Seen on https://gerrit.wikimedia.org/r/#/c/mediawiki/skins/WikimediaApiPortal/+/588671/ via https://integration.wikimedia.org/ci/job/quibble-vendor-mysql-php72-docker/67292/console
18:34:29 INFO:mw.maintenance.install:php maintenance/install.php --scriptpath= --server=http://127.0.0.1:9412 --dbtype=mysql --dbname=wikidb --dbuser=wikiuser --dbpass=secret --dbserver=localhost:/workspace/db/quibble-mysql-c_1sbpjn/socket --with-extensions --pass=testwikijenkinspass TestWiki WikiAdmin 18:48:27 18:48:27 mmap() failed: [12] Cannot allocate memory 18:48:27 18:48:27 mmap() failed: [12] Cannot allocate memory 18:48:27 PHP Fatal error: Out of memory (allocated 21854420992) (tried to allocate 20480 bytes) in /workspace/src/includes/registration/ExtensionRegistry.php on line 306
Could be an issue in one of the CI dependancy patches I made