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44691e6f AB |
1 | =encoding utf8 |
2 | ||
3 | =head1 NAME | |
4 | ||
19718730 | 5 | perldelta - what is new for perl v5.17.9 |
e128ab2c | 6 | |
4eabcf70 | 7 | =head1 DESCRIPTION |
6db9054f | 8 | |
19718730 | 9 | This document describes differences between the 5.17.8 release and the 5.17.9 |
e08634c5 | 10 | release. |
6db9054f | 11 | |
19718730 AC |
12 | If you are upgrading from an earlier release such as 5.17.7, first read |
13 | L<perl5178delta>, which describes differences between 5.17.7 and 5.17.8. | |
14 | ||
6253ee75 | 15 | =head1 Core Enhancements |
dd271d7a | 16 | |
b5864679 KW |
17 | =head2 Interpolations now Accepted in Regular Expression Set Operations |
18 | ||
19 | Perl v5.17.8 introduced L<regular expression set operations|perlre/(?[ ])>. | |
20 | They have now been expanded to allow the interpolation of a | |
21 | previously-compiled set into a bigger set, like this: | |
22 | ||
ea5a2f13 | 23 | my $thai_or_lao = qr/\p{Thai} + \p{Lao}/; |
b5864679 KW |
24 | ... |
25 | qr/(?[ \p{Digit} & $thai_or_lao ])/; | |
26 | ||
19718730 AC |
27 | =head1 Incompatible Changes |
28 | ||
888a67f6 KF |
29 | =head2 C<$ENV{foo} = undef> no longer deletes value from environ |
30 | ||
31 | 5.17.3 Introduced a change where assiging C<undef> to an C<%ENV> key was equivalent | |
32 | to C<delete $ENV{foo}>. | |
33 | ||
34 | This release reverts that change. | |
35 | ||
0e55f0d7 | 36 | =head1 Deprecations |
3ef6ec90 | 37 | |
4055dbce RS |
38 | The deprecation of lexical C<$_> in 5.17.7 has been commuted. The feature |
39 | is now marked experimental. | |
d1e59372 | 40 | |
62c60a36 CBW |
41 | =head2 Deprecated pragma |
42 | ||
43 | =over | |
44 | ||
45 | =item L<encoding> | |
46 | ||
47 | This module is deprecated under perl 5.18. It uses a mechanism provided by | |
48 | perl that is deprecated under 5.18 and higher, and may be removed in a | |
49 | future version. | |
50 | ||
51 | =back | |
52 | ||
3f01b192 CBW |
53 | =head2 Deprecated Modules |
54 | ||
55 | The following modules will be removed from the core distribution in a | |
56 | future release, and should be installed from CPAN instead. Distributions | |
57 | on CPAN which require these should add them to their prerequisites. The | |
58 | core versions of these modules C<warnings> will issue a deprecation warning. | |
59 | ||
60 | You can silence these deprecation warnings by installing the modules | |
61 | in question from CPAN. | |
62 | ||
63 | =over | |
64 | ||
65 | =item L<Archive::Extract> | |
66 | ||
67 | =item L<B::Lint> | |
68 | ||
69 | =item L<B::Lint::Debug> | |
70 | ||
71 | =item L<CPANPLUS> | |
72 | ||
73 | =item L<CPANPLUS::Backend> | |
74 | ||
75 | =item L<CPANPLUS::Backend::RV> | |
76 | ||
77 | =item L<CPANPLUS::Config> | |
78 | ||
79 | =item L<CPANPLUS::Config::HomeEnv> | |
80 | ||
81 | =item L<CPANPLUS::Configure> | |
82 | ||
9150e781 | 83 | =item C<CPANPLUS::Configure::Setup> |
3f01b192 CBW |
84 | |
85 | =item L<CPANPLUS::Dist> | |
86 | ||
87 | =item L<CPANPLUS::Dist::Autobundle> | |
88 | ||
89 | =item L<CPANPLUS::Dist::Base> | |
90 | ||
91 | =item L<CPANPLUS::Dist::Build> | |
92 | ||
93 | =item L<CPANPLUS::Dist::Build::Constants> | |
94 | ||
95 | =item L<CPANPLUS::Dist::MM> | |
96 | ||
97 | =item L<CPANPLUS::Dist::Sample> | |
98 | ||
99 | =item L<CPANPLUS::Error> | |
100 | ||
101 | =item L<CPANPLUS::Internals> | |
102 | ||
9150e781 | 103 | =item C<CPANPLUS::Internals::Constants> |
3f01b192 | 104 | |
9150e781 | 105 | =item C<CPANPLUS::Internals::Constants::Report> |
3f01b192 CBW |
106 | |
107 | =item L<CPANPLUS::Internals::Extract> | |
108 | ||
109 | =item L<CPANPLUS::Internals::Fetch> | |
110 | ||
111 | =item L<CPANPLUS::Internals::Report> | |
112 | ||
113 | =item L<CPANPLUS::Internals::Search> | |
114 | ||
115 | =item L<CPANPLUS::Internals::Source> | |
116 | ||
117 | =item L<CPANPLUS::Internals::Source::Memory> | |
118 | ||
119 | =item L<CPANPLUS::Internals::Source::SQLite> | |
120 | ||
9150e781 | 121 | =item C<CPANPLUS::Internals::Source::SQLite::Tie> |
3f01b192 CBW |
122 | |
123 | =item L<CPANPLUS::Internals::Utils> | |
124 | ||
9150e781 | 125 | =item C<CPANPLUS::Internals::Utils::Autoflush> |
3f01b192 CBW |
126 | |
127 | =item L<CPANPLUS::Module> | |
128 | ||
129 | =item L<CPANPLUS::Module::Author> | |
130 | ||
131 | =item L<CPANPLUS::Module::Author::Fake> | |
132 | ||
133 | =item L<CPANPLUS::Module::Checksums> | |
134 | ||
135 | =item L<CPANPLUS::Module::Fake> | |
136 | ||
9150e781 | 137 | =item C<CPANPLUS::Module::Signature> |
3f01b192 CBW |
138 | |
139 | =item L<CPANPLUS::Selfupdate> | |
140 | ||
141 | =item L<CPANPLUS::Shell> | |
142 | ||
143 | =item L<CPANPLUS::Shell::Classic> | |
144 | ||
145 | =item L<CPANPLUS::Shell::Default> | |
146 | ||
147 | =item L<CPANPLUS::Shell::Default::Plugins::CustomSource> | |
148 | ||
149 | =item L<CPANPLUS::Shell::Default::Plugins::Remote> | |
150 | ||
151 | =item L<CPANPLUS::Shell::Default::Plugins::Source> | |
152 | ||
153 | =item L<Devel::InnerPackage> | |
154 | ||
155 | =item L<Log::Message> | |
156 | ||
157 | =item L<Log::Message::Config> | |
158 | ||
159 | =item L<Log::Message::Handlers> | |
160 | ||
161 | =item L<Log::Message::Item> | |
162 | ||
163 | =item L<Log::Message::Simple> | |
164 | ||
165 | =item L<Module::Pluggable> | |
166 | ||
167 | =item L<Module::Pluggable::Object> | |
168 | ||
169 | =item L<Object::Accessor> | |
170 | ||
171 | =item L<Term::UI> | |
172 | ||
173 | =item L<Term::UI::History> | |
174 | ||
175 | =back | |
176 | ||
177 | =head3 Deprecated Utilities | |
178 | ||
179 | The following utilities will be removed from the core distribution in a | |
180 | future release as their associated modules have been deprecated. They | |
181 | will remain available with the applicable CPAN distribution. | |
182 | ||
183 | =over | |
184 | ||
185 | =item L<cpanp> | |
186 | ||
187 | Included with L<CPANPLUS>. | |
188 | ||
9150e781 | 189 | =item C<cpanp-run-perl> |
3f01b192 CBW |
190 | |
191 | Included with L<CPANPLUS>. | |
192 | ||
193 | =item L<cpan2dist> | |
194 | ||
195 | Included with L<CPANPLUS>. | |
196 | ||
197 | =item L<pod2latex> | |
198 | ||
199 | The L<Pod::LaTeX> module was deprecated with 5.17.8. | |
200 | ||
201 | =back | |
202 | ||
ff56e4f1 KW |
203 | =head2 Five additional characters should be escaped in patterns with C</x> |
204 | ||
205 | When a regular expression pattern is compiled with C</x>, Perl treats 6 | |
206 | characters as white space to ignore, such as SPACE and TAB. However, | |
207 | Unicode recommends 11 characters be treated thusly. In preparation to | |
208 | conforming with this in a future Perl version, in the meantime, use of | |
209 | any of the missing characters will raise a deprecation warning, unless | |
210 | turned off. The five characters are: | |
211 | U+0085 NEXT LINE, | |
212 | U+200E LEFT-TO-RIGHT MARK, | |
213 | U+200F RIGHT-TO-LEFT MARK, | |
214 | U+2028 LINE SEPARATOR, | |
215 | and | |
216 | U+2029 PARAGRAPH SEPARATOR. | |
217 | ||
19718730 AC |
218 | =head1 Modules and Pragmata |
219 | ||
220 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> | |
221 | go here. If Module::CoreList is updated, generate an initial draft of the | |
222 | following sections using F<Porting/corelist-perldelta.pl>, which prints stub | |
223 | entries to STDOUT. Results can be pasted in place of the '=head2' entries | |
224 | below. A paragraph summary for important changes should then be added by hand. | |
225 | In an ideal world, dual-life modules would have a F<Changes> file that could be | |
226 | cribbed. | |
227 | ||
228 | [ Within each section, list entries as a =item entry ] | |
229 | ||
230 | =head2 New Modules and Pragmata | |
751611d4 | 231 | |
6253ee75 | 232 | =over 4 |
751611d4 FC |
233 | |
234 | =item * | |
235 | ||
f3f40957 CBW |
236 | L<Config::Perl::V> version 0.16 has been added as a dual-lifed module. |
237 | It provides structured data retrieval of C<perl -V> output including | |
238 | information only known to the C<perl> binary and not available via L<Config>. | |
751611d4 | 239 | |
19718730 | 240 | =back |
86148eee | 241 | |
19718730 AC |
242 | =head2 Updated Modules and Pragmata |
243 | ||
244 | =over 4 | |
7a7a10c7 | 245 | |
e14ac59b | 246 | =item * |
7a7a10c7 | 247 | |
a820780c DG |
248 | L<Benchmark> has been upgraded from version 1.13 to 1.14. |
249 | ||
250 | The "too few iterations" message is now a warning on STDERR | |
251 | instead of being output on STDOUT. | |
252 | ||
253 | =item * | |
254 | ||
8cdf5bac JK |
255 | L<Data::Dumper> has been upgraded from version 2.141 to 2.142. |
256 | ||
257 | Additional tests were added in order to improve statement, branch, condition | |
258 | and subroutine coverage. On the basis of the coverage analysis, some of the | |
259 | internals of Dumper.pm were refactored. Almost all methods are now | |
260 | documented. | |
261 | ||
262 | =item * | |
263 | ||
46205598 DG |
264 | L<File::Temp> has been upgraded from version 0.22 to 0.22_90 |
265 | ||
266 | Fixes various bugs involving directory removal. Defers unlinking tempfiles if | |
267 | the initial unlink fails, which fixes problems on NFS. | |
268 | ||
269 | =item * | |
270 | ||
e58c5aaf TC |
271 | L<PerlIO::scalar> has been upgraded from version 0.15 to 0.16. |
272 | ||
273 | The buffer scalar supplied may now only contain code pounts 0xFF or | |
274 | lower. [perl #109828] | |
7a7a10c7 | 275 | |
19718730 AC |
276 | =back |
277 | ||
19718730 | 278 | =head1 Documentation |
11e375e0 | 279 | |
19718730 AC |
280 | =head2 Changes to Existing Documentation |
281 | ||
b9214e65 | 282 | =head3 L<perlsec> |
19718730 AC |
283 | |
284 | =over 4 | |
dd4b1c75 AC |
285 | |
286 | =item * | |
287 | ||
b9214e65 | 288 | A syntax error was fixed in one of illustrative examples. |
cb077ed2 | 289 | |
5d8c8c8a | 290 | =back |
5f877a7f | 291 | |
e14ac59b RS |
292 | =head1 Diagnostics |
293 | ||
294 | The following additions or changes have been made to diagnostic output, | |
295 | including warnings and fatal error messages. For the complete list of | |
296 | diagnostic messages, see L<perldiag>. | |
1ea91bbe | 297 | |
6253ee75 DR |
298 | =head2 New Diagnostics |
299 | ||
19718730 AC |
300 | =head3 New Warnings |
301 | ||
302 | =over 4 | |
5e0a247b KW |
303 | |
304 | =item * | |
305 | ||
d2d1e842 | 306 | Strings with code points over 0xFF may not be mapped into in-memory file handles |
19718730 AC |
307 | |
308 | =back | |
309 | ||
310 | =head2 Changes to Existing Diagnostics | |
311 | ||
19718730 | 312 | =over 4 |
e14ac59b | 313 | |
6253ee75 | 314 | =item * |
8b877d20 | 315 | |
b9214e65 CBW |
316 | The warnings for \b{ and \B{ were added in the 5.17 series; they are a |
317 | deprecation warning which should be turned off by that category. One | |
318 | should not have to turn off regular regexp warnings as well to get rid | |
319 | of these. | |
19718730 AC |
320 | |
321 | =back | |
322 | ||
323 | =head1 Utility Changes | |
324 | ||
5bf072ac | 325 | =head3 L<corelist> |
19718730 AC |
326 | |
327 | =over 4 | |
e078d89d FC |
328 | |
329 | =item * | |
330 | ||
5bf072ac CBW |
331 | Added C<--feature> switch which lists the first version bundle of each |
332 | named feature given. | |
e078d89d | 333 | |
09a49503 CBW |
334 | =item * |
335 | ||
336 | Added C<--upstream> switch which shows if the given module | |
337 | is primarily maintained in perl core or on CPAN and bug tracker URL. | |
338 | ||
6253ee75 | 339 | =back |
e078d89d | 340 | |
19718730 AC |
341 | =head1 Configuration and Compilation |
342 | ||
6253ee75 | 343 | =over 4 |
e078d89d | 344 | |
b7c7d786 FC |
345 | =item * |
346 | ||
d2d1e842 CBW |
347 | Added C<useversionedarchname> option to Configure |
348 | ||
349 | When set, it includes 'api_versionstring' in 'archname'. E.g. | |
350 | x86_64-linux-5.13.6-thread-multi. It is unset by default. | |
351 | ||
352 | This feature was requested by Tim Bunce, who observed that | |
353 | INSTALL_BASE creates a library structure that does not | |
354 | differentiate by perl version. Instead, it places architecture | |
355 | specific files in "$install_base/lib/perl5/$archname". This makes | |
356 | it difficult to use a common INSTALL_BASE library path with | |
357 | multiple versions of perl. | |
358 | ||
359 | By setting -Duseversionedarchname, the $archname will be | |
360 | distinct for architecture *and* API version, allowing mixed use of | |
361 | INSTALL_BASE. | |
362 | ||
363 | =item * | |
364 | ||
b9214e65 CBW |
365 | Configure will honour the external C<MAILDOMAIN> environment variable, if set. |
366 | ||
367 | =item * | |
368 | ||
f355e93d CBW |
369 | C<installman> no longer ignores the silent option |
370 | ||
371 | =item * | |
372 | ||
8e8f9da4 | 373 | Both C<META.yml> and C<META.json> files are now included in the distribution. |
19718730 AC |
374 | |
375 | =back | |
376 | ||
377 | =head1 Testing | |
378 | ||
19718730 | 379 | =over 4 |
e14ac59b | 380 | |
fdea6f98 FC |
381 | =item * |
382 | ||
b9214e65 CBW |
383 | Enable perl core tests to pass when locale support is not available. |
384 | ||
385 | use L<locale> - this will now die if $Config{d_setlocale} is not true. | |
386 | All tests that use L<locale> will skip if $Config{d_setlocale} is not true. | |
387 | This enables us to pass tests on Android which uses ICU instead of locales. | |
fdea6f98 | 388 | |
6253ee75 | 389 | =back |
7cf3104f | 390 | |
6253ee75 | 391 | =head1 Platform Support |
7cf3104f | 392 | |
19718730 AC |
393 | =head2 Platform-Specific Notes |
394 | ||
19718730 | 395 | =over 4 |
6e50262c | 396 | |
480c6724 | 397 | =item VMS |
6e50262c | 398 | |
480c6724 CB |
399 | The character set for Extended Filename Syntax (EFS) is now enabled by default on |
400 | VMS. Among other things, this provides better handling of dots in directory names, | |
401 | multiple dots in filenames,and spaces in filenames. To obtain the old behavior, | |
402 | set the logical name C<DECC$EFS_CHARSET> to C<DISABLE>. | |
785fb813 | 403 | |
8a987e1a CBW |
404 | =item MidnightBSD |
405 | ||
406 | C<libc_r> was removed from recent versions of MidnightBSD and older versions | |
407 | work better with C<pthread>. Threading is now enabled using C<pthread> which | |
408 | corrects build errors with threading enabled on 0.4-CURRENT. | |
409 | ||
0e55f0d7 | 410 | =back |
785fb813 | 411 | |
0e55f0d7 | 412 | =head1 Internal Changes |
f5778209 | 413 | |
6253ee75 | 414 | =over 4 |
f5778209 | 415 | |
216cf7fc DR |
416 | =item * |
417 | ||
12719193 KW |
418 | Synonyms for the misleadingly named C<av_len()> has been created: |
419 | C<av_top_index()> and C<av_tindex>. All three of these return the | |
420 | number of the highest index in the array, not the number of elements it | |
421 | contains. (The name C<av_top> which was introduced in Perl v.5.17.8 has | |
422 | been removed.) | |
423 | ||
6253ee75 | 424 | =back |
216cf7fc | 425 | |
6253ee75 | 426 | =head1 Selected Bug Fixes |
216cf7fc | 427 | |
19718730 | 428 | =over 4 |
216cf7fc | 429 | |
d76c0f4b RS |
430 | =item * |
431 | ||
58cbf594 TC |
432 | -DPERL_GLOBAL_STRUCT builds now free the global struct B<after> |
433 | they've finished using it. | |
d76c0f4b | 434 | |
b9214e65 CBW |
435 | =item * |
436 | ||
437 | A trailing '/' on a path in @INC will no longer have an additional '/' appended. | |
438 | ||
250ef6a9 KW |
439 | =item * |
440 | ||
441 | The C<:crlf> layer now works when unread data doesn't fit into its own | |
442 | buffer. [perl #112244]. | |
443 | ||
444 | =item * | |
445 | ||
446 | C<ungetc()> now handles UTF-8 encoded data. [perl #116322]. | |
447 | ||
6253ee75 | 448 | =back |
6c042f06 | 449 | |
19718730 | 450 | =head1 Acknowledgements |
f5b73711 | 451 | |
58640fcb CBW |
452 | Perl 5.17.9 represents approximately 4 weeks of development since Perl 5.17.8 |
453 | and contains approximately 42,000 lines of changes across 510 files from 35 | |
454 | authors. | |
455 | ||
456 | Perl continues to flourish into its third decade thanks to a vibrant community | |
457 | of users and developers. The following people are known to have contributed the | |
458 | improvements that became Perl 5.17.9: | |
459 | ||
460 | !, Aaron Crane, Alan Haggai Alavi, Alexandr Ciornii, Andy Dougherty, Brad | |
461 | Gilbert, Chris 'BinGOs' Williams, Christian Hansen, Craig A. Berry, Dagfinn | |
462 | Ilmari Mannsåker, Daniel Dragan, Dave Rolsky, David Golden, David Mitchell, | |
463 | Father Chrysostomos, H.Merijn Brand, James E Keenan, Jan Dubois, Jerry D. | |
464 | Hedden, Jess Robinson, Karl Williamson, Kent Fredric, Leon Timmermans, Lucas | |
465 | Holt, Matthew Horsfall, Nicholas Clark, Peter Martini, Rafael Garcia-Suarez, | |
466 | Ricardo Signes, Smylers, Steffen Müller, Steve Hay, Thomas Sibley, Tobias | |
467 | Leich, Tony Cook. | |
468 | ||
469 | The list above is almost certainly incomplete as it is automatically generated | |
470 | from version control history. In particular, it does not include the names of | |
471 | the (very much appreciated) contributors who reported issues to the Perl bug | |
472 | tracker. | |
473 | ||
474 | Many of the changes included in this version originated in the CPAN modules | |
475 | included in Perl's core. We're grateful to the entire CPAN community for | |
476 | helping Perl to flourish. | |
477 | ||
478 | For a more complete list of all of Perl's historical contributors, please see | |
479 | the F<AUTHORS> file in the Perl source distribution. | |
f5b73711 | 480 | |
44691e6f AB |
481 | =head1 Reporting Bugs |
482 | ||
e08634c5 SH |
483 | If you find what you think is a bug, you might check the articles recently |
484 | posted to the comp.lang.perl.misc newsgroup and the perl bug database at | |
485 | http://rt.perl.org/perlbug/ . There may also be information at | |
486 | http://www.perl.org/ , the Perl Home Page. | |
44691e6f | 487 | |
e08634c5 SH |
488 | If you believe you have an unreported bug, please run the L<perlbug> program |
489 | included with your release. Be sure to trim your bug down to a tiny but | |
490 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
491 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. | |
44691e6f AB |
492 | |
493 | If the bug you are reporting has security implications, which make it | |
e08634c5 SH |
494 | inappropriate to send to a publicly archived mailing list, then please send it |
495 | to perl5-security-report@perl.org. This points to a closed subscription | |
496 | unarchived mailing list, which includes all the core committers, who will be | |
497 | able to help assess the impact of issues, figure out a resolution, and help | |
f9001595 | 498 | co-ordinate the release of patches to mitigate or fix the problem across all |
e08634c5 SH |
499 | platforms on which Perl is supported. Please only use this address for |
500 | security issues in the Perl core, not for modules independently distributed on | |
501 | CPAN. | |
44691e6f AB |
502 | |
503 | =head1 SEE ALSO | |
504 | ||
e08634c5 SH |
505 | The F<Changes> file for an explanation of how to view exhaustive details on |
506 | what changed. | |
44691e6f AB |
507 | |
508 | The F<INSTALL> file for how to build Perl. | |
509 | ||
510 | The F<README> file for general stuff. | |
511 | ||
512 | The F<Artistic> and F<Copying> files for copyright information. | |
513 | ||
514 | =cut |