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3a5c9134 CBW |
1 | =encoding utf8 |
2 | ||
59773fc7 | 3 | =for comment |
3ad6135d | 4 | This has been completed up to dbe92b04c, except for 1b9f127-fad448f, which |
f295f417 | 5 | Karl Williamson says he will do. |
59773fc7 | 6 | |
3a5c9134 CBW |
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 v5.13.8 | |
13 | ||
14 | =head1 DESCRIPTION | |
15 | ||
16 | This document describes differences between the 5.13.8 release and | |
17 | the 5.13.7 release. | |
18 | ||
dbbe2d83 | 19 | If you are upgrading from an earlier release such as 5.13.6, first read |
3a5c9134 CBW |
20 | L<perl5137delta>, which describes differences between 5.13.6 and |
21 | 5.13.7. | |
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 | ||
b19934fb NC |
35 | =head2 C<-d:-foo> calls C<Devel::foo::unimport> |
36 | ||
37 | The syntax C<-dI<B<:>foo>> was extended in 5.6.1 to make C<-dI<:fooB<=bar>>> | |
6a8c8694 FC |
38 | equivalent to C<-MDevel::foo=bar>, which expands |
39 | internally to C<use Devel::foo 'bar';>. | |
b19934fb NC |
40 | F<perl> now allows prefixing the module name with C<->, with the same |
41 | semantics as C<-M>, I<i.e.> | |
42 | ||
43 | =over 4 | |
44 | ||
45 | =item C<-d:-foo> | |
46 | ||
6a8c8694 FC |
47 | Equivalent to C<-M-Devel::foo>, expands to |
48 | C<no Devel::foo;>, calls C<< Devel::foo->unimport() >> | |
b19934fb NC |
49 | if the method exists. |
50 | ||
51 | =item C<-d:-foo=bar> | |
52 | ||
6a8c8694 FC |
53 | Equivalent to C<-M-Devel::foo=bar>, expands to C<no Devel::foo 'bar';>, |
54 | calls C<< Devel::foo->unimport('bar') >> if the method exists. | |
b19934fb NC |
55 | |
56 | =back | |
57 | ||
58 | This is particularly useful to suppresses the default actions of a | |
59 | C<Devel::*> module's C<import> method whilst still loading it for debugging. | |
60 | ||
3a5c9134 CBW |
61 | =head1 Security |
62 | ||
63 | XXX Any security-related notices go here. In particular, any security | |
64 | vulnerabilities closed should be noted here rather than in the | |
65 | L</Selected Bug Fixes> section. | |
66 | ||
67 | [ List each security issue as a =head2 entry ] | |
68 | ||
69 | =head1 Incompatible Changes | |
70 | ||
2dc78664 | 71 | =head2 Attempting to use C<:=> as an empty attribute list is now a syntax error |
3a5c9134 | 72 | |
2dc78664 NC |
73 | Previously C<my $pi := 4;> was exactly equivalent to C<my $pi : = 4;>, |
74 | with the C<:> being treated as the start of an attribute list, ending before | |
75 | the C<=>. The use of C<:=> to mean C<: => was deprecated in 5.12.0, and is now | |
76 | a syntax error. This will allow the future use of C<:=> as a new token. | |
3a5c9134 | 77 | |
2dc78664 NC |
78 | We find no Perl 5 code on CPAN using this construction, outside the core's |
79 | tests for it, so we believe that this change will have very little impact on | |
80 | real-world codebases. | |
81 | ||
82 | If it is absolutely necessary to have empty attribute lists (for example, | |
baed7a72 NC |
83 | because of a code generator) then avoid the error by adding a space before |
84 | the C<=>. | |
3a5c9134 CBW |
85 | |
86 | =head1 Deprecations | |
87 | ||
88 | XXX Any deprecated features, syntax, modules etc. should be listed here. | |
89 | In particular, deprecated modules should be listed here even if they are | |
90 | listed as an updated module in the L</Modules and Pragmata> section. | |
91 | ||
92 | [ List each deprecation as a =head2 entry ] | |
93 | ||
59773fc7 FC |
94 | =head2 C<?PATTERN?> is deprecated |
95 | ||
96 | C<?PATTERN?> (without the initial m) has been deprecated and now produces | |
97 | a warning. | |
98 | ||
d59a8b3e NC |
99 | =head2 C<sv_compile_2op> is now deprecated |
100 | ||
101 | The C<sv_compile_2op> is now deprecated, and will be removed. Searches suggest | |
102 | that nothing on CPAN is using it, so this should have zero impact. | |
103 | ||
104 | It attempted to provide an API to compile code down to an optree, but failed | |
105 | to bind correctly to lexicals in the enclosing scope. It's not possible to | |
106 | fix this problem within the constraints of its parameters and return value. | |
107 | ||
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108 | =head1 Performance Enhancements |
109 | ||
110 | XXX Changes which enhance performance without changing behaviour go here. There | |
111 | may well be none in a stable release. | |
112 | ||
113 | [ List each enhancement as a =item entry ] | |
114 | ||
115 | =over 4 | |
116 | ||
117 | =item * | |
118 | ||
119 | XXX | |
120 | ||
121 | =back | |
122 | ||
123 | =head1 Modules and Pragmata | |
124 | ||
125 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> | |
126 | go here. If Module::CoreList is updated, generate an initial draft of the | |
127 | following sections using F<Porting/corelist-perldelta.pl>, which prints stub | |
128 | entries to STDOUT. Results can be pasted in place of the '=head2' entries | |
129 | below. A paragraph summary for important changes should then be added by hand. | |
130 | In an ideal world, dual-life modules would have a F<Changes> file that could be | |
131 | cribbed. | |
132 | ||
133 | [ Within each section, list entries as a =item entry ] | |
134 | ||
135 | =head2 New Modules and Pragmata | |
136 | ||
137 | =over 4 | |
138 | ||
139 | =item * | |
140 | ||
141 | XXX | |
142 | ||
143 | =back | |
144 | ||
145 | =head2 Updated Modules and Pragmata | |
146 | ||
147 | =over 4 | |
148 | ||
149 | =item * | |
150 | ||
39b09a1b CBW |
151 | C<IPC::Cmd> has been upgraded from 0.64 to 0.66 |
152 | ||
153 | Resolves an issue with splitting Win32 command lines | |
154 | and documentation enhancements. | |
155 | ||
156 | =item * | |
157 | ||
28502098 FR |
158 | C<Memoize> has been upgraded from version 1.01_03 to 1.02. |
159 | ||
160 | =item * | |
161 | ||
37fa6334 | 162 | C<MIME::Base64> has been upgraded from 3.10 to 3.13 |
2456140e CBW |
163 | |
164 | Now provides encode_base64url and decode_base64url functions to process | |
165 | the base64 scheme for "URL applications". | |
166 | ||
167 | =item * | |
168 | ||
2638c0ff FC |
169 | C<overload> has been upgraded from 1.11 to 1.12. |
170 | ||
171 | =item * | |
172 | ||
173 | C<PerlIO::scalar> has been upgraded from 0.10 to 0.11. | |
174 | ||
175 | A C<read> after a C<seek> beyond the end of the string no longer thinks it | |
176 | has data to read | |
177 | L<[perl #78716]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78716>. | |
178 | ||
179 | =item * | |
180 | ||
f295f417 FC |
181 | C<re> has been upgraded from 0.14 to 0.15. |
182 | ||
183 | =item * | |
184 | ||
5ebfb99c | 185 | C<Socket> has been upgraded from 1.91 to 1.92. |
b373eab8 FC |
186 | |
187 | It has several new functions for handling IPv6 addresses. | |
188 | ||
189 | =item * | |
190 | ||
d4238815 FC |
191 | C<Time::HiRes> has been upgraded from 1.9721 to 1.9721_01. |
192 | ||
193 | =item * | |
194 | ||
68adb2b0 CBW |
195 | C<Unicode::Collate> has been upgraded from 0.67 to 0.68 |
196 | ||
197 | =item * | |
198 | ||
59773fc7 | 199 | C<Unicode::UCD> has been upgraded from 0.29 to 0.30. |
3a5c9134 | 200 | |
c2e0289e FC |
201 | =item * |
202 | ||
203 | C<version> has been upgraded from 0.82 to 0.86. | |
204 | ||
3a5c9134 CBW |
205 | =back |
206 | ||
207 | =head2 Removed Modules and Pragmata | |
208 | ||
209 | =over 4 | |
210 | ||
211 | =item * | |
212 | ||
213 | XXX | |
214 | ||
215 | =back | |
216 | ||
217 | =head1 Documentation | |
218 | ||
219 | XXX Changes to files in F<pod/> go here. Consider grouping entries by | |
220 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
221 | ||
222 | =head2 New Documentation | |
223 | ||
224 | XXX Changes which create B<new> files in F<pod/> go here. | |
225 | ||
226 | =head3 L<XXX> | |
227 | ||
228 | XXX Description of the purpose of the new file here | |
229 | ||
230 | =head2 Changes to Existing Documentation | |
231 | ||
232 | XXX Changes which significantly change existing files in F<pod/> go here. | |
233 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
234 | section. | |
235 | ||
236 | =head3 L<XXX> | |
237 | ||
238 | =over 4 | |
239 | ||
240 | =item * | |
241 | ||
242 | XXX Description of the change here | |
243 | ||
244 | =back | |
245 | ||
246 | =head1 Diagnostics | |
247 | ||
248 | The following additions or changes have been made to diagnostic output, | |
249 | including warnings and fatal error messages. For the complete list of | |
250 | diagnostic messages, see L<perldiag>. | |
251 | ||
252 | XXX New or changed warnings emitted by the core's C<C> code go here. Also | |
253 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
254 | ||
255 | [ Within each section, list entries as a =item entry ] | |
256 | ||
257 | =head2 New Diagnostics | |
258 | ||
259 | XXX Newly added diagnostic messages go here | |
260 | ||
261 | =over 4 | |
262 | ||
263 | =item * | |
264 | ||
265 | XXX | |
266 | ||
267 | =back | |
268 | ||
269 | =head2 Changes to Existing Diagnostics | |
270 | ||
271 | XXX Changes (i.e. rewording) of diagnostic messages go here | |
272 | ||
273 | =over 4 | |
274 | ||
275 | =item * | |
276 | ||
277 | XXX | |
278 | ||
279 | =back | |
280 | ||
281 | =head1 Utility Changes | |
282 | ||
283 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go | |
284 | here. Most of these are built within the directories F<utils> and F<x2p>. | |
285 | ||
286 | [ List utility changes as a =head3 entry for each utility and =item | |
287 | entries for each change | |
288 | Use L<XXX> with program names to get proper documentation linking. ] | |
289 | ||
290 | =head3 L<XXX> | |
291 | ||
292 | =over 4 | |
293 | ||
294 | =item * | |
295 | ||
296 | XXX | |
297 | ||
298 | =back | |
299 | ||
300 | =head1 Configuration and Compilation | |
301 | ||
302 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools | |
303 | go here. Any other changes to the Perl build process should be listed here. | |
304 | However, any platform-specific changes should be listed in the | |
305 | L</Platform Support> section, instead. | |
306 | ||
307 | [ List changes as a =item entry ]. | |
308 | ||
309 | =over 4 | |
310 | ||
311 | =item * | |
312 | ||
313 | XXX | |
314 | ||
315 | =back | |
316 | ||
317 | =head1 Testing | |
318 | ||
319 | XXX Any significant changes to the testing of a freshly built perl should be | |
320 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
321 | large changes to the testing harness (e.g. when parallel testing was added). | |
322 | Changes to existing files in F<t/> aren't worth summarising, although the bugs | |
323 | that they represent may be covered elsewhere. | |
324 | ||
325 | [ List each test improvement as a =item entry ] | |
326 | ||
327 | =over 4 | |
328 | ||
329 | =item * | |
330 | ||
331 | XXX | |
332 | ||
333 | =back | |
334 | ||
335 | =head1 Platform Support | |
336 | ||
337 | XXX Any changes to platform support should be listed in the sections below. | |
338 | ||
339 | [ Within the sections, list each platform as a =item entry with specific | |
340 | changes as paragraphs below it. ] | |
341 | ||
342 | =head2 New Platforms | |
343 | ||
344 | XXX List any platforms that this version of perl compiles on, that previous | |
345 | versions did not. These will either be enabled by new files in the F<hints/> | |
346 | directories, or new subdirectories and F<README> files at the top level of the | |
347 | source tree. | |
348 | ||
349 | =over 4 | |
350 | ||
351 | =item XXX-some-platform | |
352 | ||
353 | XXX | |
354 | ||
355 | =back | |
356 | ||
357 | =head2 Discontinued Platforms | |
358 | ||
359 | XXX List any platforms that this version of perl no longer compiles on. | |
360 | ||
361 | =over 4 | |
362 | ||
363 | =item XXX-some-platform | |
364 | ||
365 | XXX | |
366 | ||
367 | =back | |
368 | ||
369 | =head2 Platform-Specific Notes | |
370 | ||
371 | XXX List any changes for specific platforms. This could include configuration | |
372 | and compilation changes or changes in portability/compatibility. However, | |
373 | changes within modules for platforms should generally be listed in the | |
374 | L</Modules and Pragmata> section. | |
375 | ||
376 | =over 4 | |
377 | ||
378 | =item XXX-some-platform | |
379 | ||
380 | XXX | |
381 | ||
382 | =back | |
383 | ||
384 | =head1 Internal Changes | |
385 | ||
386 | XXX Changes which affect the interface available to C<XS> code go here. | |
387 | Other significant internal changes for future core maintainers should | |
388 | be noted as well. | |
389 | ||
390 | [ List each test improvement as a =item entry ] | |
391 | ||
392 | =over 4 | |
393 | ||
394 | =item * | |
395 | ||
396 | XXX | |
397 | ||
398 | =back | |
399 | ||
400 | =head1 Selected Bug Fixes | |
401 | ||
402 | XXX Important bug fixes in the core language are summarised here. | |
403 | Bug fixes in files in F<ext/> and F<lib/> are best summarised in | |
404 | L</Modules and Pragmata>. | |
405 | ||
406 | [ List each fix as a =item entry ] | |
407 | ||
408 | =over 4 | |
409 | ||
410 | =item * | |
411 | ||
88e9444c NC |
412 | C<BEGIN {require 5.12.0}> now behaves as documented, rather than behaving |
413 | identically to C<use 5.12.0;>. Previously, C<require> in a C<BEGIN> block | |
414 | was erroneously executing the C<use feature ':5.12.0'> and | |
415 | C<use strict; use warnings;> behaviour, which only C<use> was documented to | |
b373eab8 FC |
416 | provide |
417 | L<[perl #69050]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=69050>. | |
418 | ||
419 | =item * | |
420 | ||
421 | C<use 5.42> | |
422 | L<[perl #69050]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=69050>, | |
423 | C<use 6> and C<no 5> no longer leak memory. | |
424 | ||
425 | =item * | |
426 | ||
427 | C<eval "BEGIN{die}"> no longer leaks memory on non-threaded builds. | |
3a5c9134 | 428 | |
1428a560 FC |
429 | =item * |
430 | ||
431 | PerlIO no longer crashes when called recursively, e.g., from a signal | |
432 | handler. Now it just leaks memory | |
433 | L<[perl #75556]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=75556>. | |
434 | ||
11cd2234 FC |
435 | =item * |
436 | ||
437 | Defining a constant with the same name as one of perl's special blocks | |
438 | (e.g., INIT) stopped working in 5.12.0, but has now been fixed | |
439 | L<[perl #78634]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78634>. | |
440 | ||
e3ef43a5 FC |
441 | =item * |
442 | ||
443 | A reference to a literal value used as a hash key (C<$hash{\"foo"}>) used | |
444 | to be stringified, even if the hash was tied | |
445 | L<[perl #79178]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=79178>. | |
446 | ||
3ad6135d FC |
447 | =item * |
448 | ||
449 | A number of bugs with regular expression bracketed character classes | |
450 | have been fixed, mostly having to do with matching characters in the | |
451 | non-ASCII Latin-1 range. | |
452 | ||
453 | =item * | |
454 | ||
455 | A closure containing an C<if> statement followed by a constant or variable | |
456 | is no longer treated as a constant | |
457 | L<[perl #63540]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=63540>. | |
458 | ||
3a5c9134 CBW |
459 | =back |
460 | ||
461 | =head1 Known Problems | |
462 | ||
463 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any | |
464 | tests that had to be C<TODO>ed for the release would be noted here, unless | |
465 | they were specific to a particular platform (see below). | |
466 | ||
467 | This is a list of some significant unfixed bugs, which are regressions | |
468 | from either 5.XXX.XXX or 5.XXX.XXX. | |
469 | ||
470 | [ List each fix as a =item entry ] | |
471 | ||
472 | =over 4 | |
473 | ||
474 | =item * | |
475 | ||
3ad6135d | 476 | XXX |
3a5c9134 CBW |
477 | |
478 | =back | |
479 | ||
480 | =head1 Obituary | |
481 | ||
482 | XXX If any significant core contributor has died, we've added a short obituary | |
483 | here. | |
484 | ||
485 | =head1 Acknowledgements | |
486 | ||
487 | XXX The list of people to thank goes here. | |
488 | ||
489 | =head1 Reporting Bugs | |
490 | ||
491 | If you find what you think is a bug, you might check the articles | |
492 | recently posted to the comp.lang.perl.misc newsgroup and the perl | |
493 | bug database at http://rt.perl.org/perlbug/ . There may also be | |
494 | information at http://www.perl.org/ , the Perl Home Page. | |
495 | ||
496 | If you believe you have an unreported bug, please run the L<perlbug> | |
497 | program included with your release. Be sure to trim your bug down | |
498 | to a tiny but sufficient test case. Your bug report, along with the | |
499 | output of C<perl -V>, will be sent off to perlbug@perl.org to be | |
500 | analysed by the Perl porting team. | |
501 | ||
502 | If the bug you are reporting has security implications, which make it | |
503 | inappropriate to send to a publicly archived mailing list, then please send | |
504 | it to perl5-security-report@perl.org. This points to a closed subscription | |
505 | unarchived mailing list, which includes all the core committers, who be able | |
506 | to help assess the impact of issues, figure out a resolution, and help | |
507 | co-ordinate the release of patches to mitigate or fix the problem across all | |
508 | platforms on which Perl is supported. Please only use this address for | |
509 | security issues in the Perl core, not for modules independently | |
510 | distributed on CPAN. | |
511 | ||
512 | =head1 SEE ALSO | |
513 | ||
514 | The F<Changes> file for an explanation of how to view exhaustive details | |
515 | on what changed. | |
516 | ||
517 | The F<INSTALL> file for how to build Perl. | |
518 | ||
519 | The F<README> file for general stuff. | |
520 | ||
521 | The F<Artistic> and F<Copying> files for copyright information. | |
522 | ||
523 | =cut |