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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 | ||
1e189079 | 127 | L<XXX> has been upgraded from version A.xx to B.yy. |
9a4e033c | 128 | |
516aa7ad JK |
129 | =item * |
130 | ||
89e2d2f3 | 131 | L<ExtUtils::CBuilder> has been upgraded from version 0.280225 to 0.280227. |
516aa7ad | 132 | |
af94b3ac Z |
133 | =item * |
134 | ||
135 | L<Time::HiRes> has been upgraded from version 1.9742 to 1.9743. | |
136 | ||
1b510166 | 137 | =back |
16beba24 | 138 | |
1e189079 | 139 | =head2 Removed Modules and Pragmata |
a049258c S |
140 | |
141 | =over 4 | |
fbe3f407 | 142 | |
759020c9 | 143 | =item * |
7ca0bfc4 | 144 | |
1e189079 | 145 | XXX |
1b510166 | 146 | |
1e189079 | 147 | =back |
9a4e033c | 148 | |
1e189079 | 149 | =head1 Documentation |
9a4e033c | 150 | |
1e189079 EH |
151 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
152 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
9a4e033c | 153 | |
1e189079 | 154 | =head2 New Documentation |
1b510166 | 155 | |
1e189079 | 156 | XXX Changes which create B<new> files in F<pod/> go here. |
1b510166 | 157 | |
1e189079 | 158 | =head3 L<XXX> |
1b510166 | 159 | |
1e189079 | 160 | XXX Description of the purpose of the new file here |
1b510166 | 161 | |
1e189079 | 162 | =head2 Changes to Existing Documentation |
1b510166 | 163 | |
1e189079 EH |
164 | We have attempted to update the documentation to reflect the changes |
165 | listed in this document. If you find any we have missed, send email | |
166 | to L<perlbug@perl.org|mailto:perlbug@perl.org>. | |
1b510166 | 167 | |
1e189079 EH |
168 | XXX Changes which significantly change existing files in F<pod/> go here. |
169 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
170 | section. | |
f717dc4d | 171 | |
1e189079 | 172 | Additionally, the following selected changes have been made: |
1b510166 | 173 | |
1e189079 | 174 | =head3 L<XXX> |
1b510166 | 175 | |
1e189079 | 176 | =over 4 |
a049258c | 177 | |
2c8edc25 | 178 | =item * |
d5c7a4fc | 179 | |
1e189079 | 180 | XXX Description of the change here |
a049258c | 181 | |
1e189079 | 182 | =back |
3abe9611 | 183 | |
1e189079 | 184 | =head1 Diagnostics |
1b510166 | 185 | |
1e189079 EH |
186 | The following additions or changes have been made to diagnostic output, |
187 | including warnings and fatal error messages. For the complete list of | |
188 | diagnostic messages, see L<perldiag>. | |
1b510166 | 189 | |
1e189079 EH |
190 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
191 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
1b510166 | 192 | |
1e189079 | 193 | =head2 New Diagnostics |
1b510166 | 194 | |
1e189079 EH |
195 | XXX Newly added diagnostic messages go under here, separated into New Errors |
196 | and New Warnings | |
1b510166 | 197 | |
1e189079 | 198 | =head3 New Errors |
1b510166 | 199 | |
1e189079 | 200 | =over 4 |
1b510166 S |
201 | |
202 | =item * | |
203 | ||
1e189079 | 204 | XXX L<message|perldiag/"message"> |
1b510166 | 205 | |
1e189079 | 206 | =back |
1b510166 | 207 | |
1e189079 EH |
208 | =head3 New Warnings |
209 | ||
210 | =over 4 | |
1b510166 S |
211 | |
212 | =item * | |
213 | ||
1e189079 | 214 | XXX L<message|perldiag/"message"> |
1b510166 | 215 | |
1e189079 | 216 | =back |
1b510166 | 217 | |
1e189079 | 218 | =head2 Changes to Existing Diagnostics |
1b510166 | 219 | |
1e189079 | 220 | XXX Changes (i.e. rewording) of diagnostic messages go here |
1b510166 | 221 | |
1e189079 | 222 | =over 4 |
1b510166 S |
223 | |
224 | =item * | |
225 | ||
1e189079 | 226 | XXX Describe change here |
1b510166 | 227 | |
1e189079 | 228 | =back |
0cc8c746 | 229 | |
1e189079 | 230 | =head1 Utility Changes |
0cc8c746 | 231 | |
1e189079 EH |
232 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
233 | Most of these are built within the directory F<utils>. | |
0cc8c746 | 234 | |
1e189079 EH |
235 | [ List utility changes as a =head2 entry for each utility and =item |
236 | entries for each change | |
237 | Use L<XXX> with program names to get proper documentation linking. ] | |
0cc8c746 | 238 | |
1e189079 | 239 | =head2 L<XXX> |
0cc8c746 | 240 | |
1e189079 | 241 | =over 4 |
1b510166 S |
242 | |
243 | =item * | |
244 | ||
1e189079 | 245 | XXX |
1b510166 | 246 | |
1e189079 | 247 | =back |
1b510166 | 248 | |
1e189079 | 249 | =head1 Configuration and Compilation |
1b510166 | 250 | |
1e189079 EH |
251 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
252 | go here. Any other changes to the Perl build process should be listed here. | |
253 | However, any platform-specific changes should be listed in the | |
254 | L</Platform Support> section, instead. | |
255 | ||
256 | [ List changes as a =item entry ]. | |
1b510166 | 257 | |
1e189079 | 258 | =over 4 |
1b510166 S |
259 | |
260 | =item * | |
261 | ||
1e189079 | 262 | XXX |
1b510166 S |
263 | |
264 | =back | |
265 | ||
266 | =head1 Testing | |
267 | ||
1e189079 EH |
268 | XXX Any significant changes to the testing of a freshly built perl should be |
269 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
270 | large changes to the testing harness (e.g. when parallel testing was added). | |
271 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
272 | that they represent may be covered elsewhere. | |
273 | ||
274 | XXX If there were no significant test changes, say this: | |
275 | ||
276 | Tests were added and changed to reflect the other additions and changes | |
277 | in this release. | |
278 | ||
279 | XXX If instead there were significant changes, say this: | |
280 | ||
f717dc4d KW |
281 | Tests were added and changed to reflect the other additions and |
282 | changes in this release. Furthermore, these significant changes were | |
283 | made: | |
1b510166 | 284 | |
1e189079 | 285 | [ List each test improvement as a =item entry ] |
1b510166 | 286 | |
1e189079 | 287 | =over 4 |
1b510166 | 288 | |
10b7d799 TC |
289 | =item * |
290 | ||
1e189079 | 291 | XXX |
10b7d799 | 292 | |
1b510166 S |
293 | =back |
294 | ||
295 | =head1 Platform Support | |
296 | ||
1e189079 | 297 | XXX Any changes to platform support should be listed in the sections below. |
1b510166 | 298 | |
1e189079 EH |
299 | [ Within the sections, list each platform as a =item entry with specific |
300 | changes as paragraphs below it. ] | |
301 | ||
302 | =head2 New Platforms | |
1b510166 | 303 | |
1e189079 EH |
304 | XXX List any platforms that this version of perl compiles on, that previous |
305 | versions did not. These will either be enabled by new files in the F<hints/> | |
306 | directories, or new subdirectories and F<README> files at the top level of the | |
307 | source tree. | |
1b510166 | 308 | |
d8efeb46 SH |
309 | =over 4 |
310 | ||
1e189079 | 311 | =item XXX-some-platform |
d8efeb46 | 312 | |
1e189079 | 313 | XXX |
d8efeb46 SH |
314 | |
315 | =back | |
1b510166 | 316 | |
1e189079 EH |
317 | =head2 Discontinued Platforms |
318 | ||
319 | XXX List any platforms that this version of perl no longer compiles on. | |
320 | ||
321 | =over 4 | |
322 | ||
323 | =item XXX-some-platform | |
324 | ||
325 | XXX | |
326 | ||
1b510166 S |
327 | =back |
328 | ||
1e189079 EH |
329 | =head2 Platform-Specific Notes |
330 | ||
331 | XXX List any changes for specific platforms. This could include configuration | |
332 | and compilation changes or changes in portability/compatibility. However, | |
333 | changes within modules for platforms should generally be listed in the | |
334 | L</Modules and Pragmata> section. | |
1b510166 | 335 | |
1b510166 S |
336 | =over 4 |
337 | ||
1e189079 | 338 | =item XXX-some-platform |
1b510166 | 339 | |
1e189079 | 340 | XXX |
1b510166 | 341 | |
1e189079 EH |
342 | =back |
343 | ||
344 | =head1 Internal Changes | |
345 | ||
346 | XXX Changes which affect the interface available to C<XS> code go here. Other | |
347 | significant internal changes for future core maintainers should be noted as | |
348 | well. | |
f566c7cf | 349 | |
1e189079 EH |
350 | [ List each change as a =item entry ] |
351 | ||
352 | =over 4 | |
f566c7cf | 353 | |
0cbf5865 KW |
354 | =item * |
355 | ||
1e189079 | 356 | XXX |
0cbf5865 | 357 | |
1b510166 S |
358 | =back |
359 | ||
360 | =head1 Selected Bug Fixes | |
361 | ||
1e189079 EH |
362 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
363 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
364 | ||
365 | [ List each fix as a =item entry ] | |
366 | ||
1b510166 S |
367 | =over 4 |
368 | ||
369 | =item * | |
370 | ||
43901c14 TC |
371 | List assignment (C<aassign>) could in some rare cases allocate an |
372 | entry on the mortal stack and leave the entry uninitialized. [perl | |
373 | #131570] | |
1b510166 | 374 | |
3072e759 TC |
375 | =item * |
376 | ||
377 | Attempting to apply an attribute to an C<our> variable where a | |
378 | function of that name already exists could result in a NULL pointer | |
379 | being supplied where an SV was expected, crashing perl. [perl | |
380 | #131597] | |
381 | ||
20ae58f7 AC |
382 | =item * |
383 | ||
384 | C<split ' '> now correctly handles the argument being split when in the | |
385 | scope of the L<< C<unicode_strings>|feature/"The 'unicode_strings' feature" | |
386 | >> feature. Previously, when a string using the single-byte internal | |
387 | representation contained characters that are whitespace by Unicode rules but | |
388 | not by ASCII rules, it treated those characters as part of fields rather | |
389 | than as field separators. [perl #130907] | |
390 | ||
ab9a6a63 AC |
391 | =item * |
392 | ||
393 | Several built-in functions previously had bugs that could cause them to | |
394 | write to the internal stack without allocating room for the item being | |
395 | written. In rare situations, this could have led to a crash. These bugs have | |
396 | now been fixed, and if any similar bugs are introduced in future, they will | |
397 | be detected automatically in debugging builds. | |
398 | ||
399 | =item * | |
400 | ||
401 | Using a symbolic ref with postderef syntax as the key in a hash lookup was | |
402 | yielding an assertion failure on debugging builds. [perl #131627] | |
403 | ||
404 | =item * | |
405 | ||
406 | Array and hash variables whose names begin with a caret now admit indexing | |
407 | inside their curlies when interpolated into strings, as in C<< | |
408 | "${^CAPTURE[0]}" >> to index C<@{^CAPTURE}>. [perl #131664] | |
409 | ||
1e189079 | 410 | =back |
9a4e033c | 411 | |
1e189079 | 412 | =head1 Known Problems |
9a4e033c | 413 | |
1e189079 EH |
414 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
415 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
416 | platform specific bugs also go here. | |
9a4e033c | 417 | |
1e189079 | 418 | [ List each fix as a =item entry ] |
9a4e033c | 419 | |
1e189079 EH |
420 | =over 4 |
421 | ||
422 | =item * | |
423 | ||
424 | XXX | |
9a4e033c | 425 | |
1b510166 S |
426 | =back |
427 | ||
1e189079 | 428 | =head1 Errata From Previous Releases |
1b510166 | 429 | |
1e189079 EH |
430 | =over 4 |
431 | ||
432 | =item * | |
1b510166 | 433 | |
1e189079 EH |
434 | XXX Add anything here that we forgot to add, or were mistaken about, in |
435 | the perldelta of a previous release. | |
1b510166 | 436 | |
1e189079 EH |
437 | =back |
438 | ||
439 | =head1 Obituary | |
1b510166 | 440 | |
1e189079 EH |
441 | XXX If any significant core contributor has died, we've added a short obituary |
442 | here. | |
1b510166 | 443 | |
1e189079 | 444 | =head1 Acknowledgements |
0cc8c746 | 445 | |
1e189079 | 446 | XXX Generate this with: |
2e0dcc12 | 447 | |
1e189079 | 448 | perl Porting/acknowledgements.pl v5.25.5..HEAD |
f5b73711 | 449 | |
44691e6f AB |
450 | =head1 Reporting Bugs |
451 | ||
b5cbfe35 S |
452 | If you find what you think is a bug, you might check the perl bug database |
453 | at L<https://rt.perl.org/> . There may also be information at | |
454 | L<http://www.perl.org/> , the Perl Home Page. | |
44691e6f | 455 | |
e08634c5 SH |
456 | If you believe you have an unreported bug, please run the L<perlbug> program |
457 | included with your release. Be sure to trim your bug down to a tiny but | |
458 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
b5cbfe35 | 459 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. |
44691e6f | 460 | |
87c118b9 DM |
461 | If the bug you are reporting has security implications which make it |
462 | inappropriate to send to a publicly archived mailing list, then see | |
c0ea3294 SH |
463 | L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION> |
464 | for details of how to report the issue. | |
44691e6f | 465 | |
390ae6f9 S |
466 | =head1 Give Thanks |
467 | ||
468 | If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, | |
469 | you can do so by running the C<perlthanks> program: | |
470 | ||
471 | perlthanks | |
472 | ||
473 | This will send an email to the Perl 5 Porters list with your show of thanks. | |
474 | ||
44691e6f AB |
475 | =head1 SEE ALSO |
476 | ||
e08634c5 SH |
477 | The F<Changes> file for an explanation of how to view exhaustive details on |
478 | what changed. | |
44691e6f AB |
479 | |
480 | The F<INSTALL> file for how to build Perl. | |
481 | ||
482 | The F<README> file for general stuff. | |
483 | ||
484 | The F<Artistic> and F<Copying> files for copyright information. | |
485 | ||
486 | =cut |