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44691e6f AB |
1 | =encoding utf8 |
2 | ||
3 | =head1 NAME | |
4 | ||
03057ffb A |
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 v5.19.8 | |
e128ab2c | 9 | |
4eabcf70 | 10 | =head1 DESCRIPTION |
6db9054f | 11 | |
03057ffb | 12 | This document describes differences between the 5.19.7 release and the 5.19.8 |
e08634c5 | 13 | release. |
6db9054f | 14 | |
03057ffb A |
15 | If you are upgrading from an earlier release such as 5.19.6, first read |
16 | L<perl5197delta>, which describes differences between 5.19.6 and 5.19.7. | |
12ea29d9 | 17 | |
03057ffb | 18 | =head1 Notice |
b0e181c7 | 19 | |
03057ffb | 20 | XXX Any important notices here |
b0e181c7 | 21 | |
03057ffb | 22 | =head1 Core Enhancements |
22730142 | 23 | |
03057ffb A |
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. | |
22730142 | 27 | |
f5a7f193 KW |
28 | =head2 New C<\p{Unicode}> regular expression pattern property |
29 | ||
30 | This is a synonym for C<\p{Any}> and matches the set of Unicode-defined | |
31 | code points 0 - 0x10FFFF. | |
22730142 | 32 | |
03057ffb | 33 | =head1 Security |
22730142 | 34 | |
03057ffb A |
35 | XXX Any security-related notices go here. In particular, any security |
36 | vulnerabilities closed should be noted here rather than in the | |
37 | L</Selected Bug Fixes> section. | |
6ffbec2c | 38 | |
03057ffb | 39 | [ List each security issue as a =head2 entry ] |
3f0a0d6e | 40 | |
03057ffb | 41 | =head1 Incompatible Changes |
f90332ac | 42 | |
8c74b414 DIM |
43 | =head2 C<do> can no longer be used to call subroutines |
44 | ||
45 | The C<do SUBROUTINE(LIST)> form has resulted in a deprecation warning | |
46 | since Perl v5.0.0, and is now a syntax error. | |
47 | ||
2d88a86a KW |
48 | =head2 C<\p{}>, C<\P{}> matching has changed for non-Unicode code |
49 | points. | |
50 | ||
51 | C<\p{}> and C<\P{}> are defined by Unicode only on Unicode-defined code | |
52 | points (C<U+0000> through C<U+10FFFF>). Their behavior on matching | |
53 | these legal Unicode code points is unchanged, but there are changes for | |
54 | code points C<0x110000> and above. Previously, Perl treated the result | |
55 | of matching C<\p{}> and C<\P{}> against these as C<undef>, which | |
56 | translates into "false". For C<\P{}>, this was then complemented into | |
57 | "true". A warning was supposed to be raised when this happened. | |
58 | However, various optimizations could prevent the warning, and the | |
59 | results were often counter-intuitive, with both a match and its seeming | |
60 | complement being false. Now all non-Unicode code points are treated as | |
61 | typical unassigned Unicode code points. This generally is more | |
62 | Do-What-I-Mean. A warning is raised only if the results are arguably | |
63 | different from a strict Unicode approach, and from what Perl used to do. | |
64 | Code that needs to be strictly Unicode compliant can make this warning | |
65 | fatal, and then Perl always raises the warning. | |
66 | ||
67 | Details are in L<perlunicode/Beyond Unicode code points>. | |
68 | ||
69 | =head2 C<\p{All}> has been expanded to match all possible code points | |
70 | ||
71 | The Perl-defined regular expression pattern element C<\p{All}>, unused | |
72 | on CPAN, used to match just the Unicode code points; now it matches all | |
73 | possible code points; that is, it is equivalent to C<qr/./s>. Thus | |
74 | C<\p{All}> is no longer synonymous with C<\p{Any}>, which continues to | |
75 | match just the Unicode code points, as Unicode says it should. | |
76 | ||
03057ffb | 77 | =head1 Deprecations |
b32cf70e | 78 | |
03057ffb | 79 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
63393c20 | 80 | |
03057ffb | 81 | =head2 Module removals |
63393c20 | 82 | |
03057ffb | 83 | XXX Remove this section if inapplicable. |
63393c20 | 84 | |
03057ffb A |
85 | The following modules will be removed from the core distribution in a |
86 | future release, and will at that time need to be installed from CPAN. | |
87 | Distributions on CPAN which require these modules will need to list them as | |
88 | prerequisites. | |
d5d60e0a | 89 | |
03057ffb A |
90 | The core versions of these modules will now issue C<"deprecated">-category |
91 | warnings to alert you to this fact. To silence these deprecation warnings, | |
92 | install the modules in question from CPAN. | |
b32cf70e | 93 | |
03057ffb A |
94 | Note that these are (with rare exceptions) fine modules that you are encouraged |
95 | to continue to use. Their disinclusion from core primarily hinges on their | |
96 | necessity to bootstrapping a fully functional, CPAN-capable Perl installation, | |
97 | not usually on concerns over their design. | |
1c5add82 | 98 | |
03057ffb | 99 | =over |
4c8323ec | 100 | |
03057ffb A |
101 | XXX Note that deprecated modules should be listed here even if they are listed |
102 | as an updated module in the L</Modules and Pragmata> section. | |
1be87df6 | 103 | |
03057ffb | 104 | =back |
1be87df6 | 105 | |
03057ffb | 106 | [ List each other deprecation as a =head2 entry ] |
1be87df6 | 107 | |
03057ffb | 108 | =head1 Performance Enhancements |
1be87df6 | 109 | |
03057ffb A |
110 | XXX Changes which enhance performance without changing behaviour go here. |
111 | There may well be none in a stable release. | |
86fbe58c | 112 | |
03057ffb | 113 | [ List each enhancement as a =item entry ] |
86fbe58c | 114 | |
03057ffb | 115 | =over 4 |
22730142 | 116 | |
86fbe58c TC |
117 | =item * |
118 | ||
03057ffb | 119 | XXX |
1be87df6 | 120 | |
03057ffb | 121 | =back |
1be87df6 | 122 | |
03057ffb | 123 | =head1 Modules and Pragmata |
1be87df6 | 124 | |
03057ffb A |
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>. A paragraph summary | |
128 | for important changes should then be added by hand. In an ideal world, | |
129 | dual-life modules would have a F<Changes> file that could be cribbed. | |
4c8323ec | 130 | |
03057ffb | 131 | [ Within each section, list entries as a =item entry ] |
4c8323ec | 132 | |
03057ffb | 133 | =head2 New Modules and Pragmata |
6b0ff4b4 | 134 | |
03057ffb | 135 | =over 4 |
1be87df6 A |
136 | |
137 | =item * | |
138 | ||
03057ffb | 139 | XXX |
1be87df6 | 140 | |
03057ffb | 141 | =back |
1be87df6 | 142 | |
03057ffb | 143 | =head2 Updated Modules and Pragmata |
1be87df6 | 144 | |
03057ffb | 145 | =over 4 |
1be87df6 A |
146 | |
147 | =item * | |
148 | ||
3cd3edd2 SH |
149 | L<Encode> has been upgraded from version 2.56 to 2.57. |
150 | ||
151 | UTF-8 is no longer used in the C source (which some compilers didn't like), and | |
152 | some POD errors have been fixed in the documentation. | |
1be87df6 | 153 | |
0d0bc230 SH |
154 | =item * |
155 | ||
156 | The libnet module collection has been upgraded from version 1.23 to 1.24. | |
157 | ||
158 | The handling of CRLF characters in L<Net::FTP> has been fixed. | |
159 | ||
fa846618 TC |
160 | =item * |
161 | ||
162 | L<perl5db.pl> has been upgraded from version 1.42 to 1.43 | |
163 | ||
164 | Fix a crash in tab completion, where available. [perl #120827] | |
165 | ||
03057ffb | 166 | =back |
1be87df6 | 167 | |
03057ffb | 168 | =head2 Removed Modules and Pragmata |
1be87df6 | 169 | |
03057ffb | 170 | =over 4 |
1be87df6 A |
171 | |
172 | =item * | |
173 | ||
03057ffb | 174 | XXX |
1be87df6 | 175 | |
03057ffb | 176 | =back |
1be87df6 | 177 | |
03057ffb | 178 | =head1 Documentation |
6b0ff4b4 | 179 | |
03057ffb A |
180 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
181 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
6b0ff4b4 | 182 | |
03057ffb | 183 | =head2 New Documentation |
1be87df6 | 184 | |
03057ffb | 185 | XXX Changes which create B<new> files in F<pod/> go here. |
1be87df6 | 186 | |
03057ffb | 187 | =head3 L<XXX> |
1be87df6 | 188 | |
03057ffb | 189 | XXX Description of the purpose of the new file here |
1be87df6 | 190 | |
03057ffb | 191 | =head2 Changes to Existing Documentation |
1be87df6 | 192 | |
03057ffb A |
193 | XXX Changes which significantly change existing files in F<pod/> go here. |
194 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
195 | section. | |
1be87df6 | 196 | |
03057ffb | 197 | =head3 L<XXX> |
1be87df6 | 198 | |
03057ffb | 199 | =over 4 |
1be87df6 A |
200 | |
201 | =item * | |
202 | ||
03057ffb | 203 | XXX Description of the change here |
1be87df6 | 204 | |
e6898945 | 205 | =back |
b32cf70e | 206 | |
e6898945 | 207 | =head1 Diagnostics |
b32cf70e | 208 | |
e6898945 CBW |
209 | The following additions or changes have been made to diagnostic output, |
210 | including warnings and fatal error messages. For the complete list of | |
211 | diagnostic messages, see L<perldiag>. | |
b32cf70e | 212 | |
03057ffb A |
213 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
214 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
215 | ||
e6898945 | 216 | =head2 New Diagnostics |
f63abf92 | 217 | |
03057ffb A |
218 | XXX Newly added diagnostic messages go under here, separated into New Errors |
219 | and New Warnings | |
220 | ||
221 | =head3 New Errors | |
b32cf70e | 222 | |
e6898945 | 223 | =over 4 |
b32cf70e CBW |
224 | |
225 | =item * | |
226 | ||
03057ffb A |
227 | XXX L<message|perldiag/"message"> |
228 | ||
229 | =back | |
230 | ||
231 | =head3 New Warnings | |
232 | ||
233 | =over 4 | |
234 | ||
235 | =item * | |
4fa6dd16 | 236 | |
03057ffb | 237 | XXX L<message|perldiag/"message"> |
22f9c36a | 238 | |
2d88a86a KW |
239 | =item * |
240 | ||
241 | L<Matched non-Unicode code point 0x%X against Unicode property; may not be portable|perldiag/"Matched non-Unicode code point 0x%X against Unicode property; may not be portable">. | |
242 | This replaces the message "Code point 0x%X is not Unicode, all \p{} | |
243 | matches fail; all \P{} matches succeed". | |
244 | ||
e6898945 | 245 | =back |
22f9c36a | 246 | |
e6898945 | 247 | =head2 Changes to Existing Diagnostics |
e61cab1a | 248 | |
03057ffb A |
249 | XXX Changes (i.e. rewording) of diagnostic messages go here |
250 | ||
e6898945 | 251 | =over 4 |
b32cf70e CBW |
252 | |
253 | =item * | |
254 | ||
03057ffb | 255 | XXX Describe change here |
b32cf70e | 256 | |
e6898945 | 257 | =back |
b32cf70e | 258 | |
e6898945 | 259 | =head1 Utility Changes |
b32cf70e | 260 | |
03057ffb A |
261 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
262 | Most of these are built within the directories F<utils> and F<x2p>. | |
263 | ||
264 | [ List utility changes as a =head3 entry for each utility and =item | |
265 | entries for each change | |
266 | Use L<XXX> with program names to get proper documentation linking. ] | |
267 | ||
268 | =head3 L<XXX> | |
be08498a | 269 | |
28ee95bc | 270 | =over 4 |
52102bb4 SH |
271 | |
272 | =item * | |
273 | ||
03057ffb | 274 | XXX |
befb5359 | 275 | |
28ee95bc | 276 | =back |
befb5359 | 277 | |
03057ffb A |
278 | =head1 Configuration and Compilation |
279 | ||
280 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools | |
281 | go here. Any other changes to the Perl build process should be listed here. | |
282 | However, any platform-specific changes should be listed in the | |
283 | L</Platform Support> section, instead. | |
284 | ||
285 | [ List changes as a =item entry ]. | |
f90332ac | 286 | |
28ee95bc | 287 | =over 4 |
411e93ce SH |
288 | |
289 | =item * | |
290 | ||
7f02832c BF |
291 | Distinct library basenames with C<d_libname_unique>. |
292 | ||
293 | When compiling perl with this option, the library files for XS modules are | |
294 | named something "unique" -- for example, Hash/Util/Util.so becomes | |
295 | Hash/Util/PL_Hash__Util.so. This behavior is similar to what currently | |
296 | happens on VMS, and serves as groundwork for the Android port. | |
c7a31d00 | 297 | |
e6898945 | 298 | =back |
f90332ac | 299 | |
03057ffb | 300 | =head1 Testing |
8adfd064 | 301 | |
03057ffb A |
302 | XXX Any significant changes to the testing of a freshly built perl should be |
303 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
304 | large changes to the testing harness (e.g. when parallel testing was added). | |
305 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
306 | that they represent may be covered elsewhere. | |
307 | ||
308 | [ List each test improvement as a =item entry ] | |
40d779aa | 309 | |
e6898945 | 310 | =over 4 |
40d779aa | 311 | |
03057ffb | 312 | =item * |
f4a01e9c | 313 | |
03057ffb | 314 | XXX |
eaed284b | 315 | |
ba03bc34 | 316 | =back |
0335212c | 317 | |
03057ffb A |
318 | =head1 Platform Support |
319 | ||
320 | XXX Any changes to platform support should be listed in the sections below. | |
321 | ||
322 | [ Within the sections, list each platform as a =item entry with specific | |
323 | changes as paragraphs below it. ] | |
324 | ||
61d9d362 NC |
325 | =over 4 |
326 | ||
327 | =item * | |
328 | ||
329 | Code related to supporting C<sfio> has been removed. | |
330 | ||
331 | Perl 5.004 added support to use the native API of C<sfio>, AT&T's Safe/Fast | |
332 | I/O library. This code still built with v5.8.0, albeit with many regression | |
333 | tests failing, but was inadvertently broken before the v5.8.1 release, | |
334 | meaning that it has not worked on any version of Perl released since then. | |
335 | In over a decade we have received no bug reports about this, hence it is clear | |
336 | that no-one is using this functionality on any version of Perl that is still | |
337 | supported to any degree. | |
338 | ||
339 | =back | |
340 | ||
03057ffb A |
341 | =head2 New Platforms |
342 | ||
343 | XXX List any platforms that this version of perl compiles on, that previous | |
344 | versions did not. These will either be enabled by new files in the F<hints/> | |
345 | directories, or new subdirectories and F<README> files at the top level of the | |
346 | source tree. | |
0335212c | 347 | |
28ee95bc | 348 | =over 4 |
04380912 | 349 | |
03057ffb | 350 | =item XXX-some-platform |
04380912 | 351 | |
03057ffb | 352 | XXX |
1859dc90 | 353 | |
e6898945 | 354 | =back |
812998f1 | 355 | |
03057ffb A |
356 | =head2 Discontinued Platforms |
357 | ||
358 | XXX List any platforms that this version of perl no longer compiles on. | |
34e8ce87 | 359 | |
e6898945 | 360 | =over 4 |
4c99f16d | 361 | |
03057ffb | 362 | =item XXX-some-platform |
508c1ff6 | 363 | |
03057ffb | 364 | XXX |
7492c6c5 | 365 | |
03057ffb | 366 | =back |
37decf78 | 367 | |
03057ffb | 368 | =head2 Platform-Specific Notes |
37decf78 | 369 | |
03057ffb A |
370 | XXX List any changes for specific platforms. This could include configuration |
371 | and compilation changes or changes in portability/compatibility. However, | |
372 | changes within modules for platforms should generally be listed in the | |
373 | L</Modules and Pragmata> section. | |
4a9a8c6d | 374 | |
03057ffb | 375 | =over 4 |
4a9a8c6d | 376 | |
03057ffb | 377 | =item XXX-some-platform |
346295c2 | 378 | |
03057ffb | 379 | XXX |
346295c2 | 380 | |
03057ffb | 381 | =back |
346295c2 | 382 | |
03057ffb | 383 | =head1 Internal Changes |
346295c2 | 384 | |
03057ffb A |
385 | XXX Changes which affect the interface available to C<XS> code go here. Other |
386 | significant internal changes for future core maintainers should be noted as | |
387 | well. | |
388 | ||
389 | [ List each change as a =item entry ] | |
8b41bb22 | 390 | |
03057ffb | 391 | =over 4 |
8b41bb22 | 392 | |
e8f91c91 DD |
393 | =item newATTRSUB is now a macro |
394 | ||
395 | The public API newATTRSUB was previously a macro to the private | |
396 | function Perl_newATTRSUB. Function Perl_newATTRSUB has been removed. newATTRSUB | |
397 | is now macro to a different internal function. | |
398 | ||
ea5ced44 KW |
399 | =item Changes in warnings raised by C<utf8n_to_uvchr()> |
400 | ||
401 | This bottom level function decodes the first character of a UTF-8 string | |
402 | into a code point. It is accessible to C<XS> level code, but it's | |
403 | discouraged from using it directly. There are higher level functions | |
404 | that call this that should be used instead, such as | |
405 | L<perlapi/utf8_to_uvchr_buf>. For completeness though, this documents | |
406 | some changes to it. Now, tests for malformations are done before any | |
407 | tests for other potential issues. One of those issues involves code | |
408 | points so large that they have never appeared in any official standard | |
409 | (the current standard has scaled back the highest acceptable code point | |
410 | from earlier versions). It is possible (though not done in CPAN) to | |
411 | warn and/or forbid these code points, while accepting smaller code | |
412 | points that are still above the legal Unicode maximum. The warning | |
413 | message for this now includes the code point if representable on the | |
414 | machine. Previously it always displayed raw bytes, which is what it | |
415 | still does for non-representable code points. | |
2412ad36 | 416 | |
03057ffb A |
417 | =back |
418 | ||
419 | =head1 Selected Bug Fixes | |
e0f78657 | 420 | |
03057ffb A |
421 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
422 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
e0f78657 | 423 | |
03057ffb | 424 | [ List each fix as a =item entry ] |
acfee349 | 425 | |
03057ffb | 426 | =over 4 |
acfee349 | 427 | |
df5ac742 | 428 | =item * |
254a1e67 | 429 | |
03057ffb | 430 | XXX |
e6898945 | 431 | |
03057ffb | 432 | =back |
e6898945 | 433 | |
03057ffb | 434 | =head1 Known Problems |
254a1e67 | 435 | |
03057ffb A |
436 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
437 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
438 | platform specific bugs also go here. | |
254a1e67 | 439 | |
03057ffb | 440 | [ List each fix as a =item entry ] |
7492c6c5 | 441 | |
03057ffb | 442 | =over 4 |
cfbe45f9 | 443 | |
03057ffb | 444 | =item * |
b32cf70e | 445 | |
03057ffb | 446 | XXX |
b180fb10 | 447 | |
03057ffb A |
448 | =back |
449 | ||
450 | =head1 Obituary | |
b180fb10 | 451 | |
03057ffb A |
452 | XXX If any significant core contributor has died, we've added a short obituary |
453 | here. | |
b180fb10 | 454 | |
03057ffb | 455 | =head1 Acknowledgements |
b180fb10 | 456 | |
03057ffb | 457 | XXX Generate this with: |
b180fb10 | 458 | |
03057ffb | 459 | perl Porting/acknowledgements.pl v5.19.7..HEAD |
f5b73711 | 460 | |
44691e6f AB |
461 | =head1 Reporting Bugs |
462 | ||
e08634c5 SH |
463 | If you find what you think is a bug, you might check the articles recently |
464 | posted to the comp.lang.perl.misc newsgroup and the perl bug database at | |
e6898945 | 465 | https://rt.perl.org/ . There may also be information at |
e08634c5 | 466 | http://www.perl.org/ , the Perl Home Page. |
44691e6f | 467 | |
e08634c5 SH |
468 | If you believe you have an unreported bug, please run the L<perlbug> program |
469 | included with your release. Be sure to trim your bug down to a tiny but | |
470 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
471 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. | |
44691e6f AB |
472 | |
473 | If the bug you are reporting has security implications, which make it | |
e08634c5 SH |
474 | inappropriate to send to a publicly archived mailing list, then please send it |
475 | to perl5-security-report@perl.org. This points to a closed subscription | |
476 | unarchived mailing list, which includes all the core committers, who will be | |
477 | able to help assess the impact of issues, figure out a resolution, and help | |
f9001595 | 478 | co-ordinate the release of patches to mitigate or fix the problem across all |
e08634c5 SH |
479 | platforms on which Perl is supported. Please only use this address for |
480 | security issues in the Perl core, not for modules independently distributed on | |
481 | CPAN. | |
44691e6f AB |
482 | |
483 | =head1 SEE ALSO | |
484 | ||
e08634c5 SH |
485 | The F<Changes> file for an explanation of how to view exhaustive details on |
486 | what changed. | |
44691e6f AB |
487 | |
488 | The F<INSTALL> file for how to build Perl. | |
489 | ||
490 | The F<README> file for general stuff. | |
491 | ||
492 | The F<Artistic> and F<Copying> files for copyright information. | |
493 | ||
494 | =cut |