Hi, I saw this:
Oct 29 08:09:34 mwtask141 kernel: [124675.764099] php[988430]: segfault at 7fd0377c2cf0 ip 00007fd0377c2cf0 sp 00007fd032ffec08 error 14 in libnss_files-2.31.so[7fd0377d3000+3000] Oct 29 08:09:34 mwtask141 kernel: [124675.764128] Code: Unable to access opcode bytes at RIP 0x7fd0377c2cc6. Oct 29 08:09:34 mwtask141 jobrunner[589261]: 2022-10-29T08:09:34+0000 ERROR: Runner loop 0 process in slot 0 gave status '139': Oct 29 08:09:34 mwtask141 jobrunner[589261]: php /srv/mediawiki/w/maintenance/runJobs.php --wiki='constantnoblewiki' --type='refreshLinks' --maxtime='30' --memory-limit='500M' --maxjobs 1 --result=json STDERR: Oct 29 08:09:34 mwtask141 jobrunner[589261]: #011Segmentation fault ..... Oct 29 08:22:08 mwtask141 kernel: [125430.159906] php[1007797]: segfault at 7f94e9b7fcf0 ip 00007f94e9b7fcf0 sp 00007f94e55fec08 error 14 Oct 29 08:22:08 mwtask141 kernel: [125430.159919] Code: Unable to access opcode bytes at RIP 0x7f94e9b7fcc6. Oct 29 08:22:08 mwtask141 jobrunner[589261]: 2022-10-29T08:22:08+0000 ERROR: Runner loop 0 process in slot 0 gave status '139': Oct 29 08:22:08 mwtask141 jobrunner[589261]: php /srv/mediawiki/w/maintenance/runJobs.php --wiki='constantnoblewiki' --type='refreshLinks' --maxtime='60' --memory-limit='500M' --maxjobs 1 --result=json STDERR: Oct 29 08:22:08 mwtask141 jobrunner[589261]: #011Segmentation fault
I'm not exactly sure how to reproduce it though.
Running mediawiki 1.38 and php 7.4 (on debian bullseye).