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44691e6f AB |
1 | =encoding utf8 |
2 | ||
3 | =head1 NAME | |
4 | ||
86372193 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 v5.21.6 | |
c68523cb | 9 | |
238894db | 10 | =head1 DESCRIPTION |
c68523cb | 11 | |
86372193 | 12 | This document describes differences between the 5.21.5 release and the 5.21.6 |
238894db | 13 | release. |
c68523cb | 14 | |
86372193 A |
15 | If you are upgrading from an earlier release such as 5.21.4, first read |
16 | L<perl5215delta>, which describes differences between 5.21.4 and 5.21.5. | |
8435afd1 | 17 | |
86372193 | 18 | =head1 Notice |
5cfa0642 | 19 | |
86372193 | 20 | XXX Any important notices here |
4cad5dc8 | 21 | |
86372193 | 22 | =head1 Core Enhancements |
4cad5dc8 | 23 | |
86372193 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. | |
a5591204 | 27 | |
86372193 | 28 | [ List each enhancement as a =head2 entry ] |
a5591204 | 29 | |
518159a1 TC |
30 | =head2 List form of pipe open implemented for Win32 |
31 | ||
32 | The list form of pipe: | |
33 | ||
34 | open my $fh, "-|", "program", @arguments; | |
35 | ||
36 | is now implemented on Win32. It has the same limitations as C<system | |
37 | LIST> on Win32, since the Win32 API doesn't accept program arguments | |
38 | as a list. | |
39 | ||
86372193 | 40 | =head1 Security |
a5591204 | 41 | |
86372193 A |
42 | XXX Any security-related notices go here. In particular, any security |
43 | vulnerabilities closed should be noted here rather than in the | |
44 | L</Selected Bug Fixes> section. | |
a5591204 | 45 | |
86372193 | 46 | [ List each security issue as a =head2 entry ] |
a5591204 | 47 | |
86372193 | 48 | =head1 Incompatible Changes |
a5591204 | 49 | |
86372193 | 50 | XXX For a release on a stable branch, this section aspires to be: |
a5591204 | 51 | |
86372193 A |
52 | There are no changes intentionally incompatible with 5.XXX.XXX |
53 | If any exist, they are bugs, and we request that you submit a | |
54 | report. See L</Reporting Bugs> below. | |
b15c1b56 | 55 | |
86372193 | 56 | [ List each incompatible change as a =head2 entry ] |
b15c1b56 | 57 | |
86372193 | 58 | =head1 Deprecations |
bb8c7e27 | 59 | |
86372193 | 60 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
bb8c7e27 | 61 | |
86372193 | 62 | =head2 Module removals |
bb8c7e27 | 63 | |
86372193 | 64 | XXX Remove this section if inapplicable. |
9a88d663 | 65 | |
86372193 A |
66 | The following modules will be removed from the core distribution in a |
67 | future release, and will at that time need to be installed from CPAN. | |
68 | Distributions on CPAN which require these modules will need to list them as | |
69 | prerequisites. | |
9a88d663 | 70 | |
86372193 A |
71 | The core versions of these modules will now issue C<"deprecated">-category |
72 | warnings to alert you to this fact. To silence these deprecation warnings, | |
73 | install the modules in question from CPAN. | |
5cfa0642 | 74 | |
86372193 A |
75 | Note that these are (with rare exceptions) fine modules that you are encouraged |
76 | to continue to use. Their disinclusion from core primarily hinges on their | |
77 | necessity to bootstrapping a fully functional, CPAN-capable Perl installation, | |
78 | not usually on concerns over their design. | |
ba474e87 | 79 | |
86372193 | 80 | =over |
8435afd1 | 81 | |
86372193 | 82 | =item XXX |
d0ab07ee | 83 | |
86372193 A |
84 | XXX Note that deprecated modules should be listed here even if they are listed |
85 | as an updated module in the L</Modules and Pragmata> section. | |
cc4d09e1 | 86 | |
86372193 | 87 | =back |
cc4d09e1 | 88 | |
86372193 | 89 | [ List each other deprecation as a =head2 entry ] |
8435afd1 | 90 | |
4475d0d2 KW |
91 | =head2 Use of non-graphic characters in single-character variable names |
92 | ||
93 | The syntax for single-character variable names is more lenient than | |
94 | for longer variable names, allowing the one-character name to be a | |
95 | punctuation character or even invisible (a non-graphic). Perl v5.20 | |
96 | deprecated the ASCII-range controls as such a name. Now, all | |
97 | non-graphic characters that formerly were allowed are deprecated. | |
98 | The practical effect of this occurs only when not under C<S<"use | |
99 | utf8">>, and affects just the C1 controls (code points 0x80 through | |
100 | 0xFF), NO-BREAK SPACE, and SOFT HYPHEN. | |
101 | ||
8c8d6154 | 102 | =head1 Performance Enhancements |
5cfa0642 | 103 | |
86372193 A |
104 | XXX Changes which enhance performance without changing behaviour go here. |
105 | There may well be none in a stable release. | |
5cfa0642 | 106 | |
86372193 | 107 | [ List each enhancement as a =item entry ] |
8435afd1 | 108 | |
86372193 | 109 | =over 4 |
5cfa0642 | 110 | |
5b306eef DD |
111 | =item * |
112 | ||
86372193 | 113 | XXX |
5b306eef | 114 | |
86372193 | 115 | =back |
357205d5 | 116 | |
86372193 | 117 | =head1 Modules and Pragmata |
357205d5 | 118 | |
86372193 A |
119 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
120 | go here. If Module::CoreList is updated, generate an initial draft of the | |
121 | following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary | |
122 | for important changes should then be added by hand. In an ideal world, | |
123 | dual-life modules would have a F<Changes> file that could be cribbed. | |
f704f251 | 124 | |
86372193 | 125 | [ Within each section, list entries as a =item entry ] |
f704f251 | 126 | |
86372193 | 127 | =head2 New Modules and Pragmata |
0cb3abac | 128 | |
86372193 | 129 | =over 4 |
0cb3abac | 130 | |
deec1830 FC |
131 | =item * |
132 | ||
86372193 | 133 | XXX |
deec1830 | 134 | |
8c8d6154 | 135 | =back |
d0ab07ee | 136 | |
8c8d6154 | 137 | =head2 Updated Modules and Pragmata |
d99849ae | 138 | |
39c4a6cf | 139 | =over 4 |
d99849ae | 140 | |
ff433f2d PM |
141 | =item * |
142 | ||
bab69578 TC |
143 | L<IO::Socket> has been upgraded from version 1.37 to 1.38. |
144 | ||
145 | Document the limitations of the isconnected() method. [perl #123096] | |
cbfcbc14 | 146 | |
86372193 | 147 | =back |
f348c3d8 | 148 | |
86372193 | 149 | =head2 Removed Modules and Pragmata |
f348c3d8 | 150 | |
86372193 | 151 | =over 4 |
f348c3d8 A |
152 | |
153 | =item * | |
154 | ||
86372193 | 155 | XXX |
f348c3d8 | 156 | |
86372193 | 157 | =back |
7635ad4d | 158 | |
86372193 | 159 | =head1 Documentation |
7635ad4d | 160 | |
86372193 A |
161 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
162 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
7635ad4d | 163 | |
86372193 | 164 | =head2 New Documentation |
f348c3d8 | 165 | |
86372193 | 166 | XXX Changes which create B<new> files in F<pod/> go here. |
f348c3d8 | 167 | |
86372193 | 168 | =head3 L<XXX> |
f4eedc6b | 169 | |
86372193 | 170 | XXX Description of the purpose of the new file here |
f4eedc6b | 171 | |
86372193 | 172 | =head2 Changes to Existing Documentation |
f4eedc6b | 173 | |
86372193 A |
174 | XXX Changes which significantly change existing files in F<pod/> go here. |
175 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
176 | section. | |
f348c3d8 | 177 | |
42327f06 | 178 | =head3 L<perldata/Identifier parsing> |
f348c3d8 | 179 | |
86372193 | 180 | =over 4 |
f348c3d8 A |
181 | |
182 | =item * | |
183 | ||
42327f06 KW |
184 | The syntax of single-character variable names has been brought |
185 | up-to-date and more fully explained. | |
f348c3d8 | 186 | |
86372193 | 187 | =back |
f348c3d8 | 188 | |
86372193 | 189 | =head1 Diagnostics |
f348c3d8 | 190 | |
86372193 A |
191 | The following additions or changes have been made to diagnostic output, |
192 | including warnings and fatal error messages. For the complete list of | |
193 | diagnostic messages, see L<perldiag>. | |
f348c3d8 | 194 | |
86372193 A |
195 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
196 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
f348c3d8 | 197 | |
86372193 | 198 | =head2 New Diagnostics |
f348c3d8 | 199 | |
86372193 A |
200 | XXX Newly added diagnostic messages go under here, separated into New Errors |
201 | and New Warnings | |
f348c3d8 | 202 | |
86372193 | 203 | =head3 New Errors |
84d03adf | 204 | |
86372193 | 205 | =over 4 |
ff433f2d | 206 | |
4cd408ba TC |
207 | =item * |
208 | ||
86372193 | 209 | XXX L<message|perldiag/"message"> |
f348c3d8 | 210 | |
86372193 | 211 | =back |
f348c3d8 | 212 | |
86372193 | 213 | =head3 New Warnings |
f4eedc6b | 214 | |
86372193 | 215 | =over 4 |
f4eedc6b DD |
216 | |
217 | =item * | |
218 | ||
4475d0d2 | 219 | L<Use of literal non-graphic characters in variable names is deprecated|perldiag/"Use of literal non-graphic characters in variable names is deprecated"> |
f348c3d8 | 220 | |
86372193 | 221 | =back |
0561e60b | 222 | |
86372193 | 223 | =head2 Changes to Existing Diagnostics |
0561e60b | 224 | |
86372193 | 225 | XXX Changes (i.e. rewording) of diagnostic messages go here |
0561e60b | 226 | |
86372193 | 227 | =over 4 |
4cd408ba | 228 | |
f348c3d8 A |
229 | =item * |
230 | ||
86372193 | 231 | XXX Describe change here |
4cd408ba | 232 | |
86372193 | 233 | =back |
40a81b59 | 234 | |
86372193 | 235 | =head1 Utility Changes |
f348c3d8 | 236 | |
86372193 A |
237 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
238 | Most of these are built within the directory F<utils>. | |
f348c3d8 | 239 | |
86372193 A |
240 | [ List utility changes as a =head2 entry for each utility and =item |
241 | entries for each change | |
242 | Use L<XXX> with program names to get proper documentation linking. ] | |
f348c3d8 | 243 | |
86372193 | 244 | =head2 L<XXX> |
f348c3d8 | 245 | |
86372193 | 246 | =over 4 |
f348c3d8 A |
247 | |
248 | =item * | |
249 | ||
86372193 | 250 | XXX |
40a81b59 | 251 | |
13900f93 | 252 | =back |
aac7f82f | 253 | |
86372193 | 254 | =head1 Configuration and Compilation |
2a395b86 | 255 | |
86372193 A |
256 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
257 | go here. Any other changes to the Perl build process should be listed here. | |
258 | However, any platform-specific changes should be listed in the | |
259 | L</Platform Support> section, instead. | |
8435afd1 | 260 | |
86372193 | 261 | [ List changes as a =item entry ]. |
8435afd1 SH |
262 | |
263 | =over 4 | |
2a395b86 | 264 | |
12d22d1f JK |
265 | =item * |
266 | ||
c517e197 | 267 | F<Configure> with C<-Dmksymlinks> should now be faster. [perl #122002] |
12d22d1f | 268 | |
2a395b86 PM |
269 | =back |
270 | ||
86372193 | 271 | =head1 Testing |
2a395b86 | 272 | |
86372193 A |
273 | XXX Any significant changes to the testing of a freshly built perl should be |
274 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
275 | large changes to the testing harness (e.g. when parallel testing was added). | |
276 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
277 | that they represent may be covered elsewhere. | |
2a395b86 | 278 | |
86372193 | 279 | [ List each test improvement as a =item entry ] |
5cfa0642 | 280 | |
8c8d6154 | 281 | =over 4 |
2a395b86 PM |
282 | |
283 | =item * | |
284 | ||
86372193 | 285 | XXX |
bb8c7e27 | 286 | |
86372193 | 287 | =back |
bb8c7e27 | 288 | |
86372193 | 289 | =head1 Platform Support |
bb8c7e27 | 290 | |
86372193 | 291 | XXX Any changes to platform support should be listed in the sections below. |
bb8c7e27 | 292 | |
86372193 A |
293 | [ Within the sections, list each platform as a =item entry with specific |
294 | changes as paragraphs below it. ] | |
2a395b86 | 295 | |
86372193 | 296 | =head2 New Platforms |
6d9b7c7c | 297 | |
86372193 A |
298 | XXX List any platforms that this version of perl compiles on, that previous |
299 | versions did not. These will either be enabled by new files in the F<hints/> | |
300 | directories, or new subdirectories and F<README> files at the top level of the | |
301 | source tree. | |
363d3025 | 302 | |
8c8d6154 | 303 | =over 4 |
334464b3 | 304 | |
86372193 | 305 | =item XXX-some-platform |
334464b3 | 306 | |
86372193 | 307 | XXX |
ef5a9509 | 308 | |
363d3025 FC |
309 | =back |
310 | ||
86372193 A |
311 | =head2 Discontinued Platforms |
312 | ||
313 | XXX List any platforms that this version of perl no longer compiles on. | |
d72cd2eb | 314 | |
0346c3a9 | 315 | =over 4 |
375f5f06 | 316 | |
86372193 | 317 | =item XXX-some-platform |
2884baee | 318 | |
86372193 | 319 | XXX |
6f1a844b | 320 | |
8c8d6154 | 321 | =back |
549ea8d4 | 322 | |
8c8d6154 | 323 | =head2 Platform-Specific Notes |
aa292ef2 | 324 | |
86372193 A |
325 | XXX List any changes for specific platforms. This could include configuration |
326 | and compilation changes or changes in portability/compatibility. However, | |
327 | changes within modules for platforms should generally be listed in the | |
328 | L</Modules and Pragmata> section. | |
329 | ||
8c8d6154 | 330 | =over 4 |
739e9bee | 331 | |
86372193 | 332 | =item XXX-some-platform |
739e9bee | 333 | |
86372193 | 334 | XXX |
b23b2fdb | 335 | |
8c8d6154 | 336 | =back |
b23b2fdb | 337 | |
83b69bfd DD |
338 | =head3 Win32 |
339 | ||
340 | =over 4 | |
341 | ||
342 | =item * | |
343 | ||
344 | In the experimental C<:win32> layer, a crash in C<open> was fixed. Also | |
345 | opening C</dev/null>, which works the Win32 Perl's normal C<:unix> layer, was | |
346 | implemented for C<:win32>. | |
347 | L<[perl #122224]|https://rt.perl.org/Ticket/Display.html?id=122224> | |
348 | ||
349 | =back | |
350 | ||
8c8d6154 | 351 | =head1 Internal Changes |
7d15b1a8 | 352 | |
86372193 A |
353 | XXX Changes which affect the interface available to C<XS> code go here. Other |
354 | significant internal changes for future core maintainers should be noted as | |
355 | well. | |
bbca64cf | 356 | |
86372193 | 357 | [ List each change as a =item entry ] |
6ff8f256 | 358 | |
86372193 | 359 | =over 4 |
28482d6c | 360 | |
28a42920 A |
361 | =item * |
362 | ||
86372193 | 363 | XXX |
28a42920 | 364 | |
8c8d6154 | 365 | =back |
6ff8f256 | 366 | |
8c8d6154 | 367 | =head1 Selected Bug Fixes |
80cc3290 | 368 | |
86372193 A |
369 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
370 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
13dd5671 | 371 | |
86372193 | 372 | [ List each fix as a =item entry ] |
bdab7676 | 373 | |
86372193 | 374 | =over 4 |
db98db4e | 375 | |
8818afe8 TC |
376 | =item * |
377 | ||
2ad9844a TC |
378 | fchmod() and futimes() now set C<$!> when they fail due to being |
379 | passed a closed file handle. [perl #122703] | |
bb8c7e27 | 380 | |
9ee757be KW |
381 | =item * |
382 | ||
383 | Perl now comes with a corrected Unicode 7.0 for the erratum issued on | |
384 | October 21, 2014 (see L<http://www.unicode.org/errata/#current_errata>), | |
385 | dealing with glyph shaping in Arabic. | |
386 | ||
86372193 | 387 | =back |
bb8c7e27 | 388 | |
86372193 | 389 | =head1 Known Problems |
bb8c7e27 | 390 | |
86372193 A |
391 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
392 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
393 | platform specific bugs also go here. | |
bb8c7e27 | 394 | |
86372193 | 395 | [ List each fix as a =item entry ] |
bb8c7e27 | 396 | |
86372193 | 397 | =over 4 |
bb8c7e27 | 398 | |
74f9f9ed A |
399 | =item * |
400 | ||
eacbb379 DD |
401 | Starting in 5.21.6, accessing L<perlapi/CvPADLIST> in an XSUB is forbidden. |
402 | CvPADLIST has be reused for a different internal purpose for XSUBs. Guard all | |
403 | CvPADLIST expressions with C<CvISXSUB()> if your code doesn't already block | |
404 | XSUB CV*s from going through optree CV* expecting code. | |
28a42920 | 405 | |
86372193 | 406 | =back |
28a42920 | 407 | |
86372193 | 408 | =head1 Errata From Previous Releases |
28a42920 | 409 | |
86372193 | 410 | =over 4 |
28a42920 A |
411 | |
412 | =item * | |
413 | ||
86372193 A |
414 | XXX Add anything here that we forgot to add, or were mistaken about, in |
415 | the perldelta of a previous release. | |
28a42920 | 416 | |
8c8d6154 | 417 | =back |
3a085d00 | 418 | |
86372193 | 419 | =head1 Obituary |
01d42a22 | 420 | |
86372193 A |
421 | XXX If any significant core contributor has died, we've added a short obituary |
422 | here. | |
01d42a22 | 423 | |
86372193 | 424 | =head1 Acknowledgements |
01d42a22 | 425 | |
86372193 | 426 | XXX Generate this with: |
01d42a22 | 427 | |
86372193 | 428 | perl Porting/acknowledgements.pl v5.21.5..HEAD |
f5b73711 | 429 | |
44691e6f AB |
430 | =head1 Reporting Bugs |
431 | ||
e08634c5 SH |
432 | If you find what you think is a bug, you might check the articles recently |
433 | posted to the comp.lang.perl.misc newsgroup and the perl bug database at | |
238894db | 434 | https://rt.perl.org/ . There may also be information at |
7ef8b31d | 435 | http://www.perl.org/ , the Perl Home Page. |
44691e6f | 436 | |
e08634c5 SH |
437 | If you believe you have an unreported bug, please run the L<perlbug> program |
438 | included with your release. Be sure to trim your bug down to a tiny but | |
439 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
440 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. | |
44691e6f AB |
441 | |
442 | If the bug you are reporting has security implications, which make it | |
e08634c5 SH |
443 | inappropriate to send to a publicly archived mailing list, then please send it |
444 | to perl5-security-report@perl.org. This points to a closed subscription | |
445 | unarchived mailing list, which includes all the core committers, who will be | |
446 | able to help assess the impact of issues, figure out a resolution, and help | |
f9001595 | 447 | co-ordinate the release of patches to mitigate or fix the problem across all |
e08634c5 SH |
448 | platforms on which Perl is supported. Please only use this address for |
449 | security issues in the Perl core, not for modules independently distributed on | |
450 | CPAN. | |
44691e6f AB |
451 | |
452 | =head1 SEE ALSO | |
453 | ||
e08634c5 SH |
454 | The F<Changes> file for an explanation of how to view exhaustive details on |
455 | what changed. | |
44691e6f AB |
456 | |
457 | The F<INSTALL> file for how to build Perl. | |
458 | ||
459 | The F<README> file for general stuff. | |
460 | ||
461 | The F<Artistic> and F<Copying> files for copyright information. | |
462 | ||
463 | =cut |