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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 $fh, "-|", "program", @arguments; | |
35 | ||
36 | is now implemented on Win32. It has the same limitations as C<system | |
37 | LIST> on Win32, since the Win32 API doesn't accept program arguments | |
38 | as a list. | |
39 | ||
fe609065 FC |
40 | =head2 Assignment to list repetition |
41 | ||
42 | C<(...) x ...> can now be used within a list that is assigned to, as long | |
43 | as the left-hand side is a valid lvalue. This allows C<(undef,undef,$foo) | |
44 | = that_function()> to be written as C<((undef)x2, $foo) = that_function()>. | |
45 | ||
295f7815 FC |
46 | =head2 C<close> now sets C<$!> |
47 | ||
48 | When an I/O error occurs, the fact that there has been an error is recorded | |
49 | in the handle. C<close> returns false for such a handle. Previously, the | |
50 | value of C<$!> would be untouched by C<close>, so the common convention of | |
51 | writing C<close $fh or die $!> did not work reliably. Now the handle | |
52 | records the value of C<$!>, too, and C<close> restores it. | |
53 | ||
86372193 | 54 | =head1 Security |
a5591204 | 55 | |
86372193 A |
56 | XXX Any security-related notices go here. In particular, any security |
57 | vulnerabilities closed should be noted here rather than in the | |
58 | L</Selected Bug Fixes> section. | |
a5591204 | 59 | |
86372193 | 60 | [ List each security issue as a =head2 entry ] |
a5591204 | 61 | |
86372193 | 62 | =head1 Incompatible Changes |
a5591204 | 63 | |
86372193 | 64 | XXX For a release on a stable branch, this section aspires to be: |
a5591204 | 65 | |
86372193 A |
66 | There are no changes intentionally incompatible with 5.XXX.XXX |
67 | If any exist, they are bugs, and we request that you submit a | |
68 | report. See L</Reporting Bugs> below. | |
b15c1b56 | 69 | |
86372193 | 70 | [ List each incompatible change as a =head2 entry ] |
b15c1b56 | 71 | |
86372193 | 72 | =head1 Deprecations |
bb8c7e27 | 73 | |
86372193 | 74 | XXX Any deprecated features, syntax, modules etc. should be listed here. |
bb8c7e27 | 75 | |
86372193 | 76 | =head2 Module removals |
bb8c7e27 | 77 | |
86372193 | 78 | XXX Remove this section if inapplicable. |
9a88d663 | 79 | |
86372193 A |
80 | The following modules will be removed from the core distribution in a |
81 | future release, and will at that time need to be installed from CPAN. | |
82 | Distributions on CPAN which require these modules will need to list them as | |
83 | prerequisites. | |
9a88d663 | 84 | |
86372193 A |
85 | The core versions of these modules will now issue C<"deprecated">-category |
86 | warnings to alert you to this fact. To silence these deprecation warnings, | |
87 | install the modules in question from CPAN. | |
5cfa0642 | 88 | |
86372193 A |
89 | Note that these are (with rare exceptions) fine modules that you are encouraged |
90 | to continue to use. Their disinclusion from core primarily hinges on their | |
91 | necessity to bootstrapping a fully functional, CPAN-capable Perl installation, | |
92 | not usually on concerns over their design. | |
ba474e87 | 93 | |
86372193 | 94 | =over |
8435afd1 | 95 | |
86372193 | 96 | =item XXX |
d0ab07ee | 97 | |
86372193 A |
98 | XXX Note that deprecated modules should be listed here even if they are listed |
99 | as an updated module in the L</Modules and Pragmata> section. | |
cc4d09e1 | 100 | |
86372193 | 101 | =back |
cc4d09e1 | 102 | |
86372193 | 103 | [ List each other deprecation as a =head2 entry ] |
8435afd1 | 104 | |
4475d0d2 KW |
105 | =head2 Use of non-graphic characters in single-character variable names |
106 | ||
107 | The syntax for single-character variable names is more lenient than | |
108 | for longer variable names, allowing the one-character name to be a | |
109 | punctuation character or even invisible (a non-graphic). Perl v5.20 | |
110 | deprecated the ASCII-range controls as such a name. Now, all | |
111 | non-graphic characters that formerly were allowed are deprecated. | |
112 | The practical effect of this occurs only when not under C<S<"use | |
113 | utf8">>, and affects just the C1 controls (code points 0x80 through | |
114 | 0xFF), NO-BREAK SPACE, and SOFT HYPHEN. | |
115 | ||
8c8d6154 | 116 | =head1 Performance Enhancements |
5cfa0642 | 117 | |
86372193 A |
118 | XXX Changes which enhance performance without changing behaviour go here. |
119 | There may well be none in a stable release. | |
5cfa0642 | 120 | |
86372193 | 121 | [ List each enhancement as a =item entry ] |
8435afd1 | 122 | |
86372193 | 123 | =over 4 |
5cfa0642 | 124 | |
5b306eef DD |
125 | =item * |
126 | ||
25a8e2be FC |
127 | C<(...)x1>, C<("constant")x0> and C<($scalar)x0> are now optimised in list |
128 | context. If the right-hand argument is a constant 1, the repetition | |
129 | operator disappears. If the right-hand argument is a constant 0, the whole | |
130 | expressions is optimised to the empty list, so long as the left-hand | |
131 | argument is a simple scalar or constant. C<(foo())x0> is not optimised. | |
5b306eef | 132 | |
86372193 | 133 | =back |
357205d5 | 134 | |
86372193 | 135 | =head1 Modules and Pragmata |
357205d5 | 136 | |
86372193 A |
137 | XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> |
138 | go here. If Module::CoreList is updated, generate an initial draft of the | |
139 | following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary | |
140 | for important changes should then be added by hand. In an ideal world, | |
141 | dual-life modules would have a F<Changes> file that could be cribbed. | |
f704f251 | 142 | |
86372193 | 143 | [ Within each section, list entries as a =item entry ] |
f704f251 | 144 | |
86372193 | 145 | =head2 New Modules and Pragmata |
0cb3abac | 146 | |
86372193 | 147 | =over 4 |
0cb3abac | 148 | |
deec1830 FC |
149 | =item * |
150 | ||
86372193 | 151 | XXX |
deec1830 | 152 | |
8c8d6154 | 153 | =back |
d0ab07ee | 154 | |
8c8d6154 | 155 | =head2 Updated Modules and Pragmata |
d99849ae | 156 | |
39c4a6cf | 157 | =over 4 |
d99849ae | 158 | |
ff433f2d PM |
159 | =item * |
160 | ||
bab69578 TC |
161 | L<IO::Socket> has been upgraded from version 1.37 to 1.38. |
162 | ||
163 | Document the limitations of the isconnected() method. [perl #123096] | |
cbfcbc14 | 164 | |
bb6a367a DD |
165 | =item * |
166 | ||
167 | L<DynaLoader> has been upgraded from version 1.27 to 1.28. | |
168 | ||
86372193 | 169 | =back |
f348c3d8 | 170 | |
86372193 | 171 | =head2 Removed Modules and Pragmata |
f348c3d8 | 172 | |
86372193 | 173 | =over 4 |
f348c3d8 A |
174 | |
175 | =item * | |
176 | ||
86372193 | 177 | XXX |
f348c3d8 | 178 | |
86372193 | 179 | =back |
7635ad4d | 180 | |
86372193 | 181 | =head1 Documentation |
7635ad4d | 182 | |
86372193 A |
183 | XXX Changes to files in F<pod/> go here. Consider grouping entries by |
184 | file and be sure to link to the appropriate page, e.g. L<perlfunc>. | |
7635ad4d | 185 | |
86372193 | 186 | =head2 New Documentation |
f348c3d8 | 187 | |
86372193 | 188 | XXX Changes which create B<new> files in F<pod/> go here. |
f348c3d8 | 189 | |
86372193 | 190 | =head3 L<XXX> |
f4eedc6b | 191 | |
86372193 | 192 | XXX Description of the purpose of the new file here |
f4eedc6b | 193 | |
86372193 | 194 | =head2 Changes to Existing Documentation |
f4eedc6b | 195 | |
86372193 A |
196 | XXX Changes which significantly change existing files in F<pod/> go here. |
197 | However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> | |
198 | section. | |
f348c3d8 | 199 | |
42327f06 | 200 | =head3 L<perldata/Identifier parsing> |
f348c3d8 | 201 | |
86372193 | 202 | =over 4 |
f348c3d8 A |
203 | |
204 | =item * | |
205 | ||
42327f06 KW |
206 | The syntax of single-character variable names has been brought |
207 | up-to-date and more fully explained. | |
f348c3d8 | 208 | |
86372193 | 209 | =back |
f348c3d8 | 210 | |
86372193 | 211 | =head1 Diagnostics |
f348c3d8 | 212 | |
86372193 A |
213 | The following additions or changes have been made to diagnostic output, |
214 | including warnings and fatal error messages. For the complete list of | |
215 | diagnostic messages, see L<perldiag>. | |
f348c3d8 | 216 | |
86372193 A |
217 | XXX New or changed warnings emitted by the core's C<C> code go here. Also |
218 | include any changes in L<perldiag> that reconcile it to the C<C> code. | |
f348c3d8 | 219 | |
86372193 | 220 | =head2 New Diagnostics |
f348c3d8 | 221 | |
86372193 A |
222 | XXX Newly added diagnostic messages go under here, separated into New Errors |
223 | and New Warnings | |
f348c3d8 | 224 | |
86372193 | 225 | =head3 New Errors |
84d03adf | 226 | |
86372193 | 227 | =over 4 |
ff433f2d | 228 | |
4cd408ba TC |
229 | =item * |
230 | ||
86372193 | 231 | XXX L<message|perldiag/"message"> |
f348c3d8 | 232 | |
86372193 | 233 | =back |
f348c3d8 | 234 | |
86372193 | 235 | =head3 New Warnings |
f4eedc6b | 236 | |
86372193 | 237 | =over 4 |
f4eedc6b DD |
238 | |
239 | =item * | |
240 | ||
4475d0d2 | 241 | 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 | 242 | |
ab0b796c KW |
243 | =item * |
244 | ||
8c6180a9 KW |
245 | A new C<locale> warning category has been created, with the following warning |
246 | messages currently in it: | |
247 | ||
248 | =over 4 | |
249 | ||
250 | =item * | |
251 | ||
252 | L<Locale '%s' may not work well.%s|perldiag/Locale '%s' may not work well.%s> | |
253 | ||
254 | =item * | |
255 | ||
ab0b796c KW |
256 | L<Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".|perldiag/Can't do %s("%s") on non-UTF-8 locale; resolved to "%s".> |
257 | ||
86372193 | 258 | =back |
0561e60b | 259 | |
dd200dff FC |
260 | =item * |
261 | ||
262 | L<Warning: unable to close filehandle %s properly: %s|perldiag/"Warning: unable to close filehandle %s properly: %s"> | |
263 | ||
8c6180a9 KW |
264 | =back |
265 | ||
86372193 | 266 | =head2 Changes to Existing Diagnostics |
0561e60b | 267 | |
86372193 | 268 | XXX Changes (i.e. rewording) of diagnostic messages go here |
0561e60b | 269 | |
86372193 | 270 | =over 4 |
4cd408ba | 271 | |
f348c3d8 A |
272 | =item * |
273 | ||
4a328228 FC |
274 | L<Quantifier unexpected on zero-length expression in regex m/%s/|perldiag/"Quantifier unexpected on zero-length expression in regex m/%s/">. |
275 | ||
276 | This message has had the S<"<-- HERE"> marker removed, as it was always | |
277 | placed at the end of the regular expression, regardless of where the | |
278 | problem actually occurred. [perl #122680] | |
4cd408ba | 279 | |
86372193 | 280 | =back |
40a81b59 | 281 | |
86372193 | 282 | =head1 Utility Changes |
f348c3d8 | 283 | |
86372193 A |
284 | XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. |
285 | Most of these are built within the directory F<utils>. | |
f348c3d8 | 286 | |
86372193 A |
287 | [ List utility changes as a =head2 entry for each utility and =item |
288 | entries for each change | |
289 | Use L<XXX> with program names to get proper documentation linking. ] | |
f348c3d8 | 290 | |
86372193 | 291 | =head2 L<XXX> |
f348c3d8 | 292 | |
86372193 | 293 | =over 4 |
f348c3d8 A |
294 | |
295 | =item * | |
296 | ||
86372193 | 297 | XXX |
40a81b59 | 298 | |
13900f93 | 299 | =back |
aac7f82f | 300 | |
86372193 | 301 | =head1 Configuration and Compilation |
2a395b86 | 302 | |
86372193 A |
303 | XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools |
304 | go here. Any other changes to the Perl build process should be listed here. | |
305 | However, any platform-specific changes should be listed in the | |
306 | L</Platform Support> section, instead. | |
8435afd1 | 307 | |
86372193 | 308 | [ List changes as a =item entry ]. |
8435afd1 SH |
309 | |
310 | =over 4 | |
2a395b86 | 311 | |
12d22d1f JK |
312 | =item * |
313 | ||
c517e197 | 314 | F<Configure> with C<-Dmksymlinks> should now be faster. [perl #122002] |
12d22d1f | 315 | |
2a395b86 PM |
316 | =back |
317 | ||
86372193 | 318 | =head1 Testing |
2a395b86 | 319 | |
86372193 A |
320 | XXX Any significant changes to the testing of a freshly built perl should be |
321 | listed here. Changes which create B<new> files in F<t/> go here as do any | |
322 | large changes to the testing harness (e.g. when parallel testing was added). | |
323 | Changes to existing files in F<t/> aren't worth summarizing, although the bugs | |
324 | that they represent may be covered elsewhere. | |
2a395b86 | 325 | |
86372193 | 326 | [ List each test improvement as a =item entry ] |
5cfa0642 | 327 | |
8c8d6154 | 328 | =over 4 |
2a395b86 PM |
329 | |
330 | =item * | |
331 | ||
86372193 | 332 | XXX |
bb8c7e27 | 333 | |
86372193 | 334 | =back |
bb8c7e27 | 335 | |
86372193 | 336 | =head1 Platform Support |
bb8c7e27 | 337 | |
86372193 | 338 | XXX Any changes to platform support should be listed in the sections below. |
bb8c7e27 | 339 | |
86372193 A |
340 | [ Within the sections, list each platform as a =item entry with specific |
341 | changes as paragraphs below it. ] | |
2a395b86 | 342 | |
86372193 | 343 | =head2 New Platforms |
6d9b7c7c | 344 | |
86372193 A |
345 | XXX List any platforms that this version of perl compiles on, that previous |
346 | versions did not. These will either be enabled by new files in the F<hints/> | |
347 | directories, or new subdirectories and F<README> files at the top level of the | |
348 | source tree. | |
363d3025 | 349 | |
8c8d6154 | 350 | =over 4 |
334464b3 | 351 | |
86372193 | 352 | =item XXX-some-platform |
334464b3 | 353 | |
86372193 | 354 | XXX |
ef5a9509 | 355 | |
363d3025 FC |
356 | =back |
357 | ||
86372193 A |
358 | =head2 Discontinued Platforms |
359 | ||
360 | XXX List any platforms that this version of perl no longer compiles on. | |
d72cd2eb | 361 | |
0346c3a9 | 362 | =over 4 |
375f5f06 | 363 | |
86372193 | 364 | =item XXX-some-platform |
2884baee | 365 | |
86372193 | 366 | XXX |
6f1a844b | 367 | |
8c8d6154 | 368 | =back |
549ea8d4 | 369 | |
8c8d6154 | 370 | =head2 Platform-Specific Notes |
aa292ef2 | 371 | |
86372193 A |
372 | XXX List any changes for specific platforms. This could include configuration |
373 | and compilation changes or changes in portability/compatibility. However, | |
374 | changes within modules for platforms should generally be listed in the | |
375 | L</Modules and Pragmata> section. | |
376 | ||
8c8d6154 | 377 | =over 4 |
739e9bee | 378 | |
86372193 | 379 | =item XXX-some-platform |
739e9bee | 380 | |
86372193 | 381 | XXX |
b23b2fdb | 382 | |
8c8d6154 | 383 | =back |
b23b2fdb | 384 | |
83b69bfd DD |
385 | =head3 Win32 |
386 | ||
387 | =over 4 | |
388 | ||
389 | =item * | |
390 | ||
391 | In the experimental C<:win32> layer, a crash in C<open> was fixed. Also | |
392 | opening C</dev/null>, which works the Win32 Perl's normal C<:unix> layer, was | |
393 | implemented for C<:win32>. | |
394 | L<[perl #122224]|https://rt.perl.org/Ticket/Display.html?id=122224> | |
395 | ||
13adb056 SH |
396 | =item * |
397 | ||
398 | A new makefile option, C<USE_LONG_DOUBLE>, has been added to the Windows | |
399 | dmake makefile for gcc builds only. Set this to "define" if you want perl to | |
400 | use long doubles to give more accuracy and range for floating point numbers. | |
401 | ||
83b69bfd DD |
402 | =back |
403 | ||
8c8d6154 | 404 | =head1 Internal Changes |
7d15b1a8 | 405 | |
86372193 A |
406 | XXX Changes which affect the interface available to C<XS> code go here. Other |
407 | significant internal changes for future core maintainers should be noted as | |
408 | well. | |
bbca64cf | 409 | |
86372193 | 410 | [ List each change as a =item entry ] |
6ff8f256 | 411 | |
86372193 | 412 | =over 4 |
28482d6c | 413 | |
28a42920 A |
414 | =item * |
415 | ||
f8d5a522 DD |
416 | C<screaminstr> has been removed. Although marked as public API, it is |
417 | undocumented and has no usage in modern perl versions on CPAN Grep. Calling it | |
418 | has been fatal since 5.17.0. | |
28a42920 | 419 | |
d109137e FC |
420 | =item * |
421 | ||
76acbf4f FC |
422 | C<newDEFSVOP>, C<block_start>, C<block_end> and C<intro_my> have been added |
423 | to the API. | |
d109137e | 424 | |
cff8e04e FC |
425 | =item * |
426 | ||
427 | The internal C<convert> function in F<op.c> has been renamed | |
428 | C<op_convert_list> and added to the API. | |
429 | ||
8c8d6154 | 430 | =back |
6ff8f256 | 431 | |
8c8d6154 | 432 | =head1 Selected Bug Fixes |
80cc3290 | 433 | |
86372193 A |
434 | XXX Important bug fixes in the core language are summarized here. Bug fixes in |
435 | files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. | |
13dd5671 | 436 | |
86372193 | 437 | [ List each fix as a =item entry ] |
bdab7676 | 438 | |
86372193 | 439 | =over 4 |
db98db4e | 440 | |
8818afe8 TC |
441 | =item * |
442 | ||
2ad9844a TC |
443 | fchmod() and futimes() now set C<$!> when they fail due to being |
444 | passed a closed file handle. [perl #122703] | |
bb8c7e27 | 445 | |
9ee757be KW |
446 | =item * |
447 | ||
448 | Perl now comes with a corrected Unicode 7.0 for the erratum issued on | |
449 | October 21, 2014 (see L<http://www.unicode.org/errata/#current_errata>), | |
450 | dealing with glyph shaping in Arabic. | |
451 | ||
c93d2ba1 TC |
452 | =item * |
453 | ||
454 | op_free() no longer crashes due to a stack overflow when freeing a | |
455 | deeply recursive op tree. [perl #108276] | |
456 | ||
53795ef8 FC |
457 | =item * |
458 | ||
9d22ccf6 TC |
459 | scalarvoid() would crash due to a stack overflow when processing a |
460 | deeply recursive op tree. [perl #108276] | |
461 | ||
462 | =item * | |
463 | ||
53795ef8 FC |
464 | In Perl 5.20.0, C<$^N> accidentally had the internal UTF8 flag turned off |
465 | if accessed from a code block within a regular expression, effectively | |
466 | UTF8-encoding the value. This has been fixed. [perl #123135] | |
467 | ||
b7cd8332 FC |
468 | =item * |
469 | ||
470 | A failed C<semctl> call no longer overwrites existing items on the stack, | |
471 | causing C<(semctl(-1,0,0,0))[0]> to give an "uninitialized" warning. | |
472 | ||
480961b6 FC |
473 | =item * |
474 | ||
475 | C<else{foo()}> with no space before C<foo> is now better at assigning the | |
476 | right line number to that statement. [perl #122695] | |
477 | ||
94c9bf90 FC |
478 | =item * |
479 | ||
480 | Sometimes the assignment in C<@array = split> gets optimised and C<split> | |
481 | itself writes directly to the array. This caused a bug, preventing this | |
482 | assignment from being used in lvalue context. So | |
483 | C<(@a=split//,"foo")=bar()> was an error. (This bug probably goes back to | |
484 | Perl 3, when the optimisation was added.) This optimisation, and the bug, | |
485 | started to happen in more cases in 5.21.5. It has now been fixed. | |
486 | [perl #123057] | |
487 | ||
8af808bf FC |
488 | =item * |
489 | ||
490 | When argument lists that fail the checks installed by subroutine | |
491 | signatures, the resulting error messages now give the file and line number | |
492 | of the caller, not of the called subroutine. [perl #121374] | |
493 | ||
fdcaecb7 FC |
494 | =item * |
495 | ||
496 | Flip-flop operators (C<..> and C<...> in scalar context) used to maintain | |
497 | a separate state for each recursion level (the number of times the | |
498 | enclosing sub was called recursively), contrary to the documentation. Now | |
499 | each closure has one internal state for each flip-flop. [perl #122829] | |
500 | ||
2af7c6b6 FC |
501 | =item * |
502 | ||
503 | C<use>, C<no>, statement labels, special blocks (C<BEGIN>) and pod are now | |
504 | permitted as the first thing in a C<map> or C<grep> block, the block after | |
505 | C<print> or C<say> (or other functions) returning a handle, and within | |
506 | C<${...}>, C<@{...}>, etc. [perl #122782] | |
507 | ||
86372193 | 508 | =back |
bb8c7e27 | 509 | |
86372193 | 510 | =head1 Known Problems |
bb8c7e27 | 511 | |
86372193 A |
512 | XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any |
513 | tests that had to be C<TODO>ed for the release would be noted here. Unfixed | |
514 | platform specific bugs also go here. | |
bb8c7e27 | 515 | |
86372193 | 516 | [ List each fix as a =item entry ] |
bb8c7e27 | 517 | |
86372193 | 518 | =over 4 |
bb8c7e27 | 519 | |
74f9f9ed A |
520 | =item * |
521 | ||
eacbb379 DD |
522 | Starting in 5.21.6, accessing L<perlapi/CvPADLIST> in an XSUB is forbidden. |
523 | CvPADLIST has be reused for a different internal purpose for XSUBs. Guard all | |
524 | CvPADLIST expressions with C<CvISXSUB()> if your code doesn't already block | |
525 | XSUB CV*s from going through optree CV* expecting code. | |
28a42920 | 526 | |
86372193 | 527 | =back |
28a42920 | 528 | |
86372193 | 529 | =head1 Errata From Previous Releases |
28a42920 | 530 | |
86372193 | 531 | =over 4 |
28a42920 A |
532 | |
533 | =item * | |
534 | ||
857f4fb1 FC |
535 | Due to a mistake in the string-copying logic, copying the value of a state |
536 | variable could instead steal the value and undefine the variable. This | |
537 | bug, introduced in 5.20, would happen mostly for long strings (1250 chars | |
538 | or more), but could happen for any strings under builds with copy-on-write | |
539 | disabled. [perl #123029] | |
540 | ||
541 | This bug was actually fixed in 5.21.5, but it was not until after that | |
542 | release that this bug, and the fact that it had been fixed, were | |
543 | discovered. | |
28a42920 | 544 | |
8c8d6154 | 545 | =back |
3a085d00 | 546 | |
86372193 | 547 | =head1 Obituary |
01d42a22 | 548 | |
86372193 A |
549 | XXX If any significant core contributor has died, we've added a short obituary |
550 | here. | |
01d42a22 | 551 | |
86372193 | 552 | =head1 Acknowledgements |
01d42a22 | 553 | |
86372193 | 554 | XXX Generate this with: |
01d42a22 | 555 | |
86372193 | 556 | perl Porting/acknowledgements.pl v5.21.5..HEAD |
f5b73711 | 557 | |
44691e6f AB |
558 | =head1 Reporting Bugs |
559 | ||
e08634c5 SH |
560 | If you find what you think is a bug, you might check the articles recently |
561 | posted to the comp.lang.perl.misc newsgroup and the perl bug database at | |
238894db | 562 | https://rt.perl.org/ . There may also be information at |
7ef8b31d | 563 | http://www.perl.org/ , the Perl Home Page. |
44691e6f | 564 | |
e08634c5 SH |
565 | If you believe you have an unreported bug, please run the L<perlbug> program |
566 | included with your release. Be sure to trim your bug down to a tiny but | |
567 | sufficient test case. Your bug report, along with the output of C<perl -V>, | |
568 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. | |
44691e6f AB |
569 | |
570 | If the bug you are reporting has security implications, which make it | |
e08634c5 SH |
571 | inappropriate to send to a publicly archived mailing list, then please send it |
572 | to perl5-security-report@perl.org. This points to a closed subscription | |
573 | unarchived mailing list, which includes all the core committers, who will be | |
574 | able to help assess the impact of issues, figure out a resolution, and help | |
f9001595 | 575 | co-ordinate the release of patches to mitigate or fix the problem across all |
e08634c5 SH |
576 | platforms on which Perl is supported. Please only use this address for |
577 | security issues in the Perl core, not for modules independently distributed on | |
578 | CPAN. | |
44691e6f AB |
579 | |
580 | =head1 SEE ALSO | |
581 | ||
e08634c5 SH |
582 | The F<Changes> file for an explanation of how to view exhaustive details on |
583 | what changed. | |
44691e6f AB |
584 | |
585 | The F<INSTALL> file for how to build Perl. | |
586 | ||
587 | The F<README> file for general stuff. | |
588 | ||
589 | The F<Artistic> and F<Copying> files for copyright information. | |
590 | ||
591 | =cut |