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44691e6f AB |
1 | =encoding utf8 |
2 | ||
3 | =head1 NAME | |
4 | ||
1e189079 EH |
5 | [ this is a template for a new perldelta file. Any text flagged as XXX needs |
6 | to be processed before release. ] | |
7 | ||
8 | perldelta - what is new for perl v5.27.2 | |
89853d76 | 9 | |
b5cbfe35 | 10 | =head1 DESCRIPTION |
89853d76 | 11 | |
1e189079 | 12 | This document describes differences between the 5.27.1 release and the 5.27.2 |
b5cbfe35 | 13 | release. |
89853d76 | 14 | |
1e189079 EH |
15 | If you are upgrading from an earlier release such as 5.27.0, first read |
16 | L<perl5271delta>, which describes differences between 5.27.0 and 5.27.1. | |
fbdbf2a7 | 17 | |
1e189079 | 18 | =head1 Notice |
fbdbf2a7 | 19 | |
1e189079 | 20 | XXX Any important notices here |
fbdbf2a7 | 21 | |
1e189079 | 22 | =head1 Core Enhancements |
fbdbf2a7 | 23 | |
1e189079 EH |
24 | XXX New core language features go here. Summarize user-visible core language |
25 | enhancements. Particularly prominent performance optimisations could go | |
26 | here, but most should go in the L</Performance Enhancements> section. | |
fbdbf2a7 | 27 | |
1e189079 | 28 | [ List each enhancement as a =head2 entry ] |
fbdbf2a7 | 29 | |
a8b85d6c KW |
30 | =head2 Unicode 10.0 is supported |
31 | ||
32 | A list of changes is at | |
33 | L<http://www.unicode.org/versions/Unicode10.0.0>. | |
34 | ||
1e189079 | 35 | =head1 Security |
fbdbf2a7 | 36 | |
1e189079 EH |
37 | XXX Any security-related notices go here. In particular, any security |
38 | vulnerabilities closed should be noted here rather than in the | |
39 | L</Selected Bug Fixes> section. | |
fbdbf2a7 | 40 | |
1e189079 | 41 | [ List each security issue as a =head2 entry ] |
1b510166 S |
42 | |
43 | =head1 Incompatible Changes | |
44 | ||
1e189079 | 45 | XXX For a release on a stable branch, this section aspires to be: |
85cd139f | 46 | |
1e189079 EH |
47 | There are no changes intentionally incompatible with 5.XXX.XXX |
48 | If any exist, they are bugs, and we request that you submit a | |
49 | report. See L</Reporting Bugs> below. | |
be332ba0 | 50 | |
1e189079 | 51 | [ List each incompatible change as a =head2 entry ] |
be332ba0 | 52 | |
1e189079 | 53 | =head1 Deprecations |
489c16bf | 54 | |
1e189079 | 55 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
489c16bf | 56 | |
1e189079 | 57 | =head2 Module removals |
c6e25b09 | 58 | |
1e189079 | 59 | XXX Remove this section if inapplicable. |
c6e25b09 | 60 | |
1e189079 EH |
61 | The following modules will be removed from the core distribution in a |
62 | future release, and will at that time need to be installed from CPAN. | |
63 | Distributions on CPAN which require these modules will need to list them as | |
64 | prerequisites. | |
520b6fb6 | 65 | |
1e189079 EH |
66 | The core versions of these modules will now issue C<"deprecated">-category |
67 | warnings to alert you to this fact. To silence these deprecation warnings, | |
68 | install the modules in question from CPAN. | |
520b6fb6 | 69 | |
1e189079 EH |
70 | Note that these are (with rare exceptions) fine modules that you are encouraged |
71 | to continue to use. Their disinclusion from core primarily hinges on their | |
72 | necessity to bootstrapping a fully functional, CPAN-capable Perl installation, | |
73 | not usually on concerns over their design. | |
02729eab | 74 | |
1e189079 | 75 | =over |
02729eab | 76 | |
1e189079 | 77 | =item XXX |
d0d6d4ce | 78 | |
1e189079 EH |
79 | XXX Note that deprecated modules should be listed here even if they are listed |
80 | as an updated module in the L</Modules and Pragmata> section. | |
d0d6d4ce | 81 | |
1e189079 | 82 | =back |
64278e8c | 83 | |
1e189079 | 84 | [ List each other deprecation as a =head2 entry ] |
64278e8c | 85 | |
1e189079 | 86 | =head1 Performance Enhancements |
5d09ee1c | 87 | |
1e189079 EH |
88 | XXX Changes which enhance performance without changing behaviour go here. |
89 | There may well be none in a stable release. | |
5d09ee1c | 90 | |
1e189079 | 91 | [ List each enhancement as a =item entry ] |
fd503f5c | 92 | |
1e189079 | 93 | =over 4 |
fd503f5c | 94 | |
1e189079 | 95 | =item * |
c8787424 | 96 | |
1e189079 | 97 | XXX |
c8787424 | 98 | |
1e189079 | 99 | =back |
9a4e033c | 100 | |
1e189079 | 101 | =head1 Modules and Pragmata |
9a4e033c | 102 | |
1e189079 EH |
103 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
104 | go here. If Module::CoreList is updated, generate an initial draft of the | |
105 | following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary | |
106 | for important changes should then be added by hand. In an ideal world, | |
107 | dual-life modules would have a F<Changes> file that could be cribbed. | |
1b510166 | 108 | |
1e189079 | 109 | [ Within each section, list entries as a =item entry ] |
315f3fc1 | 110 | |
1e189079 | 111 | =head2 New Modules and Pragmata |
315f3fc1 | 112 | |
1e189079 | 113 | =over 4 |
53fdf12a | 114 | |
1e189079 | 115 | =item * |
53fdf12a | 116 | |
1e189079 | 117 | XXX |
53fdf12a | 118 | |
1e189079 | 119 | =back |
53fdf12a | 120 | |
1e189079 | 121 | =head2 Updated Modules and Pragmata |
1b510166 | 122 | |
1b510166 S |
123 | =over 4 |
124 | ||
125 | =item * | |
126 | ||
ba2fe89f | 127 | L<arybase> has been upgraded from version 0.12 to 0.13. |
9a4e033c | 128 | |
516aa7ad JK |
129 | =item * |
130 | ||
ba0219e6 Z |
131 | L<Carp> has been upgraded from version 1.42 to 1.43. |
132 | ||
133 | =item * | |
134 | ||
ba2fe89f AC |
135 | L<Encode> has been upgraded from version 2.88 to 2.92. |
136 | ||
137 | =item * | |
138 | ||
139 | L<encoding> has been upgraded from version 2.19 to 2.20. | |
d912eab8 Z |
140 | |
141 | =item * | |
142 | ||
6baee08a | 143 | L<ExtUtils::CBuilder> has been upgraded from version 0.280225 to 0.280228. |
516aa7ad | 144 | |
af94b3ac Z |
145 | =item * |
146 | ||
ba2fe89f | 147 | L<feature> has been upgraded from version 1.48 to 1.49. |
af94b3ac | 148 | |
ba2fe89f | 149 | =item * |
16beba24 | 150 | |
ba2fe89f | 151 | L<File::Glob> has been upgraded from version 1.28 to 1.29. |
a049258c | 152 | |
ba2fe89f AC |
153 | =item * |
154 | ||
155 | L<File::Spec> and L<Cwd> have been upgraded from version 3.67 to 3.68. | |
fbe3f407 | 156 | |
759020c9 | 157 | =item * |
7ca0bfc4 | 158 | |
ba2fe89f AC |
159 | L<List::Util> has been upgraded from version 1.46_02 to 1.48. |
160 | ||
161 | =item * | |
162 | ||
163 | L<Math::BigRat> has been upgraded from version 0.2611 to 0.2613. | |
164 | ||
165 | =item * | |
166 | ||
167 | L<Module::CoreList> has been upgraded from version 5.20170621 to 5.20170720. | |
168 | ||
169 | =item * | |
170 | ||
171 | L<Opcode> has been upgraded from version 1.39 to 1.40. | |
172 | ||
173 | =item * | |
174 | ||
175 | L<PerlIO::scalar> has been upgraded from version 0.27 to 0.29. | |
176 | ||
177 | =item * | |
178 | ||
179 | L<POSIX> has been upgraded from version 1.76 to 1.77. | |
180 | ||
181 | =item * | |
182 | ||
183 | L<re> has been upgraded from version 0.34 to 0.35. | |
184 | ||
185 | =item * | |
186 | ||
187 | L<Scalar::Util> has been upgraded from version 1.46_02 to 1.48. | |
188 | ||
189 | =item * | |
190 | ||
191 | L<Time::HiRes> has been upgraded from version 1.9741 to 1.9743. | |
192 | ||
193 | =item * | |
194 | ||
195 | L<Time::Piece> has been upgraded from version 1.31 to 1.3201. | |
1b510166 | 196 | |
1e189079 | 197 | =back |
9a4e033c | 198 | |
1e189079 | 199 | =head1 Documentation |
9a4e033c | 200 | |
1e189079 EH |
201 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
202 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
9a4e033c | 203 | |
1e189079 | 204 | =head2 New Documentation |
1b510166 | 205 | |
1e189079 | 206 | XXX Changes which create B<new> files in F<pod/> go here. |
1b510166 | 207 | |
1e189079 | 208 | =head3 L<XXX> |
1b510166 | 209 | |
1e189079 | 210 | XXX Description of the purpose of the new file here |
1b510166 | 211 | |
1e189079 | 212 | =head2 Changes to Existing Documentation |
1b510166 | 213 | |
1e189079 EH |
214 | We have attempted to update the documentation to reflect the changes |
215 | listed in this document. If you find any we have missed, send email | |
216 | to L<perlbug@perl.org|mailto:perlbug@perl.org>. | |
1b510166 | 217 | |
1e189079 EH |
218 | XXX Changes which significantly change existing files in F<pod/> go here. |
219 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
220 | section. | |
f717dc4d | 221 | |
1e189079 | 222 | Additionally, the following selected changes have been made: |
1b510166 | 223 | |
1e189079 | 224 | =head3 L<XXX> |
1b510166 | 225 | |
1e189079 | 226 | =over 4 |
a049258c | 227 | |
2c8edc25 | 228 | =item * |
d5c7a4fc | 229 | |
1e189079 | 230 | XXX Description of the change here |
a049258c | 231 | |
1e189079 | 232 | =back |
3abe9611 | 233 | |
1e189079 | 234 | =head1 Diagnostics |
1b510166 | 235 | |
1e189079 EH |
236 | The following additions or changes have been made to diagnostic output, |
237 | including warnings and fatal error messages. For the complete list of | |
238 | diagnostic messages, see L<perldiag>. | |
1b510166 | 239 | |
1e189079 EH |
240 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
241 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
1b510166 | 242 | |
1e189079 | 243 | =head2 New Diagnostics |
1b510166 | 244 | |
1e189079 EH |
245 | XXX Newly added diagnostic messages go under here, separated into New Errors |
246 | and New Warnings | |
1b510166 | 247 | |
1e189079 | 248 | =head3 New Errors |
1b510166 | 249 | |
1e189079 | 250 | =over 4 |
1b510166 S |
251 | |
252 | =item * | |
253 | ||
1e189079 | 254 | XXX L<message|perldiag/"message"> |
1b510166 | 255 | |
1e189079 | 256 | =back |
1b510166 | 257 | |
1e189079 EH |
258 | =head3 New Warnings |
259 | ||
260 | =over 4 | |
1b510166 S |
261 | |
262 | =item * | |
263 | ||
1e189079 | 264 | XXX L<message|perldiag/"message"> |
1b510166 | 265 | |
1e189079 | 266 | =back |
1b510166 | 267 | |
1e189079 | 268 | =head2 Changes to Existing Diagnostics |
1b510166 | 269 | |
1e189079 | 270 | XXX Changes (i.e. rewording) of diagnostic messages go here |
1b510166 | 271 | |
1e189079 | 272 | =over 4 |
1b510166 S |
273 | |
274 | =item * | |
275 | ||
1e189079 | 276 | XXX Describe change here |
1b510166 | 277 | |
1e189079 | 278 | =back |
0cc8c746 | 279 | |
1e189079 | 280 | =head1 Utility Changes |
0cc8c746 | 281 | |
1e189079 EH |
282 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
283 | Most of these are built within the directory F<utils>. | |
0cc8c746 | 284 | |
1e189079 EH |
285 | [ List utility changes as a =head2 entry for each utility and =item |
286 | entries for each change | |
287 | Use L<XXX> with program names to get proper documentation linking. ] | |
0cc8c746 | 288 | |
1e189079 | 289 | =head2 L<XXX> |
0cc8c746 | 290 | |
1e189079 | 291 | =over 4 |
1b510166 S |
292 | |
293 | =item * | |
294 | ||
1e189079 | 295 | XXX |
1b510166 | 296 | |
1e189079 | 297 | =back |
1b510166 | 298 | |
1e189079 | 299 | =head1 Configuration and Compilation |
1b510166 | 300 | |
1e189079 EH |
301 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
302 | go here. Any other changes to the Perl build process should be listed here. | |
303 | However, any platform-specific changes should be listed in the | |
304 | L</Platform Support> section, instead. | |
305 | ||
306 | [ List changes as a =item entry ]. | |
1b510166 | 307 | |
1e189079 | 308 | =over 4 |
1b510166 S |
309 | |
310 | =item * | |
311 | ||
1e189079 | 312 | XXX |
1b510166 S |
313 | |
314 | =back | |
315 | ||
316 | =head1 Testing | |
317 | ||
1e189079 EH |
318 | XXX Any significant changes to the testing of a freshly built perl should be |
319 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
320 | large changes to the testing harness (e.g. when parallel testing was added). | |
321 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
322 | that they represent may be covered elsewhere. | |
323 | ||
324 | XXX If there were no significant test changes, say this: | |
325 | ||
326 | Tests were added and changed to reflect the other additions and changes | |
327 | in this release. | |
328 | ||
329 | XXX If instead there were significant changes, say this: | |
330 | ||
f717dc4d KW |
331 | Tests were added and changed to reflect the other additions and |
332 | changes in this release. Furthermore, these significant changes were | |
333 | made: | |
1b510166 | 334 | |
1e189079 | 335 | [ List each test improvement as a =item entry ] |
1b510166 | 336 | |
1e189079 | 337 | =over 4 |
1b510166 | 338 | |
10b7d799 TC |
339 | =item * |
340 | ||
1e189079 | 341 | XXX |
10b7d799 | 342 | |
1b510166 S |
343 | =back |
344 | ||
345 | =head1 Platform Support | |
346 | ||
1e189079 | 347 | XXX Any changes to platform support should be listed in the sections below. |
1b510166 | 348 | |
1e189079 EH |
349 | [ Within the sections, list each platform as a =item entry with specific |
350 | changes as paragraphs below it. ] | |
351 | ||
352 | =head2 New Platforms | |
1b510166 | 353 | |
1e189079 EH |
354 | XXX List any platforms that this version of perl compiles on, that previous |
355 | versions did not. These will either be enabled by new files in the F<hints/> | |
356 | directories, or new subdirectories and F<README> files at the top level of the | |
357 | source tree. | |
1b510166 | 358 | |
d8efeb46 SH |
359 | =over 4 |
360 | ||
1e189079 | 361 | =item XXX-some-platform |
d8efeb46 | 362 | |
1e189079 | 363 | XXX |
d8efeb46 SH |
364 | |
365 | =back | |
1b510166 | 366 | |
1e189079 EH |
367 | =head2 Discontinued Platforms |
368 | ||
369 | XXX List any platforms that this version of perl no longer compiles on. | |
370 | ||
371 | =over 4 | |
372 | ||
373 | =item XXX-some-platform | |
374 | ||
375 | XXX | |
376 | ||
1b510166 S |
377 | =back |
378 | ||
1e189079 EH |
379 | =head2 Platform-Specific Notes |
380 | ||
381 | XXX List any changes for specific platforms. This could include configuration | |
382 | and compilation changes or changes in portability/compatibility. However, | |
383 | changes within modules for platforms should generally be listed in the | |
384 | L</Modules and Pragmata> section. | |
1b510166 | 385 | |
1b510166 S |
386 | =over 4 |
387 | ||
1e189079 | 388 | =item XXX-some-platform |
1b510166 | 389 | |
1e189079 | 390 | XXX |
1b510166 | 391 | |
1e189079 EH |
392 | =back |
393 | ||
394 | =head1 Internal Changes | |
395 | ||
396 | XXX Changes which affect the interface available to C<XS> code go here. Other | |
397 | significant internal changes for future core maintainers should be noted as | |
398 | well. | |
f566c7cf | 399 | |
1e189079 EH |
400 | [ List each change as a =item entry ] |
401 | ||
402 | =over 4 | |
f566c7cf | 403 | |
0cbf5865 KW |
404 | =item * |
405 | ||
1e189079 | 406 | XXX |
0cbf5865 | 407 | |
1b510166 S |
408 | =back |
409 | ||
410 | =head1 Selected Bug Fixes | |
411 | ||
1e189079 EH |
412 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
413 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
414 | ||
415 | [ List each fix as a =item entry ] | |
416 | ||
1b510166 S |
417 | =over 4 |
418 | ||
419 | =item * | |
420 | ||
43901c14 TC |
421 | List assignment (C<aassign>) could in some rare cases allocate an |
422 | entry on the mortal stack and leave the entry uninitialized. [perl | |
423 | #131570] | |
1b510166 | 424 | |
3072e759 TC |
425 | =item * |
426 | ||
427 | Attempting to apply an attribute to an C<our> variable where a | |
428 | function of that name already exists could result in a NULL pointer | |
429 | being supplied where an SV was expected, crashing perl. [perl | |
430 | #131597] | |
431 | ||
20ae58f7 AC |
432 | =item * |
433 | ||
434 | C<split ' '> now correctly handles the argument being split when in the | |
435 | scope of the L<< C<unicode_strings>|feature/"The 'unicode_strings' feature" | |
436 | >> feature. Previously, when a string using the single-byte internal | |
437 | representation contained characters that are whitespace by Unicode rules but | |
438 | not by ASCII rules, it treated those characters as part of fields rather | |
439 | than as field separators. [perl #130907] | |
440 | ||
ab9a6a63 AC |
441 | =item * |
442 | ||
443 | Several built-in functions previously had bugs that could cause them to | |
444 | write to the internal stack without allocating room for the item being | |
445 | written. In rare situations, this could have led to a crash. These bugs have | |
446 | now been fixed, and if any similar bugs are introduced in future, they will | |
447 | be detected automatically in debugging builds. | |
448 | ||
449 | =item * | |
450 | ||
451 | Using a symbolic ref with postderef syntax as the key in a hash lookup was | |
452 | yielding an assertion failure on debugging builds. [perl #131627] | |
453 | ||
454 | =item * | |
455 | ||
456 | Array and hash variables whose names begin with a caret now admit indexing | |
457 | inside their curlies when interpolated into strings, as in C<< | |
458 | "${^CAPTURE[0]}" >> to index C<@{^CAPTURE}>. [perl #131664] | |
459 | ||
1e189079 | 460 | =back |
9a4e033c | 461 | |
1e189079 | 462 | =head1 Known Problems |
9a4e033c | 463 | |
1e189079 EH |
464 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
465 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
466 | platform specific bugs also go here. | |
9a4e033c | 467 | |
1e189079 | 468 | [ List each fix as a =item entry ] |
9a4e033c | 469 | |
1e189079 EH |
470 | =over 4 |
471 | ||
472 | =item * | |
473 | ||
474 | XXX | |
9a4e033c | 475 | |
1b510166 S |
476 | =back |
477 | ||
1e189079 | 478 | =head1 Errata From Previous Releases |
1b510166 | 479 | |
1e189079 EH |
480 | =over 4 |
481 | ||
482 | =item * | |
1b510166 | 483 | |
1e189079 EH |
484 | XXX Add anything here that we forgot to add, or were mistaken about, in |
485 | the perldelta of a previous release. | |
1b510166 | 486 | |
1e189079 EH |
487 | =back |
488 | ||
489 | =head1 Obituary | |
1b510166 | 490 | |
1e189079 EH |
491 | XXX If any significant core contributor has died, we've added a short obituary |
492 | here. | |
1b510166 | 493 | |
1e189079 | 494 | =head1 Acknowledgements |
0cc8c746 | 495 | |
1e189079 | 496 | XXX Generate this with: |
2e0dcc12 | 497 | |
1e189079 | 498 | perl Porting/acknowledgements.pl v5.25.5..HEAD |
f5b73711 | 499 | |
44691e6f AB |
500 | =head1 Reporting Bugs |
501 | ||
b5cbfe35 S |
502 | If you find what you think is a bug, you might check the perl bug database |
503 | at L<https://rt.perl.org/> . There may also be information at | |
504 | L<http://www.perl.org/> , the Perl Home Page. | |
44691e6f | 505 | |
e08634c5 SH |
506 | If you believe you have an unreported bug, please run the L<perlbug> program |
507 | included with your release. Be sure to trim your bug down to a tiny but | |
508 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
b5cbfe35 | 509 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. |
44691e6f | 510 | |
87c118b9 DM |
511 | If the bug you are reporting has security implications which make it |
512 | inappropriate to send to a publicly archived mailing list, then see | |
c0ea3294 SH |
513 | L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION> |
514 | for details of how to report the issue. | |
44691e6f | 515 | |
390ae6f9 S |
516 | =head1 Give Thanks |
517 | ||
518 | If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, | |
519 | you can do so by running the C<perlthanks> program: | |
520 | ||
521 | perlthanks | |
522 | ||
523 | This will send an email to the Perl 5 Porters list with your show of thanks. | |
524 | ||
44691e6f AB |
525 | =head1 SEE ALSO |
526 | ||
e08634c5 SH |
527 | The F<Changes> file for an explanation of how to view exhaustive details on |
528 | what changed. | |
44691e6f AB |
529 | |
530 | The F<INSTALL> file for how to build Perl. | |
531 | ||
532 | The F<README> file for general stuff. | |
533 | ||
534 | The F<Artistic> and F<Copying> files for copyright information. | |
535 | ||
536 | =cut |