 4
42bff0d9 117
c0ca71c9 118=item *
42bff0d9 119
12dcbffb 120XXX
42bff0d9 121
12dcbffb 122=back
42bff0d9 123
12dcbffb 124=head2 Updated Modules and Pragmata
42bff0d9 125
12dcbffb 126=over 4
42bff0d9 127
c0ca71c9 128=item *
42bff0d9 129
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130L<Data::Dumper> has been upgraded from version 2.147 to 2.148.
131
132The compatbility of the XS implementation with the pure perl version
133under C<Useqq> has been improved. [perl #118933]
42bff0d9 134
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135=item *
136
137L<Storable> has been upgraded from version 2.45 to 2.46.
138
139Avoid creating temporary objects for STORABLE_attach when they aren't
140required. [perl #118907]
141
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142=item *
143
144L<bignum> has been upgraded from version 0.35 to 0.36.
145
146L<bigrat> wasn't correctly updating an internal variable when C<use>d
147with a C<lib> option.
148
c0ca71c9 149=back
42bff0d9 150
12dcbffb 151=head2 Removed Modules and Pragmata
dbd04185 152
38663f11 153=over 4
583aa5c2 154
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155=item *
156
12dcbffb 157XXX
42bff0d9 158
38663f11 159=back
42bff0d9 160
12dcbffb 161=head1 Documentation
989e4501 162
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163XXX Changes to files in F<pod/> go here. Consider grouping entries by
164file and be sure to link to the appropriate page, e.g. L<perlfunc>.
989e4501 165
12dcbffb 166=head2 New Documentation
989e4501 167
12dcbffb 168XXX Changes which create B<new> files in F<pod/> go here.
42bff0d9 169
12dcbffb 170=head3 L<XXX>
42bff0d9 171
12dcbffb 172XXX Description of the purpose of the new file here
42bff0d9 173
12dcbffb 174=head2 Changes to Existing Documentation
42bff0d9 175
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176XXX Changes which significantly change existing files in F<pod/> go here.
177However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
178section.
42bff0d9 179
3031ec7a 180=head3 L<perlopentut>
42bff0d9 181
38663f11 182=over 4
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183
184=item *
185
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186The C<open> tutorial has been completely rewriten by Tom Christiansen, and now
187focuses on covering only the basics, rather than providing a comprehensive
188reference to all things openable. This rewrite came as the result of a
189vigorous discussion on perl5-porters kicked off by a set of improvements
190written by Alexander Hartmaier to the existing C<perlopentut>. A "more than
191you ever wanted to know about C<open>" document may follow in subsequent
192versions of perl.
1fdd5e53 193
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194=back
195
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196=head1 Diagnostics
197
198The following additions or changes have been made to diagnostic output,
199including warnings and fatal error messages. For the complete list of
200diagnostic messages, see L<perldiag>.
201
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202XXX New or changed warnings emitted by the core's C<C> code go here. Also
203include any changes in L<perldiag> that reconcile it to the C<C> code.
204
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205=head2 New Diagnostics
206
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207XXX Newly added diagnostic messages go under here, separated into New Errors
208and New Warnings
209
210=head3 New Errors
583aa5c2 211
38663f11 212=over 4
583aa5c2 213
b8a02ff1 214=item *
583aa5c2 215
12dcbffb 216XXX L<message|perldiag/"message">
583aa5c2 217
b8a02ff1 218=back
583aa5c2 219
12dcbffb 220=head3 New Warnings
96d496e4 221
38663f11 222=over 4
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223
224=item *
225
12dcbffb 226XXX L<message|perldiag/"message">
96d496e4 227
12dcbffb 228=back
1310e590 229
12dcbffb 230=head2 Changes to Existing Diagnostics
e727f86a 231
12dcbffb 232XXX Changes (i.e. rewording) of diagnostic messages go here
e727f86a 233
12dcbffb 234=over 4
e727f86a 235
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236=item *
237
12dcbffb 238XXX Describe change here
81ca6d44 239
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240=back
241
12dcbffb 242=head1 Utility Changes
583aa5c2 243
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244XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
245Most of these are built within the directories F<utils> and F<x2p>.
71e6aba6 246
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247[ List utility changes as a =head3 entry for each utility and =item
248entries for each change
249Use L<XXX> with program names to get proper documentation linking. ]
d5f315e8 250
12dcbffb 251=head3 L<XXX>
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252
253=over 4
254
255=item *
256
12dcbffb 257XXX
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258
259=back
260
12dcbffb 261=head1 Configuration and Compilation
2426c394 262
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263XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
264go here. Any other changes to the Perl build process should be listed here.
265However, any platform-specific changes should be listed in the
266L</Platform Support> section, instead.
4724da03 267
12dcbffb 268[ List changes as a =item entry ].
583aa5c2 269
38663f11 270=over 4
a34da6c4 271
12dcbffb 272=item *
a34da6c4 273
12dcbffb 274XXX
a34da6c4 275
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276=back
277
12dcbffb 278=head1 Testing
583aa5c2 279
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280XXX Any significant changes to the testing of a freshly built perl should be
281listed here. Changes which create B<new> files in F<t/> go here as do any
282large changes to the testing harness (e.g. when parallel testing was added).
283Changes to existing files in F<t/> aren't worth summarizing, although the bugs
284that they represent may be covered elsewhere.
1de7c8e6 285
12dcbffb 286[ List each test improvement as a =item entry ]
9c800862 287
12dcbffb 288=over 4
aaf54772 289
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290=item *
291
12dcbffb 292XXX
b7bbd8b6 293
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294=back
295
12dcbffb 296=head1 Platform Support
d7bfa554 297
12dcbffb 298XXX Any changes to platform support should be listed in the sections below.
81d3ed5a 299
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300[ Within the sections, list each platform as a =item entry with specific
301changes as paragraphs below it. ]
81d3ed5a 302
12dcbffb 303=head2 New Platforms
0b023496 304
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305XXX List any platforms that this version of perl compiles on, that previous
306versions did not. These will either be enabled by new files in the F<hints/>
307directories, or new subdirectories and F<README> files at the top level of the
308source tree.
0b023496 309
12dcbffb 310=over 4
e11f653d 311
12dcbffb 312=item XXX-some-platform
5e0164b2 313
12dcbffb 314XXX
5e0164b2 315
12dcbffb 316=back
e11f653d 317
12dcbffb 318=head2 Discontinued Platforms
8be8cdec 319
12dcbffb 320XXX List any platforms that this version of perl no longer compiles on.
8be8cdec 321
12dcbffb 322=over 4
07a522a5 323
12dcbffb 324=item XXX-some-platform
07a522a5 325
12dcbffb 326XXX
71b4007c 327
12dcbffb 328=back
71b4007c 329
12dcbffb 330=head2 Platform-Specific Notes
f6b1d2f5 331
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332XXX List any changes for specific platforms. This could include configuration
333and compilation changes or changes in portability/compatibility. However,
334changes within modules for platforms should generally be listed in the
335L</Modules and Pragmata> section.
f6b1d2f5 336
12dcbffb 337=over 4
7e4f209b 338
12dcbffb 339=item XXX-some-platform
7e4f209b 340
12dcbffb 341XXX
558673e6 342
12dcbffb 343=back
558673e6 344
12dcbffb 345=head1 Internal Changes
47a7c93d 346
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347XXX Changes which affect the interface available to C<XS> code go here. Other
348significant internal changes for future core maintainers should be noted as
349well.
47a7c93d 350
12dcbffb 351[ List each change as a =item entry ]
b5a80c26 352
12dcbffb 353=over 4
b5a80c26 354
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355=item *
356
12dcbffb 357XXX
7f1d4316 358
12dcbffb 359=back
02bef66e 360
12dcbffb 361=head1 Selected Bug Fixes
d30fb844 362
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363XXX Important bug fixes in the core language are summarized here. Bug fixes in
364files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
d30fb844 365
12dcbffb 366[ List each fix as a =item entry ]
21c01741 367
12dcbffb 368=over 4
21c01741 369
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370=item *
371
12dcbffb 372XXX
467582e8 373
38663f11 374=back
d7bfa554 375
38663f11 376=head1 Known Problems
6810f0ad 377
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378XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
379tests that had to be C<TODO>ed for the release would be noted here. Unfixed
380platform specific bugs also go here.
381
382[ List each fix as a =item entry ]
383
38663f11 384=over 4
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385
386=item *
387
12dcbffb 388XXX
0e417e4d 389
38663f11 390=back
583aa5c2 391
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392=head1 Obituary
393
394XXX If any significant core contributor has died, we've added a short obituary
395here.
396
583aa5c2 397=head1 Acknowledgements
a75569c0 398
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399XXX Generate this with:
400
401 perl Porting/acknowledgements.pl v5.19.2..HEAD
f5b73711 402
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403=head1 Reporting Bugs
404
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405If you find what you think is a bug, you might check the articles recently
406posted to the comp.lang.perl.misc newsgroup and the perl bug database at
407http://rt.perl.org/perlbug/ . There may also be information at
408http://www.perl.org/ , the Perl Home Page.
44691e6f 409
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410If you believe you have an unreported bug, please run the L<perlbug> program
411included with your release. Be sure to trim your bug down to a tiny but
412sufficient test case. Your bug report, along with the output of C<perl -V>,
413will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
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414
415If the bug you are reporting has security implications, which make it
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416inappropriate to send to a publicly archived mailing list, then please send it
417to perl5-security-report@perl.org. This points to a closed subscription
418unarchived mailing list, which includes all the core committers, who will be
419able to help assess the impact of issues, figure out a resolution, and help
f9001595 420co-ordinate the release of patches to mitigate or fix the problem across all
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421platforms on which Perl is supported. Please only use this address for
422security issues in the Perl core, not for modules independently distributed on
423CPAN.
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424
425=head1 SEE ALSO
426
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427The F<Changes> file for an explanation of how to view exhaustive details on
428what changed.
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429
430The F<INSTALL> file for how to build Perl.
431
432The F<README> file for general stuff.
433
434The F<Artistic> and F<Copying> files for copyright information.
435
436=cut