| 1 | =encoding utf8 |
| 2 | |
| 3 | =for rafl |
| 4 | changelogged up to commit d6fa5a34 |
| 5 | * PERL_STATIC_INLINE might want to be mentioned |
| 6 | |
| 7 | =head1 NAME |
| 8 | |
| 9 | [ this is a template for a new perldelta file. Any text flagged as |
| 10 | XXX needs to be processed before release. ] |
| 11 | |
| 12 | perldelta - what is new for perl v5.13.4 |
| 13 | |
| 14 | =head1 DESCRIPTION |
| 15 | |
| 16 | This document describes differences between the 5.13.4 release and |
| 17 | the 5.13.3 release. |
| 18 | |
| 19 | If you are upgrading from an earlier release such as 5.13.2, first read |
| 20 | L<perl5133delta>, which describes differences between 5.13.2 and |
| 21 | 5.13.3. |
| 22 | |
| 23 | =head1 Notice |
| 24 | |
| 25 | XXX Any important notices here |
| 26 | |
| 27 | =head1 Core Enhancements |
| 28 | |
| 29 | XXX New core language features go here. Summarise user-visible core language |
| 30 | enhancements. Particularly prominent performance optimisations could go |
| 31 | here, but most should go in the L</Performance Enhancements> section. |
| 32 | |
| 33 | [ List each enhancement as a =head2 entry ] |
| 34 | |
| 35 | =head2 C<\N{I<name>}> and C<charnames> enhancements |
| 36 | |
| 37 | C<\N{}>, C<charnames::vianame>, C<charnames::viacode> now know about every |
| 38 | character in Unicode. Previously, they didn't know about the Hangul syllables |
| 39 | nor a number of CJK (Chinese/Japanese/Korean) characters. |
| 40 | |
| 41 | =head2 C<srand()> now returns the seed |
| 42 | |
| 43 | This allows programs which need to have repeatable results to not have to come |
| 44 | up with their own seed generating mechanism. Instead, they can use C<srand()> |
| 45 | and somehow stash the return for future use. Typical is a test program which |
| 46 | has too many combinations to test comprehensively in the time available to it |
| 47 | each run. It can test a random subset each time, and should there be a |
| 48 | failure, log the seed used for that run so that it can later be used to |
| 49 | reproduce the exact results. |
| 50 | |
| 51 | =head1 Security |
| 52 | |
| 53 | XXX Any security-related notices go here. In particular, any security |
| 54 | vulnerabilities closed should be noted here rather than in the |
| 55 | L</Selected Bug Fixes> section. |
| 56 | |
| 57 | [ List each security issue as a =head2 entry ] |
| 58 | |
| 59 | =head1 Incompatible Changes |
| 60 | |
| 61 | =head2 Declare API incompatibility between blead releases |
| 62 | |
| 63 | Only stable releases (5.10.x, 5.12.x, 5.14.x, ...) guarantee binary |
| 64 | compatibility with each other, while blead releases (5.13.x, 5.15.x, ...) often |
| 65 | break this compatibility. However, prior to perl 5.13.4, all blead releases had |
| 66 | the same C<PERL_API_REVISION>, C<PERL_API_VERSION>, and C<PERL_API_SUBVERSION>, |
| 67 | effectively declaring them as binary compatible, which they weren't. From now |
| 68 | on, blead releases will have a C<PERL_API_SUBVERSION> equal to their |
| 69 | C<PERL_SUBVERSION>, explicitly marking them as incompatible with each other. |
| 70 | |
| 71 | Maintainance releases of stable perl versions will continue to make no |
| 72 | intentionally incompatible API changes. |
| 73 | |
| 74 | =head2 Check API compatibility when loading XS modules |
| 75 | |
| 76 | When perl's API changes in incompatible ways (which usually happens between |
| 77 | every major release), XS modules compiled for previous versions of perl will not |
| 78 | work anymore. They will need to be recompiled against the new perl. |
| 79 | |
| 80 | In order to ensure that modules are recompiled, and to prevent users from |
| 81 | accidentally loading modules compiled for old perls into newer ones, the |
| 82 | C<XS_APIVERSION_BOOTCHECK> macro has been added. That macro, which is called |
| 83 | when loading every newly compiled extension, compares the API version of the |
| 84 | running perl with the version a module has been compiled for and raises an |
| 85 | exception if they don't match. |
| 86 | |
| 87 | =head2 Binary Incompatible with all previous Perls |
| 88 | |
| 89 | Some bit fields have been reordered, hence this release will not be binary |
| 90 | comptible with any previous Perl release. |
| 91 | |
| 92 | =head1 Deprecations |
| 93 | |
| 94 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
| 95 | In particular, deprecated modules should be listed here even if they are |
| 96 | listed as an updated module in the L</Modules and Pragmata> section. |
| 97 | |
| 98 | [ List each deprecation as a =head2 entry ] |
| 99 | |
| 100 | =head1 Performance Enhancements |
| 101 | |
| 102 | XXX Changes which enhance performance without changing behaviour go here. There |
| 103 | may well be none in a stable release. |
| 104 | |
| 105 | [ List each enhancement as a =item * entry ] |
| 106 | |
| 107 | =over 4 |
| 108 | |
| 109 | =item * |
| 110 | |
| 111 | XXX |
| 112 | |
| 113 | =back |
| 114 | |
| 115 | =head1 Modules and Pragmata |
| 116 | |
| 117 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
| 118 | go here. If Module::CoreList is updated, generate an initial draft of the |
| 119 | following sections using F<Porting/corelist-perldelta.pl>, which prints stub |
| 120 | entries to STDOUT. Results can be pasted in place of the '=head2' entries |
| 121 | below. A paragraph summary for important changes should then be added by hand. |
| 122 | In an ideal world, dual-life modules would have a F<Changes> file that could be |
| 123 | cribbed. |
| 124 | |
| 125 | [ Within each section, list entries as a =item NAME entry ] |
| 126 | |
| 127 | =head2 New Modules and Pragmata |
| 128 | |
| 129 | =over 4 |
| 130 | |
| 131 | =item * |
| 132 | |
| 133 | XXX |
| 134 | |
| 135 | =back |
| 136 | |
| 137 | =head2 Updated Modules and Pragmata |
| 138 | |
| 139 | =over 4 |
| 140 | |
| 141 | =item C<Archive::Tar> |
| 142 | |
| 143 | Upgraded from version 1.64 to 1.66. |
| 144 | |
| 145 | Among other things, the new version adds a new option to C<ptar> to allow safe |
| 146 | creation of tarballs without world-writable files on Windows, allowing those |
| 147 | archives to be uploaded to CPAN. |
| 148 | |
| 149 | =item C<B::Lint> |
| 150 | |
| 151 | Upgraded from version 1.11 to 1.12. |
| 152 | |
| 153 | =item C<Carp> |
| 154 | |
| 155 | Upgraded from version 1.16 to 1.18. |
| 156 | |
| 157 | L<Carp> now detects incomplete L<caller()|perlfunc/"caller EXPR"> overrides and |
| 158 | avoids using bogus C<@DB::args>. This fixes certain cases of C<Bizarre copy of |
| 159 | ARRAY> caused by modules overriding C<caller()> incorrectly. |
| 160 | |
| 161 | =item C<Compress::Raw::Bzip2> |
| 162 | |
| 163 | Upgraded from version 2.027 to 2.030. |
| 164 | |
| 165 | =item C<Compress::Raw::Zlib> |
| 166 | |
| 167 | Upgraded from version 2.027 to 2.030. |
| 168 | |
| 169 | =item C<File::Spec> |
| 170 | |
| 171 | Upgraded from version 3.31 to 3.31_01. |
| 172 | |
| 173 | Various issues in L<File::Spec::VMS> have been fixed. |
| 174 | |
| 175 | =item C<IO::Compress> |
| 176 | |
| 177 | Upgraded from version 2.027 to 2.030. |
| 178 | |
| 179 | =back |
| 180 | |
| 181 | =head2 Removed Modules and Pragmata |
| 182 | |
| 183 | =over 4 |
| 184 | |
| 185 | =item * |
| 186 | |
| 187 | XXX |
| 188 | |
| 189 | =back |
| 190 | |
| 191 | =head1 Documentation |
| 192 | |
| 193 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
| 194 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. |
| 195 | |
| 196 | =head2 New Documentation |
| 197 | |
| 198 | XXX Changes which create B<new> files in F<pod/> go here. |
| 199 | |
| 200 | =head3 L<XXX> |
| 201 | |
| 202 | XXX Description of the purpose of the new file here |
| 203 | |
| 204 | =head2 Changes to Existing Documentation |
| 205 | |
| 206 | XXX Changes which significantly change existing files in F<pod/> go here. |
| 207 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> |
| 208 | section. |
| 209 | |
| 210 | =head3 L<perldiag> |
| 211 | |
| 212 | =over 4 |
| 213 | |
| 214 | =item * |
| 215 | |
| 216 | The following existing diagnostics are now documented: |
| 217 | |
| 218 | =over 4 |
| 219 | |
| 220 | =item * |
| 221 | |
| 222 | L<Ambiguous use of %c resolved as operator %c|perldiag/"Ambiguous use of %c resolved as operator %c"> |
| 223 | |
| 224 | =item * |
| 225 | |
| 226 | L<Ambiguous use of %c{%s} resolved to %c%s|perldiag/"Ambiguous use of %c{%s} resolved to %c%s"> |
| 227 | |
| 228 | =item * |
| 229 | |
| 230 | L<Ambiguous use of %c{%s%s} resolved to %c%s%s|perldiag/"Ambiguous use of %c{%s%s} resolved to %c%s%s"> |
| 231 | |
| 232 | =item * |
| 233 | |
| 234 | L<Ambiguous use of -%s resolved as -&%s()|perldiag/"Ambiguous use of -%s resolved as -&%s()"> |
| 235 | |
| 236 | =back |
| 237 | |
| 238 | =back |
| 239 | |
| 240 | =head3 L<perlport> |
| 241 | |
| 242 | =over 4 |
| 243 | |
| 244 | =item * |
| 245 | |
| 246 | Documented a L<limitation|perlport/alarm> of L<alarm()|perlfunc/"alarm SECONDS"> |
| 247 | on Win32. |
| 248 | |
| 249 | =back |
| 250 | |
| 251 | =head1 Diagnostics |
| 252 | |
| 253 | The following additions or changes have been made to diagnostic output, |
| 254 | including warnings and fatal error messages. For the complete list of |
| 255 | diagnostic messages, see L<perldiag>. |
| 256 | |
| 257 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
| 258 | include any changes in L<perldiag> that reconcile it to the C<C> code. |
| 259 | |
| 260 | [ Within each section, list entries as a =item entry ] |
| 261 | |
| 262 | =head2 New Diagnostics |
| 263 | |
| 264 | XXX Newly added diagnostic messages go here |
| 265 | |
| 266 | =over 4 |
| 267 | |
| 268 | =item * |
| 269 | |
| 270 | XXX |
| 271 | |
| 272 | =back |
| 273 | |
| 274 | =head2 Changes to Existing Diagnostics |
| 275 | |
| 276 | XXX Changes (i.e. rewording) of diagnostic messages go here |
| 277 | |
| 278 | =over 4 |
| 279 | |
| 280 | =item * |
| 281 | |
| 282 | XXX |
| 283 | |
| 284 | =back |
| 285 | |
| 286 | =head1 Utility Changes |
| 287 | |
| 288 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go |
| 289 | here. Most of these are built within the directories F<utils> and F<x2p>. |
| 290 | |
| 291 | [ List utility changes as a =head3 entry for each utility and =item |
| 292 | entries for each change |
| 293 | Use L<XXX> with program names to get proper documentation linking. ] |
| 294 | |
| 295 | =head3 L<XXX> |
| 296 | |
| 297 | =over 4 |
| 298 | |
| 299 | =item * |
| 300 | |
| 301 | XXX |
| 302 | |
| 303 | =back |
| 304 | |
| 305 | =head1 Configuration and Compilation |
| 306 | |
| 307 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
| 308 | go here. Any other changes to the Perl build process should be listed here. |
| 309 | However, any platform-specific changes should be listed in the |
| 310 | L</Platform Support> section, instead. |
| 311 | |
| 312 | [ List changes as a =item entry ]. |
| 313 | |
| 314 | =over 4 |
| 315 | |
| 316 | =item * |
| 317 | |
| 318 | Improve compatibility with C<C++> compilers. |
| 319 | |
| 320 | =back |
| 321 | |
| 322 | =head1 Testing |
| 323 | |
| 324 | XXX Any significant changes to the testing of a freshly built perl should be |
| 325 | listed here. Changes which create B<new> files in F<t/> go here as do any |
| 326 | large changes to the testing harness (e.g. when parallel testing was added). |
| 327 | Changes to existing files in F<t/> aren't worth summarising, although the bugs |
| 328 | that they represent may be covered elsewhere. |
| 329 | |
| 330 | [ List each test improvement as a =item entry ] |
| 331 | |
| 332 | =over 4 |
| 333 | |
| 334 | =item * |
| 335 | |
| 336 | F<t/op/print.t> has been added to test implicit printing of C<$_>. |
| 337 | |
| 338 | =item * |
| 339 | |
| 340 | F<t/io/errnosig.t> has been added to test for restoration of of C<$!> when |
| 341 | leaving signal handlers. |
| 342 | |
| 343 | =back |
| 344 | |
| 345 | =head1 Platform Support |
| 346 | |
| 347 | XXX Any changes to platform support should be listed in the sections below. |
| 348 | |
| 349 | [ Within the sections, list each platform as a =item entry with specific |
| 350 | changes as paragraphs below it. ] |
| 351 | |
| 352 | =head2 New Platforms |
| 353 | |
| 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. |
| 358 | |
| 359 | =over 4 |
| 360 | |
| 361 | =item XXX-some-platform |
| 362 | |
| 363 | XXX |
| 364 | |
| 365 | =back |
| 366 | |
| 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 | |
| 377 | =back |
| 378 | |
| 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. |
| 385 | |
| 386 | =over 4 |
| 387 | |
| 388 | =item Win32 |
| 389 | |
| 390 | =over 4 |
| 391 | |
| 392 | =item * |
| 393 | |
| 394 | Fixed a possible hang in F<t/op/readline.t>. |
| 395 | |
| 396 | =item * |
| 397 | |
| 398 | Fixed Makefile for SDK2003SP1 compilers. |
| 399 | |
| 400 | =back |
| 401 | |
| 402 | =back |
| 403 | |
| 404 | =head1 Internal Changes |
| 405 | |
| 406 | XXX Changes which affect the interface available to C<XS> code go here. |
| 407 | Other significant internal changes for future core maintainers should |
| 408 | be noted as well. |
| 409 | |
| 410 | [ List each test improvement as a =item entry ] |
| 411 | |
| 412 | =over 4 |
| 413 | |
| 414 | =item Removed C<PERL_POLLUTE> |
| 415 | |
| 416 | The option to define C<PERL_POLLUTE> to expose older 5.005 symbols for backwards |
| 417 | compatibility has been removed. It's use was always discouraged, and MakeMaker |
| 418 | contains a more specific escape hatch: |
| 419 | |
| 420 | perl Makefile.PL POLLUTE=1 |
| 421 | |
| 422 | This can be used for modules that have not been upgraded to 5.6 naming |
| 423 | conventions (and really should be completely obsolete by now). |
| 424 | |
| 425 | =item Make extending the peephole optimizer easier |
| 426 | |
| 427 | As of version 5.8, extension authors were allowed to replace perl's peephole |
| 428 | optimizer function. However, this was B<very> hard to do, as there was no way to |
| 429 | add new optimizations without having to copy large parts of perl's original |
| 430 | optimizer. This problem is now solved by a rework of the optimizer extension |
| 431 | API. See L<perlguts/"Compile pass 3: peephole optimization"> for details. |
| 432 | |
| 433 | =back |
| 434 | |
| 435 | =head1 Selected Bug Fixes |
| 436 | |
| 437 | XXX Important bug fixes in the core language are summarised here. |
| 438 | Bug fixes in files in F<ext/> and F<lib/> are best summarised in |
| 439 | L</Modules and Pragmata>. |
| 440 | |
| 441 | [ List each fix as a =item entry ] |
| 442 | |
| 443 | =over 4 |
| 444 | |
| 445 | =item * |
| 446 | |
| 447 | Fixed possible memory leak when using L<caller()|perlfunc/"caller EXPR"> to set |
| 448 | C<@DB::args>. |
| 449 | |
| 450 | =item * |
| 451 | |
| 452 | Several memory leaks when loading XS modules were fixed. |
| 453 | |
| 454 | =item * |
| 455 | |
| 456 | A panic in the regular expression optimizer has been fixed (RT#75762). |
| 457 | |
| 458 | =item * |
| 459 | |
| 460 | Assignments to lvalue subroutines now honor copy-on-write behavior again, which |
| 461 | has been broken since version 5.10.0 (RT#75656). |
| 462 | |
| 463 | =item * |
| 464 | |
| 465 | Assignments to glob copies now behave just like assignments to regular globs |
| 466 | (RT#1804). |
| 467 | |
| 468 | =item * |
| 469 | |
| 470 | Within signal handlers, C<$!> is now implicitly localized. |
| 471 | |
| 472 | =back |
| 473 | |
| 474 | =head1 Known Problems |
| 475 | |
| 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, unless |
| 478 | they were specific to a particular platform (see below). |
| 479 | |
| 480 | This is a list of some significant unfixed bugs, which are regressions |
| 481 | from either 5.XXX.XXX or 5.XXX.XXX. |
| 482 | |
| 483 | [ List each fix as a =item entry ] |
| 484 | |
| 485 | =over 4 |
| 486 | |
| 487 | =item * |
| 488 | |
| 489 | XXX |
| 490 | |
| 491 | =back |
| 492 | |
| 493 | =head1 Obituary |
| 494 | |
| 495 | XXX If any significant core contributor has died, we've added a short obituary |
| 496 | here. |
| 497 | |
| 498 | =head1 Acknowledgements |
| 499 | |
| 500 | XXX The list of people to thank goes here. |
| 501 | |
| 502 | =head1 Reporting Bugs |
| 503 | |
| 504 | If you find what you think is a bug, you might check the articles |
| 505 | recently posted to the comp.lang.perl.misc newsgroup and the perl |
| 506 | bug database at http://rt.perl.org/perlbug/ . There may also be |
| 507 | information at http://www.perl.org/ , the Perl Home Page. |
| 508 | |
| 509 | If you believe you have an unreported bug, please run the B<perlbug> |
| 510 | program included with your release. Be sure to trim your bug down |
| 511 | to a tiny but sufficient test case. Your bug report, along with the |
| 512 | output of C<perl -V>, will be sent off to perlbug@perl.org to be |
| 513 | analysed by the Perl porting team. |
| 514 | |
| 515 | If the bug you are reporting has security implications, which make it |
| 516 | inappropriate to send to a publicly archived mailing list, then please send |
| 517 | it to perl5-security-report@perl.org. This points to a closed subscription |
| 518 | unarchived mailing list, which includes all the core committers, who be able |
| 519 | to help assess the impact of issues, figure out a resolution, and help |
| 520 | co-ordinate the release of patches to mitigate or fix the problem across all |
| 521 | platforms on which Perl is supported. Please only use this address for |
| 522 | security issues in the Perl core, not for modules independently |
| 523 | distributed on CPAN. |
| 524 | |
| 525 | =head1 SEE ALSO |
| 526 | |
| 527 | The F<Changes> file for an explanation of how to view exhaustive details |
| 528 | on what changed. |
| 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 |