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44691e6f AB |
1 | =encoding utf8 |
2 | ||
3 | =head1 NAME | |
4 | ||
e5998677 SH |
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 v5.21.11 | |
c68523cb | 9 | |
238894db | 10 | =head1 DESCRIPTION |
c68523cb | 11 | |
e5998677 | 12 | This document describes differences between the 5.21.10 release and the 5.21.11 |
238894db | 13 | release. |
c68523cb | 14 | |
e5998677 SH |
15 | If you are upgrading from an earlier release such as 5.21.9, first read |
16 | L<perl52110delta>, which describes differences between 5.21.9 and 5.21.10. | |
2ec11c70 | 17 | |
e5998677 | 18 | =head1 Notice |
ef8784b7 | 19 | |
e5998677 | 20 | XXX Any important notices here |
6798c95d | 21 | |
e5998677 | 22 | =head1 Core Enhancements |
6798c95d | 23 | |
e5998677 SH |
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. | |
cd7bac54 | 27 | |
e5998677 | 28 | [ List each enhancement as a =head2 entry ] |
cd7bac54 | 29 | |
e5998677 | 30 | =head1 Security |
0939a951 | 31 | |
e5998677 SH |
32 | XXX Any security-related notices go here. In particular, any security |
33 | vulnerabilities closed should be noted here rather than in the | |
34 | L</Selected Bug Fixes> section. | |
cd7bac54 | 35 | |
e5998677 | 36 | [ List each security issue as a =head2 entry ] |
cd7bac54 | 37 | |
e5998677 | 38 | =head1 Incompatible Changes |
cd7bac54 | 39 | |
e5998677 | 40 | XXX For a release on a stable branch, this section aspires to be: |
83a5d6b6 | 41 | |
e5998677 SH |
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. | |
83a5d6b6 | 45 | |
e5998677 | 46 | [ List each incompatible change as a =head2 entry ] |
b9c683b3 | 47 | |
e5998677 | 48 | =head1 Deprecations |
b9c683b3 | 49 | |
e5998677 | 50 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
b9c683b3 | 51 | |
2e4abf26 DG |
52 | =head2 Making all warnings fatal is discouraged |
53 | ||
54 | The documentation for L<fatal warnings|warnings/Fatal Warnings> notes | |
55 | that C<< use warnings FATAL => 'all' >> is discouraged | |
56 | and provides stronger language about the risks of fatal warnings | |
57 | in general. | |
58 | ||
e5998677 | 59 | =head2 Module removals |
b05565aa | 60 | |
e5998677 | 61 | XXX Remove this section if inapplicable. |
b05565aa | 62 | |
e5998677 SH |
63 | The following modules will be removed from the core distribution in a |
64 | future release, and will at that time need to be installed from CPAN. | |
65 | Distributions on CPAN which require these modules will need to list them as | |
66 | prerequisites. | |
79116533 | 67 | |
e5998677 SH |
68 | The core versions of these modules will now issue C<"deprecated">-category |
69 | warnings to alert you to this fact. To silence these deprecation warnings, | |
70 | install the modules in question from CPAN. | |
79116533 | 71 | |
e5998677 SH |
72 | Note that these are (with rare exceptions) fine modules that you are encouraged |
73 | to continue to use. Their disinclusion from core primarily hinges on their | |
74 | necessity to bootstrapping a fully functional, CPAN-capable Perl installation, | |
75 | not usually on concerns over their design. | |
79116533 | 76 | |
e5998677 | 77 | =over |
79116533 | 78 | |
e5998677 | 79 | =item XXX |
79116533 | 80 | |
e5998677 SH |
81 | XXX Note that deprecated modules should be listed here even if they are listed |
82 | as an updated module in the L</Modules and Pragmata> section. | |
79116533 | 83 | |
e5998677 | 84 | =back |
79116533 | 85 | |
e5998677 | 86 | [ List each other deprecation as a =head2 entry ] |
79116533 | 87 | |
e5998677 | 88 | =head1 Performance Enhancements |
79116533 | 89 | |
e5998677 SH |
90 | XXX Changes which enhance performance without changing behaviour go here. |
91 | There may well be none in a stable release. | |
79116533 | 92 | |
e5998677 | 93 | [ List each enhancement as a =item entry ] |
79116533 | 94 | |
e5998677 | 95 | =over 4 |
79116533 SH |
96 | |
97 | =item * | |
98 | ||
e5998677 | 99 | XXX |
79116533 SH |
100 | |
101 | =back | |
0939a951 | 102 | |
e5998677 | 103 | =head1 Modules and Pragmata |
fea59588 | 104 | |
e5998677 SH |
105 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
106 | go here. If Module::CoreList is updated, generate an initial draft of the | |
107 | following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary | |
108 | for important changes should then be added by hand. In an ideal world, | |
109 | dual-life modules would have a F<Changes> file that could be cribbed. | |
fea59588 | 110 | |
e5998677 | 111 | [ Within each section, list entries as a =item entry ] |
83a5d6b6 | 112 | |
e5998677 | 113 | =head2 New Modules and Pragmata |
83a5d6b6 | 114 | |
e5998677 | 115 | =over 4 |
338906ce SH |
116 | |
117 | =item * | |
118 | ||
e5998677 | 119 | XXX |
b05565aa | 120 | |
e5998677 | 121 | =back |
83a5d6b6 | 122 | |
e5998677 | 123 | =head2 Updated Modules and Pragmata |
83a5d6b6 | 124 | |
e5998677 | 125 | =over 4 |
e455391f SH |
126 | |
127 | =item * | |
128 | ||
79a77127 | 129 | L<attributes> has been upgraded from version 0.26 to 0.27. |
53902397 | 130 | |
79a77127 SH |
131 | =item * |
132 | ||
c14a43b7 SH |
133 | L<B> has been upgraded from version 1.57 to 1.58. |
134 | ||
135 | =item * | |
136 | ||
137 | L<B::Deparse> has been upgraded from version 1.34 to 1.35. | |
138 | ||
139 | =item * | |
140 | ||
141 | L<Config::Perl::V> has been upgraded from version 0.23 to 0.24. | |
142 | ||
143 | =item * | |
144 | ||
79a77127 | 145 | L<Cwd> has been upgraded from version 3.55 to 3.56. |
83a5d6b6 | 146 | |
abec5bed DIM |
147 | =item * |
148 | ||
149 | L<ExtUtils::Miniperl> has been upgraded from version 1.04 to 1.05. | |
150 | ||
151 | =item * | |
152 | ||
c14a43b7 SH |
153 | L<ExtUtils::ParseXS> has been upgraded from version 3.27 to 3.28. |
154 | ||
155 | =item * | |
156 | ||
157 | L<ExtUtils::Typemaps> has been upgraded from version 3.25 to 3.28. | |
158 | ||
159 | =item * | |
160 | ||
161 | L<File::Spec> has been upgraded from version 3.55 to 3.56. | |
162 | ||
163 | =item * | |
164 | ||
165 | L<if> has been upgraded from version 0.0603 to 0.0604. | |
166 | ||
167 | =item * | |
168 | ||
60dcce55 SH |
169 | L<IO::Socket::IP> has been upgraded from version 0.36 to 0.37. |
170 | ||
171 | =item * | |
172 | ||
79a77127 SH |
173 | L<Module::CoreList> has been upgraded from version 5.20150320 to 5.20150420. |
174 | ||
175 | Updated to cover the latest releases of Perl. | |
abec5bed DIM |
176 | |
177 | =item * | |
178 | ||
9749148e TC |
179 | L<perl5db.pl> has been upgraded from 1.48 to 1.49. |
180 | ||
181 | The debugger would cause an assertion failure. [perl #124127] | |
182 | ||
183 | =item * | |
184 | ||
abec5bed DIM |
185 | L<PerlIO::mmap> has been upgraded from version 0.013 to 0.014. |
186 | ||
187 | =item * | |
188 | ||
79a77127 | 189 | L<utf8> has been upgraded from version 1.15 to 1.16. |
abec5bed | 190 | |
2e4abf26 DG |
191 | =item * |
192 | ||
193 | L<warnings> has been upgraded from version 1.31 to 1.32. | |
194 | ||
e5998677 | 195 | =back |
83a5d6b6 | 196 | |
e5998677 | 197 | =head2 Removed Modules and Pragmata |
83a5d6b6 | 198 | |
e5998677 | 199 | =over 4 |
83a5d6b6 SH |
200 | |
201 | =item * | |
202 | ||
e5998677 | 203 | XXX |
83a5d6b6 | 204 | |
e5998677 | 205 | =back |
83a5d6b6 | 206 | |
e5998677 | 207 | =head1 Documentation |
83a5d6b6 | 208 | |
e5998677 SH |
209 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
210 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
83a5d6b6 | 211 | |
e5998677 | 212 | =head2 New Documentation |
b367c45d | 213 | |
e5998677 | 214 | XXX Changes which create B<new> files in F<pod/> go here. |
b367c45d | 215 | |
e5998677 | 216 | =head3 L<XXX> |
b367c45d | 217 | |
e5998677 | 218 | XXX Description of the purpose of the new file here |
338906ce | 219 | |
e5998677 | 220 | =head2 Changes to Existing Documentation |
338906ce | 221 | |
e5998677 SH |
222 | XXX Changes which significantly change existing files in F<pod/> go here. |
223 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
224 | section. | |
83a5d6b6 | 225 | |
e5998677 | 226 | =head3 L<XXX> |
83a5d6b6 | 227 | |
e5998677 | 228 | =over 4 |
83a5d6b6 SH |
229 | |
230 | =item * | |
231 | ||
e5998677 | 232 | XXX Description of the change here |
83a5d6b6 | 233 | |
e5998677 | 234 | =back |
338906ce | 235 | |
e5998677 | 236 | =head1 Diagnostics |
338906ce | 237 | |
e5998677 SH |
238 | The following additions or changes have been made to diagnostic output, |
239 | including warnings and fatal error messages. For the complete list of | |
240 | diagnostic messages, see L<perldiag>. | |
338906ce | 241 | |
e5998677 SH |
242 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
243 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
338906ce | 244 | |
e5998677 | 245 | =head2 New Diagnostics |
9409f752 | 246 | |
e5998677 SH |
247 | XXX Newly added diagnostic messages go under here, separated into New Errors |
248 | and New Warnings | |
9409f752 | 249 | |
e5998677 | 250 | =head3 New Errors |
03a97c81 | 251 | |
e5998677 | 252 | =over 4 |
03a97c81 SH |
253 | |
254 | =item * | |
255 | ||
e5998677 | 256 | XXX L<message|perldiag/"message"> |
a790e348 | 257 | |
e5998677 | 258 | =back |
83a5d6b6 | 259 | |
e5998677 | 260 | =head3 New Warnings |
83a5d6b6 | 261 | |
e5998677 | 262 | =over 4 |
126be117 JH |
263 | |
264 | =item * | |
265 | ||
e5998677 | 266 | XXX L<message|perldiag/"message"> |
83a5d6b6 | 267 | |
a9c3e753 | 268 | =back |
0939a951 | 269 | |
e5998677 | 270 | =head2 Changes to Existing Diagnostics |
d2fff9f6 | 271 | |
e5998677 | 272 | XXX Changes (i.e. rewording) of diagnostic messages go here |
e329daf3 | 273 | |
cd7bac54 | 274 | =over 4 |
e329daf3 | 275 | |
cd7bac54 | 276 | =item * |
e329daf3 | 277 | |
e5998677 | 278 | XXX Describe change here |
83a5d6b6 SH |
279 | |
280 | =back | |
281 | ||
e5998677 | 282 | =head1 Utility Changes |
83a5d6b6 | 283 | |
e5998677 SH |
284 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
285 | Most of these are built within the directory F<utils>. | |
83a5d6b6 | 286 | |
e5998677 SH |
287 | [ List utility changes as a =head2 entry for each utility and =item |
288 | entries for each change | |
289 | Use L<XXX> with program names to get proper documentation linking. ] | |
83a5d6b6 | 290 | |
e5998677 | 291 | =head2 L<XXX> |
83a5d6b6 SH |
292 | |
293 | =over 4 | |
294 | ||
295 | =item * | |
296 | ||
e5998677 | 297 | XXX |
ba31029d | 298 | |
cd7bac54 S |
299 | =back |
300 | ||
e5998677 | 301 | =head1 Configuration and Compilation |
cd7bac54 | 302 | |
e5998677 SH |
303 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
304 | go here. Any other changes to the Perl build process should be listed here. | |
305 | However, any platform-specific changes should be listed in the | |
306 | L</Platform Support> section, instead. | |
cd7bac54 | 307 | |
e5998677 | 308 | [ List changes as a =item entry ]. |
cd7bac54 S |
309 | |
310 | =over 4 | |
311 | ||
312 | =item * | |
313 | ||
e5998677 | 314 | XXX |
cd7bac54 S |
315 | |
316 | =back | |
541e1e0d | 317 | |
a9c3e753 | 318 | =head1 Testing |
cd7bac54 | 319 | |
e5998677 SH |
320 | XXX Any significant changes to the testing of a freshly built perl should be |
321 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
322 | large changes to the testing harness (e.g. when parallel testing was added). | |
323 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
324 | that they represent may be covered elsewhere. | |
325 | ||
326 | [ List each test improvement as a =item entry ] | |
327 | ||
b5d4d3b9 | 328 | =over 4 |
83b69bfd DD |
329 | |
330 | =item * | |
331 | ||
e5998677 | 332 | XXX |
13adb056 | 333 | |
b5d4d3b9 | 334 | =back |
391823f2 | 335 | |
a9c3e753 | 336 | =head1 Platform Support |
6c8457e9 | 337 | |
e5998677 | 338 | XXX Any changes to platform support should be listed in the sections below. |
fdcaecb7 | 339 | |
e5998677 SH |
340 | [ Within the sections, list each platform as a =item entry with specific |
341 | changes as paragraphs below it. ] | |
ce1e892e | 342 | |
e5998677 | 343 | =head2 New Platforms |
2af7c6b6 | 344 | |
e5998677 SH |
345 | XXX List any platforms that this version of perl compiles on, that previous |
346 | versions did not. These will either be enabled by new files in the F<hints/> | |
347 | directories, or new subdirectories and F<README> files at the top level of the | |
348 | source tree. | |
8c847e66 | 349 | |
2ff1ebfe | 350 | =over 4 |
d345f487 | 351 | |
e5998677 | 352 | =item XXX-some-platform |
d345f487 | 353 | |
e5998677 | 354 | XXX |
cd7bac54 | 355 | |
4dc623f0 | 356 | =back |
353075a0 | 357 | |
e5998677 | 358 | =head2 Discontinued Platforms |
9f122eef | 359 | |
e5998677 | 360 | XXX List any platforms that this version of perl no longer compiles on. |
2ec11c70 | 361 | |
e5998677 | 362 | =over 4 |
2ec11c70 | 363 | |
e5998677 | 364 | =item XXX-some-platform |
2683609f | 365 | |
e5998677 | 366 | XXX |
338906ce | 367 | |
4dc623f0 | 368 | =back |
c7f058f0 | 369 | |
e5998677 | 370 | =head2 Platform-Specific Notes |
2bf83140 | 371 | |
e5998677 SH |
372 | XXX List any changes for specific platforms. This could include configuration |
373 | and compilation changes or changes in portability/compatibility. However, | |
374 | changes within modules for platforms should generally be listed in the | |
375 | L</Modules and Pragmata> section. | |
041a5927 | 376 | |
e5998677 | 377 | =over 4 |
041a5927 | 378 | |
86e0176a | 379 | =item Win32 |
69e954a5 | 380 | |
86e0176a TC |
381 | F<miniperl.exe> is now built with C<-fno-strict-aliasing>, allowing |
382 | 64-bit builds to complete on GCC 4.8. [perl #123976] | |
383 | ||
384 | C<test-prep> again depends on C<test-prep-gcc> for GCC builds. [perl | |
385 | #124221] | |
69e954a5 | 386 | |
e5998677 | 387 | =back |
20b5e916 | 388 | |
e5998677 | 389 | =head1 Internal Changes |
d76c14eb | 390 | |
532ecd00 DM |
391 | =over 4 |
392 | ||
393 | =item * | |
d76c14eb | 394 | |
532ecd00 DM |
395 | 5.21.2 introduced a new build option, C<-DPERL_OP_PARENT>, which causes |
396 | the last C<op_sibling> pointer to refer back to the parent rather than | |
397 | being C<NULL>, and where instead a new flag indicates the end of the | |
398 | chain. In this release, the new implementation has been revised; in | |
399 | particular: | |
d547bad0 | 400 | |
e5998677 | 401 | =over 4 |
d547bad0 | 402 | |
8a95d307 FC |
403 | =item * |
404 | ||
532ecd00 DM |
405 | On C<PERL_OP_PARENT> builds, the C<op_sibling> field has been renamed |
406 | C<op_sibparent> to reflect its new dual purpose. Since the intention is that | |
407 | this field should primarily be accessed via macros, this change should be | |
408 | transparent for code written to work under C<PERL_OP_PARENT>. | |
409 | ||
410 | =item * | |
411 | ||
412 | The newly-introduced C<op_lastsib> flag bit has been renamed C<op_moresib> | |
413 | and its logic inverted; i.e. it is initialised to zero in a new op, and is | |
414 | changed to 1 when an op gains a sibling. | |
415 | ||
416 | =item * | |
417 | ||
418 | The function C<Perl_op_parent> is now only available on C<PERL_OP_PARENT> | |
419 | builds. Using it on a plain build will be a compile-timer error. | |
420 | ||
421 | =item * | |
422 | ||
423 | Three new macros, C<OpMORESIB_set>, C<OpLASTSIB_set>, C<OpMAYBESIB_set> | |
424 | have been added, which are intended to be be a low-level portable way to | |
425 | set C<op_sibling> / C<op_sibparent> while also updating C<op_moresib>. | |
426 | The first sets the sibling pointer to a new sibling, the second makes the | |
427 | op the last sibling, and the third conditionally does the first or second | |
428 | action. The C<op_sibling_splice()> function is retained as a higher-level | |
429 | interface that can also maintain consistency in the parent at the same time | |
430 | (e.g. by updating C<op_first> and C<op_last> where appropriate). | |
431 | ||
432 | =item * | |
433 | ||
434 | The macro C<OpSIBLING_set>, added in 5.21.2, has been removed. It didn't | |
435 | manipulate C<op_moresib> and has been superseded by C<OpMORESIB_set> et | |
436 | al. | |
437 | ||
438 | =item * | |
439 | ||
440 | The C<op_sibling_splice> function now accepts a null C<parent> argument | |
441 | where the splicing doesn't affect the first or last ops in the sibling | |
442 | chain, and thus where the parent doesn't need to be updated accordingly. | |
443 | ||
444 | =back | |
445 | ||
8a95d307 | 446 | |
e5998677 | 447 | =back |
338906ce | 448 | |
e5998677 | 449 | =head1 Selected Bug Fixes |
338906ce | 450 | |
e5998677 SH |
451 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
452 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
338906ce | 453 | |
e5998677 | 454 | [ List each fix as a =item entry ] |
338906ce | 455 | |
e5998677 | 456 | =over 4 |
338906ce SH |
457 | |
458 | =item * | |
459 | ||
e42530d2 TC |
460 | C<pack("D", $x)> and C<pack("F", $x)> now zero the padding on x86 long |
461 | double builds. GCC 4.8 and later, under some build options, would | |
462 | either overwrite the zero-initialized padding, or bypass the | |
463 | initialized buffer entirely. This caused F<op/pack.t> to fail. [perl | |
464 | #123971] | |
2f304be9 | 465 | |
9749148e TC |
466 | =item * |
467 | ||
468 | Extending an array cloned from a parent thread could result in | |
469 | "Modification of a read-only value attempted" errors when attempting | |
470 | to modify the new elements. [perl #124127] | |
471 | ||
a9c3e753 | 472 | =back |
ea13b07e | 473 | |
a9c3e753 | 474 | =head1 Known Problems |
b65adbec | 475 | |
e5998677 SH |
476 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
477 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
478 | platform specific bugs also go here. | |
b94c7836 | 479 | |
e5998677 | 480 | [ List each fix as a =item entry ] |
ce1e892e KW |
481 | |
482 | =over 4 | |
483 | ||
484 | =item * | |
485 | ||
e5998677 | 486 | XXX |
ce1e892e | 487 | |
e5998677 | 488 | =back |
ce1e892e | 489 | |
e5998677 | 490 | =head1 Errata From Previous Releases |
ce1e892e | 491 | |
e5998677 | 492 | =over 4 |
ce1e892e | 493 | |
e5998677 | 494 | =item * |
ce1e892e | 495 | |
e5998677 SH |
496 | XXX Add anything here that we forgot to add, or were mistaken about, in |
497 | the perldelta of a previous release. | |
ce1e892e | 498 | |
a9c3e753 | 499 | =back |
e3e8f263 | 500 | |
e5998677 | 501 | =head1 Obituary |
0d42058e | 502 | |
e5998677 SH |
503 | XXX If any significant core contributor has died, we've added a short obituary |
504 | here. | |
0d42058e | 505 | |
e5998677 | 506 | =head1 Acknowledgements |
0d42058e | 507 | |
e5998677 | 508 | XXX Generate this with: |
0d42058e | 509 | |
e5998677 | 510 | perl Porting/acknowledgements.pl v5.21.10..HEAD |
f5b73711 | 511 | |
44691e6f AB |
512 | =head1 Reporting Bugs |
513 | ||
e08634c5 SH |
514 | If you find what you think is a bug, you might check the articles recently |
515 | posted to the comp.lang.perl.misc newsgroup and the perl bug database at | |
e5998677 SH |
516 | https://rt.perl.org/ . There may also be information at |
517 | http://www.perl.org/ , the Perl Home Page. | |
44691e6f | 518 | |
e08634c5 SH |
519 | If you believe you have an unreported bug, please run the L<perlbug> program |
520 | included with your release. Be sure to trim your bug down to a tiny but | |
521 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
522 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. | |
44691e6f AB |
523 | |
524 | If the bug you are reporting has security implications, which make it | |
e08634c5 SH |
525 | inappropriate to send to a publicly archived mailing list, then please send it |
526 | to perl5-security-report@perl.org. This points to a closed subscription | |
527 | unarchived mailing list, which includes all the core committers, who will be | |
528 | able to help assess the impact of issues, figure out a resolution, and help | |
f9001595 | 529 | co-ordinate the release of patches to mitigate or fix the problem across all |
e08634c5 SH |
530 | platforms on which Perl is supported. Please only use this address for |
531 | security issues in the Perl core, not for modules independently distributed on | |
532 | CPAN. | |
44691e6f AB |
533 | |
534 | =head1 SEE ALSO | |
535 | ||
e08634c5 SH |
536 | The F<Changes> file for an explanation of how to view exhaustive details on |
537 | what changed. | |
44691e6f AB |
538 | |
539 | The F<INSTALL> file for how to build Perl. | |
540 | ||
541 | The F<README> file for general stuff. | |
542 | ||
543 | The F<Artistic> and F<Copying> files for copyright information. | |
544 | ||
545 | =cut |