Bug #81298 [Ver]: Core dump on PHP 8.1

Edit report at https://bugs.php.net/bug.php?id=81298&edit=1 ID: 81298 Updated by: nikic@php.net Reported by: alec@php.net Summary: Core dump on PHP 8.1 Status: Verified Type: Bug Package: Reproducible crash Operating System: Linux PHP Version: 8.1Git-2021-07-26 (Git) Block user comment: N Private report: N New Comment: Reduced: var_dump(mb_detect_encoding("foobar", "7bit")); Previous Comments: ------------------------------------------------------------------------ [2021-07-28 07:58:14] nikic@php.net Program received signal SIGSEGV, Segmentation fault. 0x0000555555a8b584 in mbfl_encoding_detector_new (elist=0x7ffff14f6600, elistsz=81, strict=0) at /home/nikic/php/php-src/ext/mbstring/libmbfl/mbfl/mbfilter.c:321 321 identd->filter_list[i]->opaque = (void*)0; (gdb) bt #0 0x0000555555a8b584 in mbfl_encoding_detector_new (elist=0x7ffff14f6600, elistsz=81, strict=0) at /home/nikic/php/php-src/ext/mbstring/libmbfl/mbfl/mbfilter.c:321 #1 0x0000555555a8ba63 in mbfl_identify_encoding (string=0x7fffffffa200, elist=0x7ffff14f6600, elistsz=81, strict=0) at /home/nikic/php/php-src/ext/mbstring/libmbfl/mbfl/mbfilter.c:460 #2 0x0000555555a62097 in zif_mb_detect_encoding (execute_data=0x7ffff341c9d0, return_value=0x7ffff341c990) at /home/nikic/php/php-src/ext/mbstring/mbstring.c:2719 ------------------------------------------------------------------------ [2021-07-26 10:39:14] cmb@php.net Working link: <https://github.com/roundcube/roundcubemail/runs/3159640942?check_suite_focus=true>. ------------------------------------------------------------------------ [2021-07-26 09:13:19] alec@php.net Description: ------------ Sorry for incomplete information. I hope someone could help me to find out more about this issue. For https://github.com/roundcube/roundcubemail I just enabled Github Actions tests on PHP 8.1 and I got a core dump. I'm not sure this is Github or PHP's segfault. I do not have a local PHP 8.1 installation to test with yet, so maybe someone would like to run the tests locally to verify. Here's the raw log from the GA run: https://pipelines.actions.githubusercontent.com/u0loR6uBKIBHqKHhv0hTP4yFrcdLnLzpWEg6qJMnMYCKI8ovYJ/_apis/pipelines/1/runs/418/signedlogcontent/6?urlExpires=2021-07-26T09%3A11%3A08.4028855Z&urlSigningMethod=HMACV1&urlSignature=jdCF19d3rUDCj%2FFF66ORYaUssVkTBh1vJpkIe3ey1yY%3D ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81298&edit=1