| 1 | =encoding utf8 |
| 2 | |
| 3 | =head1 NAME |
| 4 | |
| 5 | perl5311delta - what is new for perl v5.31.1 |
| 6 | |
| 7 | =head1 DESCRIPTION |
| 8 | |
| 9 | This document describes differences between the 5.31.0 release and the 5.31.1 |
| 10 | release. |
| 11 | |
| 12 | If you are upgrading from an earlier release such as 5.30.0, first read |
| 13 | L<perl5310delta>, which describes differences between 5.30.0 and 5.31.0. |
| 14 | |
| 15 | =head1 Incompatible Changes |
| 16 | |
| 17 | =head2 Use of L<C<vec>|perlfunc/vec EXPR,OFFSET,BITS> on strings with code points above 0xFF is forbidden |
| 18 | |
| 19 | Such strings are represented internally in UTF-8, and C<vec> is a |
| 20 | bit-oriented operation that will likely give unexpected results on those |
| 21 | strings. This was deprecated in perl 5.28.0. |
| 22 | |
| 23 | =head2 Use of code points over 0xFF in string bitwise operators |
| 24 | |
| 25 | Some uses of these were already illegal after a previous deprecation |
| 26 | cycle. The remaining uses are now prohibited, having been deprecated in perl |
| 27 | 5.28.0. See L<perldeprecation>. |
| 28 | |
| 29 | =head2 C<Sys::Hostname::hostname()> does not accept arguments |
| 30 | |
| 31 | This usage was deprecated in perl 5.28.0 and is now fatal. |
| 32 | |
| 33 | =head1 Modules and Pragmata |
| 34 | |
| 35 | =head2 Updated Modules and Pragmata |
| 36 | |
| 37 | =over 4 |
| 38 | |
| 39 | =item * |
| 40 | |
| 41 | L<Class::Struct> has been upgraded from version 0.65 to 0.66. |
| 42 | |
| 43 | =item * |
| 44 | |
| 45 | L<Compress::Raw::Bzip2> has been upgraded from version 2.084 to 2.086. |
| 46 | |
| 47 | =item * |
| 48 | |
| 49 | L<Compress::Raw::Zlib> has been upgraded from version 2.084 to 2.086. |
| 50 | |
| 51 | =item * |
| 52 | |
| 53 | L<CPAN> has been upgraded from version 2.22 to 2.27. |
| 54 | |
| 55 | =item * |
| 56 | |
| 57 | L<DB_File> has been upgraded from version 1.843 to 1.852. |
| 58 | |
| 59 | =item * |
| 60 | |
| 61 | L<Devel::PPPort> has been upgraded from version 3.52 to 3.53. |
| 62 | |
| 63 | =item * |
| 64 | |
| 65 | L<ExtUtils::CBuilder> has been upgraded from version 0.280231 to 0.280232. |
| 66 | |
| 67 | =item * |
| 68 | |
| 69 | L<ExtUtils::MakeMaker> has been upgraded from version 7.34 to 7.36. |
| 70 | |
| 71 | =item * |
| 72 | |
| 73 | L<I18N::LangTags> has been upgraded from version 0.43 to 0.44. |
| 74 | |
| 75 | =item * |
| 76 | |
| 77 | L<IO> has been upgraded from version 1.40 to 1.41. |
| 78 | |
| 79 | The supplied I<TO> is now always honoured on calls to the send() |
| 80 | method. L<[perl #133936]|https://rt.perl.org/Ticket/Display.html?id=133936> |
| 81 | |
| 82 | =item * |
| 83 | |
| 84 | L<IO::Compress> has been upgraded from version 2.084 to 2.086. |
| 85 | |
| 86 | =item * |
| 87 | |
| 88 | L<Module::CoreList> has been upgraded from version 5.20190524 to 5.20190620. |
| 89 | |
| 90 | =item * |
| 91 | |
| 92 | L<overload> has been upgraded from version 1.30 to 1.31. |
| 93 | |
| 94 | =item * |
| 95 | |
| 96 | L<Pod::Simple> has been upgraded from version 3.36 to 3.38. |
| 97 | |
| 98 | =item * |
| 99 | |
| 100 | L<podlators> has been upgraded from version 4.11 to 4.12. |
| 101 | |
| 102 | =item * |
| 103 | |
| 104 | L<POSIX> has been upgraded from version 1.88 to 1.89. |
| 105 | |
| 106 | =item * |
| 107 | |
| 108 | L<SelfLoader> has been upgraded from version 1.25 to 1.26. |
| 109 | |
| 110 | =item * |
| 111 | |
| 112 | L<Storable> has been upgraded from version 3.15 to 3.16. |
| 113 | |
| 114 | Regular expressions objects weren't properly counted for object id |
| 115 | purposes on retrieve. This would corrupt the resulting structure, or |
| 116 | cause a runtime error in some cases. L<[perl #134179]|https://rt.perl.org/Ticket/Display.html?id=134179> |
| 117 | |
| 118 | =item * |
| 119 | |
| 120 | L<Sys::Hostname> has been upgraded from version 1.22 to 1.23. |
| 121 | |
| 122 | =item * |
| 123 | |
| 124 | L<Test::Simple> has been upgraded from version 1.302162 to 1.302164. |
| 125 | |
| 126 | =item * |
| 127 | |
| 128 | L<Tie::File> has been upgraded from version 1.02 to 1.03. |
| 129 | |
| 130 | =item * |
| 131 | |
| 132 | L<Tie::Hash::NamedCapture> has been upgraded from version 0.10 to 0.11. |
| 133 | |
| 134 | =item * |
| 135 | |
| 136 | L<Time::HiRes> has been upgraded from version 1.9760 to 1.9761. |
| 137 | |
| 138 | =item * |
| 139 | |
| 140 | L<Unicode::Normalize> has been upgraded from version 1.26 to 1.27. |
| 141 | |
| 142 | =item * |
| 143 | |
| 144 | L<Unicode::UCD> has been upgraded from version 0.72 to 0.73. |
| 145 | |
| 146 | =item * |
| 147 | |
| 148 | L<warnings> has been upgraded from version 1.44 to 1.45. |
| 149 | |
| 150 | =item * |
| 151 | |
| 152 | L<XS::APItest> has been upgraded from version 1.00 to 1.01. |
| 153 | |
| 154 | =back |
| 155 | |
| 156 | =head2 Removed Modules and Pragmata |
| 157 | |
| 158 | =over 4 |
| 159 | |
| 160 | =item * |
| 161 | |
| 162 | Pod::Parser has been removed from the core distribution. |
| 163 | It still is available for download from CPAN. This resolves L<[perl |
| 164 | #119439]|https://rt.perl.org/Ticket/Display.html?id=119439>. |
| 165 | |
| 166 | =back |
| 167 | |
| 168 | =head1 Documentation |
| 169 | |
| 170 | =head2 Changes to Existing Documentation |
| 171 | |
| 172 | We have attempted to update the documentation to reflect the changes |
| 173 | listed in this document. If you find any we have missed, send email |
| 174 | to L<perlbug@perl.org|mailto:perlbug@perl.org>. |
| 175 | |
| 176 | Additionally, the following selected changes have been made: |
| 177 | |
| 178 | =head3 L<perlguts> |
| 179 | |
| 180 | =over 4 |
| 181 | |
| 182 | =item * |
| 183 | |
| 184 | Documentation about embed.fnc flags has been removed. F<embed.fnc> now has |
| 185 | sufficient comments within it. Anyone changing that file will see those |
| 186 | comments first, so entries here are now redundant. |
| 187 | |
| 188 | =back |
| 189 | |
| 190 | =head3 L<perlpod> |
| 191 | |
| 192 | =over 4 |
| 193 | |
| 194 | =item * |
| 195 | |
| 196 | Advice has been added regarding the usage of C<< ZE<lt>E<gt> >>. |
| 197 | |
| 198 | =back |
| 199 | |
| 200 | =head1 Configuration and Compilation |
| 201 | |
| 202 | =over 4 |
| 203 | |
| 204 | =item * |
| 205 | |
| 206 | F<autodoc.pl> |
| 207 | |
| 208 | This tool that regenerates L<perlintern> and L<perlapi> has been overhauled |
| 209 | significantly, restoring consistency in flags used in F<embed.fnc> and |
| 210 | L<Devel::PPPort> and allowing removal of many redundant C<=for apidoc> |
| 211 | entries in code. |
| 212 | |
| 213 | =back |
| 214 | |
| 215 | =head1 Platform Support |
| 216 | |
| 217 | =head2 Discontinued Platforms |
| 218 | |
| 219 | =over 4 |
| 220 | |
| 221 | =item Windows CE |
| 222 | |
| 223 | Support for building perl on Windows CE has now been removed. |
| 224 | |
| 225 | =back |
| 226 | |
| 227 | =head1 Internal Changes |
| 228 | |
| 229 | =over 4 |
| 230 | |
| 231 | =item * |
| 232 | |
| 233 | L<eval_pv()|perlapi/eval_pv> no longer stringifies the exception when |
| 234 | C<croak_on_error> is true. L<[perl #134175]|https://rt.perl.org/Ticket/Display.html?id=134175> |
| 235 | |
| 236 | =back |
| 237 | |
| 238 | =head1 Selected Bug Fixes |
| 239 | |
| 240 | =over 4 |
| 241 | |
| 242 | =item * |
| 243 | |
| 244 | Setting C<$)> now properly sets supplementary group ids if you have |
| 245 | the necessary privileges. L<[perl #134169]|https://rt.perl.org/Ticket/Display.html?id=134169> |
| 246 | |
| 247 | =item * |
| 248 | |
| 249 | close() on a pipe now preemptively clears the PerlIO object from the |
| 250 | IO SV. This prevents a second attempt to close the already closed |
| 251 | PerlIO object if a signal handler calls die() or exit() while close() |
| 252 | is waiting for the child process to complete. L<[perl #122112]|https://rt.perl.org/Ticket/Display.html?id=122112> |
| 253 | |
| 254 | =item * |
| 255 | |
| 256 | C<< sprintf("%.*a", -10000, $x) >> would cause a buffer overflow due |
| 257 | to mishandling of the negative precision value. L<[perl #134008]|https://rt.perl.org/Ticket/Display.html?id=134008> |
| 258 | |
| 259 | =item * |
| 260 | |
| 261 | scalar() on a reference could cause an erroneous assertion failure |
| 262 | during compilation. L<[perl #134045]|https://rt.perl.org/Ticket/Display.html?id=134045> |
| 263 | |
| 264 | =item * |
| 265 | |
| 266 | C<%{^CAPTURE_ALL}> is now an alias to C<%-> as documented, rather than |
| 267 | incorrectly an alias for C<%+>. L<[perl #131867]|https://rt.perl.org/Ticket/Display.html?id=131867> |
| 268 | |
| 269 | =item * |
| 270 | |
| 271 | C<%{^CAPTURE}> didn't work if C<@{^CAPTURE}> was mentioned first. |
| 272 | Similarly for C<%{^CAPTURE_ALL}> and C<@{^CAPTURE_ALL}>, though |
| 273 | C<@{^CAPTURE_ALL}> currently isn't used. L<[perl #131193]|https://rt.perl.org/Ticket/Display.html?id=131193> |
| 274 | |
| 275 | =item * |
| 276 | |
| 277 | Extraordinarily large (over 2GB) floating point format widths could |
| 278 | cause an integer overflow in the underlying call to snprintf(), |
| 279 | resulting in an assertion. Formatted floating point widths are now |
| 280 | limited to the range of int, the return value of snprintf(). L<[perl |
| 281 | #133913]|https://rt.perl.org/Ticket/Display.html?id=133913> |
| 282 | |
| 283 | =item * |
| 284 | |
| 285 | Parsing the following constructs within a sub-parse (such as with |
| 286 | C<"${code here}"> or C<s/.../code here/e>) has changed to match how |
| 287 | they're parsed normally: |
| 288 | |
| 289 | =over |
| 290 | |
| 291 | =item * |
| 292 | |
| 293 | C<print $fh ...> no longer produces a syntax error. |
| 294 | |
| 295 | =item * |
| 296 | |
| 297 | Code like C<s/.../ ${time} /e> now properly produces an "Ambiguous use |
| 298 | of ${time} resolved to $time at ..." warning when warnings are enabled. |
| 299 | |
| 300 | =item * |
| 301 | |
| 302 | C<@x {"a"}> (with the space) in a sub-parse now properly produces a |
| 303 | "better written as" warning when warnings are enabled. |
| 304 | |
| 305 | =item * |
| 306 | |
| 307 | attributes can now be used in a sub-parse. |
| 308 | |
| 309 | =back |
| 310 | |
| 311 | L<[perl #133850]|https://rt.perl.org/Ticket/Display.html?id=133850> |
| 312 | |
| 313 | =item * |
| 314 | |
| 315 | Incomplete hex and binary literals like C<0x> and C<0b> are now |
| 316 | treated as if the C<x> or C<b> is part of the next token. L<[perl |
| 317 | #134125]|https://rt.perl.org/Ticket/Display.html?id=134125> |
| 318 | |
| 319 | =item * |
| 320 | |
| 321 | A spurious C<)> in a subparse, such as in C<s/.../code here/e> or |
| 322 | C<"...${code here}">, no longer confuses the parser. |
| 323 | |
| 324 | Previously a subparse was bracketed with generated C<(> and C<)> |
| 325 | tokens, so a spurious C<)> would close the construct without doing the |
| 326 | normal subparse clean up, confusing the parser and possible causing an |
| 327 | assertion failure. |
| 328 | |
| 329 | Such constructs are now surrounded by artificial tokens that can't be |
| 330 | included in the source. L<[perl #130585]|https://rt.perl.org/Ticket/Display.html?id=130585> |
| 331 | |
| 332 | =item * |
| 333 | |
| 334 | Reference assignment of a sub, such as C<\&foo = \&bar;>, silently did |
| 335 | nothing in the C<main::> package. L<[perl #134072]|https://rt.perl.org/Ticket/Display.html?id=134072> |
| 336 | |
| 337 | =item * |
| 338 | |
| 339 | sv_gets() now recovers better if the target SV is modified by a signal |
| 340 | handler. L<[perl #134035]|https://rt.perl.org/Ticket/Display.html?id=134035> |
| 341 | |
| 342 | =item * |
| 343 | |
| 344 | C<readline @foo> now evaluates C<@foo> in scalar context. Previously |
| 345 | it would be evalauted in list context, and since readline() pops only |
| 346 | one argument from the stack, the stack could underflow, or be left |
| 347 | with unexpected values on the stack. L<[perl #133989]|https://rt.perl.org/Ticket/Display.html?id=133989> |
| 348 | |
| 349 | =back |
| 350 | |
| 351 | =head1 Acknowledgements |
| 352 | |
| 353 | Perl 5.31.1 represents approximately 4 weeks of development since Perl |
| 354 | 5.31.0 and contains approximately 37,000 lines of changes across 500 files |
| 355 | from 20 authors. |
| 356 | |
| 357 | Excluding auto-generated files, documentation and release tools, there were |
| 358 | approximately 19,000 lines of changes to 340 .pm, .t, .c and .h files. |
| 359 | |
| 360 | Perl continues to flourish into its fourth decade thanks to a vibrant |
| 361 | community of users and developers. The following people are known to have |
| 362 | contributed the improvements that became Perl 5.31.1: |
| 363 | |
| 364 | Alexandr Savca, Andreas König, Chris 'BinGOs' Williams, Dagfinn Ilmari |
| 365 | Mannsåker, Dominic Hargreaves, Graham Knop, Hugo van der Sanden, James E |
| 366 | Keenan, Jerome Duval, Karen Etheridge, Karl Williamson, Manuel Mausz, |
| 367 | Michael Haardt, Nicolas R., Pali, Richard Leach, Sawyer X, Steve Hay, Tony |
| 368 | Cook, Vickenty Fesunov. |
| 369 | |
| 370 | The list above is almost certainly incomplete as it is automatically |
| 371 | generated from version control history. In particular, it does not include |
| 372 | the names of the (very much appreciated) contributors who reported issues to |
| 373 | the Perl bug tracker. |
| 374 | |
| 375 | Many of the changes included in this version originated in the CPAN modules |
| 376 | included in Perl's core. We're grateful to the entire CPAN community for |
| 377 | helping Perl to flourish. |
| 378 | |
| 379 | For a more complete list of all of Perl's historical contributors, please |
| 380 | see the F<AUTHORS> file in the Perl source distribution. |
| 381 | |
| 382 | =head1 Reporting Bugs |
| 383 | |
| 384 | If you find what you think is a bug, you might check the perl bug database |
| 385 | at L<https://rt.perl.org/>. There may also be information at |
| 386 | L<http://www.perl.org/>, the Perl Home Page. |
| 387 | |
| 388 | If you believe you have an unreported bug, please run the L<perlbug> program |
| 389 | included with your release. Be sure to trim your bug down to a tiny but |
| 390 | sufficient test case. Your bug report, along with the output of C<perl -V>, |
| 391 | will be sent off to perlbug@perl.org to be analysed by the Perl porting team. |
| 392 | |
| 393 | If the bug you are reporting has security implications which make it |
| 394 | inappropriate to send to a publicly archived mailing list, then see |
| 395 | L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION> |
| 396 | for details of how to report the issue. |
| 397 | |
| 398 | =head1 Give Thanks |
| 399 | |
| 400 | If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, |
| 401 | you can do so by running the C<perlthanks> program: |
| 402 | |
| 403 | perlthanks |
| 404 | |
| 405 | This will send an email to the Perl 5 Porters list with your show of thanks. |
| 406 | |
| 407 | =head1 SEE ALSO |
| 408 | |
| 409 | The F<Changes> file for an explanation of how to view exhaustive details on |
| 410 | what changed. |
| 411 | |
| 412 | The F<INSTALL> file for how to build Perl. |
| 413 | |
| 414 | The F<README> file for general stuff. |
| 415 | |
| 416 | The F<Artistic> and F<Copying> files for copyright information. |
| 417 | |
| 418 | =cut |