| 1 | =encoding utf8 |
| 2 | |
| 3 | =for comment |
| 4 | This has been completed up to a51ee39b. |
| 5 | |
| 6 | =head1 NAME |
| 7 | |
| 8 | [ this is a template for a new perldelta file. Any text flagged as |
| 9 | XXX needs to be processed before release. ] |
| 10 | |
| 11 | perldelta - what is new for perl v5.13.8 |
| 12 | |
| 13 | =head1 DESCRIPTION |
| 14 | |
| 15 | This document describes differences between the 5.13.8 release and |
| 16 | the 5.13.7 release. |
| 17 | |
| 18 | If you are upgrading from an earlier release such as 5.13.6, first read |
| 19 | L<perl5137delta>, which describes differences between 5.13.6 and |
| 20 | 5.13.7. |
| 21 | |
| 22 | =head1 Notice |
| 23 | |
| 24 | XXX Any important notices here |
| 25 | |
| 26 | =head1 Core Enhancements |
| 27 | |
| 28 | XXX New core language features go here. Summarise user-visible core language |
| 29 | enhancements. Particularly prominent performance optimisations could go |
| 30 | here, but most should go in the L</Performance Enhancements> section. |
| 31 | |
| 32 | [ List each enhancement as a =head2 entry ] |
| 33 | |
| 34 | =head2 C<-d:-foo> calls C<Devel::foo::unimport> |
| 35 | |
| 36 | The syntax C<-dI<B<:>foo>> was extended in 5.6.1 to make C<-dI<:fooB<=bar>>> |
| 37 | equivalent to C<-MDevel::foo=bar>, which expands |
| 38 | internally to C<use Devel::foo 'bar';>. |
| 39 | F<perl> now allows prefixing the module name with C<->, with the same |
| 40 | semantics as C<-M>, I<i.e.> |
| 41 | |
| 42 | =over 4 |
| 43 | |
| 44 | =item C<-d:-foo> |
| 45 | |
| 46 | Equivalent to C<-M-Devel::foo>, expands to |
| 47 | C<no Devel::foo;>, calls C<< Devel::foo->unimport() >> |
| 48 | if the method exists. |
| 49 | |
| 50 | =item C<-d:-foo=bar> |
| 51 | |
| 52 | Equivalent to C<-M-Devel::foo=bar>, expands to C<no Devel::foo 'bar';>, |
| 53 | calls C<< Devel::foo->unimport('bar') >> if the method exists. |
| 54 | |
| 55 | =back |
| 56 | |
| 57 | This is particularly useful to suppresses the default actions of a |
| 58 | C<Devel::*> module's C<import> method whilst still loading it for debugging. |
| 59 | |
| 60 | =head1 Security |
| 61 | |
| 62 | XXX Any security-related notices go here. In particular, any security |
| 63 | vulnerabilities closed should be noted here rather than in the |
| 64 | L</Selected Bug Fixes> section. |
| 65 | |
| 66 | [ List each security issue as a =head2 entry ] |
| 67 | |
| 68 | =head1 Incompatible Changes |
| 69 | |
| 70 | XXX For a release on a stable branch, this section aspires to be: |
| 71 | |
| 72 | There are no changes intentionally incompatible with 5.XXX.XXX. If any |
| 73 | exist, they are bugs and reports are welcome. |
| 74 | |
| 75 | [ List each incompatible change as a =head2 entry ] |
| 76 | |
| 77 | =head1 Deprecations |
| 78 | |
| 79 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
| 80 | In particular, deprecated modules should be listed here even if they are |
| 81 | listed as an updated module in the L</Modules and Pragmata> section. |
| 82 | |
| 83 | [ List each deprecation as a =head2 entry ] |
| 84 | |
| 85 | =head2 C<?PATTERN?> is deprecated |
| 86 | |
| 87 | C<?PATTERN?> (without the initial m) has been deprecated and now produces |
| 88 | a warning. |
| 89 | |
| 90 | =head2 C<sv_compile_2op> is now deprecated |
| 91 | |
| 92 | The C<sv_compile_2op> is now deprecated, and will be removed. Searches suggest |
| 93 | that nothing on CPAN is using it, so this should have zero impact. |
| 94 | |
| 95 | It attempted to provide an API to compile code down to an optree, but failed |
| 96 | to bind correctly to lexicals in the enclosing scope. It's not possible to |
| 97 | fix this problem within the constraints of its parameters and return value. |
| 98 | |
| 99 | =head1 Performance Enhancements |
| 100 | |
| 101 | XXX Changes which enhance performance without changing behaviour go here. There |
| 102 | may well be none in a stable release. |
| 103 | |
| 104 | [ List each enhancement as a =item entry ] |
| 105 | |
| 106 | =over 4 |
| 107 | |
| 108 | =item * |
| 109 | |
| 110 | XXX |
| 111 | |
| 112 | =back |
| 113 | |
| 114 | =head1 Modules and Pragmata |
| 115 | |
| 116 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
| 117 | go here. If Module::CoreList is updated, generate an initial draft of the |
| 118 | following sections using F<Porting/corelist-perldelta.pl>, which prints stub |
| 119 | entries to STDOUT. Results can be pasted in place of the '=head2' entries |
| 120 | below. A paragraph summary for important changes should then be added by hand. |
| 121 | In an ideal world, dual-life modules would have a F<Changes> file that could be |
| 122 | cribbed. |
| 123 | |
| 124 | [ Within each section, list entries as a =item entry ] |
| 125 | |
| 126 | =head2 New Modules and Pragmata |
| 127 | |
| 128 | =over 4 |
| 129 | |
| 130 | =item * |
| 131 | |
| 132 | XXX |
| 133 | |
| 134 | =back |
| 135 | |
| 136 | =head2 Updated Modules and Pragmata |
| 137 | |
| 138 | =over 4 |
| 139 | |
| 140 | =item * |
| 141 | |
| 142 | C<IPC::Cmd> has been upgraded from 0.64 to 0.66 |
| 143 | |
| 144 | Resolves an issue with splitting Win32 command lines |
| 145 | and documentation enhancements. |
| 146 | |
| 147 | =item * |
| 148 | |
| 149 | C<MIME::Base64> has been upgraded from 3.10 to 3.13 |
| 150 | |
| 151 | Now provides encode_base64url and decode_base64url functions to process |
| 152 | the base64 scheme for "URL applications". |
| 153 | |
| 154 | =item * |
| 155 | |
| 156 | C<Socket> has been upgraded from 1.91 to 1.92. |
| 157 | |
| 158 | It has several new functions for handling IPv6 addresses. |
| 159 | |
| 160 | =item * |
| 161 | |
| 162 | C<Unicode::Collate> has been upgraded from 0.67 to 0.68 |
| 163 | |
| 164 | =item * |
| 165 | |
| 166 | C<Unicode::UCD> has been upgraded from 0.29 to 0.30. |
| 167 | |
| 168 | =back |
| 169 | |
| 170 | =head2 Removed Modules and Pragmata |
| 171 | |
| 172 | =over 4 |
| 173 | |
| 174 | =item * |
| 175 | |
| 176 | XXX |
| 177 | |
| 178 | =back |
| 179 | |
| 180 | =head1 Documentation |
| 181 | |
| 182 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
| 183 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. |
| 184 | |
| 185 | =head2 New Documentation |
| 186 | |
| 187 | XXX Changes which create B<new> files in F<pod/> go here. |
| 188 | |
| 189 | =head3 L<XXX> |
| 190 | |
| 191 | XXX Description of the purpose of the new file here |
| 192 | |
| 193 | =head2 Changes to Existing Documentation |
| 194 | |
| 195 | XXX Changes which significantly change existing files in F<pod/> go here. |
| 196 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> |
| 197 | section. |
| 198 | |
| 199 | =head3 L<XXX> |
| 200 | |
| 201 | =over 4 |
| 202 | |
| 203 | =item * |
| 204 | |
| 205 | XXX Description of the change here |
| 206 | |
| 207 | =back |
| 208 | |
| 209 | =head1 Diagnostics |
| 210 | |
| 211 | The following additions or changes have been made to diagnostic output, |
| 212 | including warnings and fatal error messages. For the complete list of |
| 213 | diagnostic messages, see L<perldiag>. |
| 214 | |
| 215 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
| 216 | include any changes in L<perldiag> that reconcile it to the C<C> code. |
| 217 | |
| 218 | [ Within each section, list entries as a =item entry ] |
| 219 | |
| 220 | =head2 New Diagnostics |
| 221 | |
| 222 | XXX Newly added diagnostic messages go here |
| 223 | |
| 224 | =over 4 |
| 225 | |
| 226 | =item * |
| 227 | |
| 228 | XXX |
| 229 | |
| 230 | =back |
| 231 | |
| 232 | =head2 Changes to Existing Diagnostics |
| 233 | |
| 234 | XXX Changes (i.e. rewording) of diagnostic messages go here |
| 235 | |
| 236 | =over 4 |
| 237 | |
| 238 | =item * |
| 239 | |
| 240 | XXX |
| 241 | |
| 242 | =back |
| 243 | |
| 244 | =head1 Utility Changes |
| 245 | |
| 246 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go |
| 247 | here. Most of these are built within the directories F<utils> and F<x2p>. |
| 248 | |
| 249 | [ List utility changes as a =head3 entry for each utility and =item |
| 250 | entries for each change |
| 251 | Use L<XXX> with program names to get proper documentation linking. ] |
| 252 | |
| 253 | =head3 L<XXX> |
| 254 | |
| 255 | =over 4 |
| 256 | |
| 257 | =item * |
| 258 | |
| 259 | XXX |
| 260 | |
| 261 | =back |
| 262 | |
| 263 | =head1 Configuration and Compilation |
| 264 | |
| 265 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
| 266 | go here. Any other changes to the Perl build process should be listed here. |
| 267 | However, any platform-specific changes should be listed in the |
| 268 | L</Platform Support> section, instead. |
| 269 | |
| 270 | [ List changes as a =item entry ]. |
| 271 | |
| 272 | =over 4 |
| 273 | |
| 274 | =item * |
| 275 | |
| 276 | XXX |
| 277 | |
| 278 | =back |
| 279 | |
| 280 | =head1 Testing |
| 281 | |
| 282 | XXX Any significant changes to the testing of a freshly built perl should be |
| 283 | listed here. Changes which create B<new> files in F<t/> go here as do any |
| 284 | large changes to the testing harness (e.g. when parallel testing was added). |
| 285 | Changes to existing files in F<t/> aren't worth summarising, although the bugs |
| 286 | that they represent may be covered elsewhere. |
| 287 | |
| 288 | [ List each test improvement as a =item entry ] |
| 289 | |
| 290 | =over 4 |
| 291 | |
| 292 | =item * |
| 293 | |
| 294 | XXX |
| 295 | |
| 296 | =back |
| 297 | |
| 298 | =head1 Platform Support |
| 299 | |
| 300 | XXX Any changes to platform support should be listed in the sections below. |
| 301 | |
| 302 | [ Within the sections, list each platform as a =item entry with specific |
| 303 | changes as paragraphs below it. ] |
| 304 | |
| 305 | =head2 New Platforms |
| 306 | |
| 307 | XXX List any platforms that this version of perl compiles on, that previous |
| 308 | versions did not. These will either be enabled by new files in the F<hints/> |
| 309 | directories, or new subdirectories and F<README> files at the top level of the |
| 310 | source tree. |
| 311 | |
| 312 | =over 4 |
| 313 | |
| 314 | =item XXX-some-platform |
| 315 | |
| 316 | XXX |
| 317 | |
| 318 | =back |
| 319 | |
| 320 | =head2 Discontinued Platforms |
| 321 | |
| 322 | XXX List any platforms that this version of perl no longer compiles on. |
| 323 | |
| 324 | =over 4 |
| 325 | |
| 326 | =item XXX-some-platform |
| 327 | |
| 328 | XXX |
| 329 | |
| 330 | =back |
| 331 | |
| 332 | =head2 Platform-Specific Notes |
| 333 | |
| 334 | XXX List any changes for specific platforms. This could include configuration |
| 335 | and compilation changes or changes in portability/compatibility. However, |
| 336 | changes within modules for platforms should generally be listed in the |
| 337 | L</Modules and Pragmata> section. |
| 338 | |
| 339 | =over 4 |
| 340 | |
| 341 | =item XXX-some-platform |
| 342 | |
| 343 | XXX |
| 344 | |
| 345 | =back |
| 346 | |
| 347 | =head1 Internal Changes |
| 348 | |
| 349 | XXX Changes which affect the interface available to C<XS> code go here. |
| 350 | Other significant internal changes for future core maintainers should |
| 351 | be noted as well. |
| 352 | |
| 353 | [ List each test improvement as a =item entry ] |
| 354 | |
| 355 | =over 4 |
| 356 | |
| 357 | =item * |
| 358 | |
| 359 | XXX |
| 360 | |
| 361 | =back |
| 362 | |
| 363 | =head1 Selected Bug Fixes |
| 364 | |
| 365 | XXX Important bug fixes in the core language are summarised here. |
| 366 | Bug fixes in files in F<ext/> and F<lib/> are best summarised in |
| 367 | L</Modules and Pragmata>. |
| 368 | |
| 369 | [ List each fix as a =item entry ] |
| 370 | |
| 371 | =over 4 |
| 372 | |
| 373 | =item * |
| 374 | |
| 375 | C<BEGIN {require 5.12.0}> now behaves as documented, rather than behaving |
| 376 | identically to C<use 5.12.0;>. Previously, C<require> in a C<BEGIN> block |
| 377 | was erroneously executing the C<use feature ':5.12.0'> and |
| 378 | C<use strict; use warnings;> behaviour, which only C<use> was documented to |
| 379 | provide |
| 380 | L<[perl #69050]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=69050>. |
| 381 | |
| 382 | =item * |
| 383 | |
| 384 | C<use 5.42> |
| 385 | L<[perl #69050]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=69050>, |
| 386 | C<use 6> and C<no 5> no longer leak memory. |
| 387 | |
| 388 | =item * |
| 389 | |
| 390 | C<eval "BEGIN{die}"> no longer leaks memory on non-threaded builds. |
| 391 | |
| 392 | =item * |
| 393 | |
| 394 | PerlIO no longer crashes when called recursively, e.g., from a signal |
| 395 | handler. Now it just leaks memory |
| 396 | L<[perl #75556]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=75556>. |
| 397 | |
| 398 | =item * |
| 399 | |
| 400 | Defining a constant with the same name as one of perl's special blocks |
| 401 | (e.g., INIT) stopped working in 5.12.0, but has now been fixed |
| 402 | L<[perl #78634]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78634>. |
| 403 | |
| 404 | =back |
| 405 | |
| 406 | =head1 Known Problems |
| 407 | |
| 408 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
| 409 | tests that had to be C<TODO>ed for the release would be noted here, unless |
| 410 | they were specific to a particular platform (see below). |
| 411 | |
| 412 | This is a list of some significant unfixed bugs, which are regressions |
| 413 | from either 5.XXX.XXX or 5.XXX.XXX. |
| 414 | |
| 415 | [ List each fix as a =item entry ] |
| 416 | |
| 417 | =over 4 |
| 418 | |
| 419 | =item * |
| 420 | |
| 421 | A number of bugs with regular expression bracketed character classes |
| 422 | have been fixed, mostly having to do with matching characters in the |
| 423 | non-ASCII Latin-1 range. |
| 424 | |
| 425 | =back |
| 426 | |
| 427 | =head1 Obituary |
| 428 | |
| 429 | XXX If any significant core contributor has died, we've added a short obituary |
| 430 | here. |
| 431 | |
| 432 | =head1 Acknowledgements |
| 433 | |
| 434 | XXX The list of people to thank goes here. |
| 435 | |
| 436 | =head1 Reporting Bugs |
| 437 | |
| 438 | If you find what you think is a bug, you might check the articles |
| 439 | recently posted to the comp.lang.perl.misc newsgroup and the perl |
| 440 | bug database at http://rt.perl.org/perlbug/ . There may also be |
| 441 | information at http://www.perl.org/ , the Perl Home Page. |
| 442 | |
| 443 | If you believe you have an unreported bug, please run the L<perlbug> |
| 444 | program included with your release. Be sure to trim your bug down |
| 445 | to a tiny but sufficient test case. Your bug report, along with the |
| 446 | output of C<perl -V>, will be sent off to perlbug@perl.org to be |
| 447 | analysed by the Perl porting team. |
| 448 | |
| 449 | If the bug you are reporting has security implications, which make it |
| 450 | inappropriate to send to a publicly archived mailing list, then please send |
| 451 | it to perl5-security-report@perl.org. This points to a closed subscription |
| 452 | unarchived mailing list, which includes all the core committers, who be able |
| 453 | to help assess the impact of issues, figure out a resolution, and help |
| 454 | co-ordinate the release of patches to mitigate or fix the problem across all |
| 455 | platforms on which Perl is supported. Please only use this address for |
| 456 | security issues in the Perl core, not for modules independently |
| 457 | distributed on CPAN. |
| 458 | |
| 459 | =head1 SEE ALSO |
| 460 | |
| 461 | The F<Changes> file for an explanation of how to view exhaustive details |
| 462 | on what changed. |
| 463 | |
| 464 | The F<INSTALL> file for how to build Perl. |
| 465 | |
| 466 | The F<README> file for general stuff. |
| 467 | |
| 468 | The F<Artistic> and F<Copying> files for copyright information. |
| 469 | |
| 470 | =cut |