Not every time, of course, but quite frequently the composer-package-php73-docker build will fail on Jenkins while the composer-package-php72-docker passes without problems. The issue is often memory related, for instance
00:00:50.222 > PHAN_DISABLE_XDEBUG_WARN=1 phan --allow-polyfill-parser 00:00:50.258 A future major version of Phan will require php-ast 1.0.1+ for AST version 70. php-ast 0.1.6 is installed. 00:00:50.258 (Set PHAN_SUPPRESS_AST_UPGRADE_NOTICE=1 to suppress this message) 00:01:08.910 [PostBuildScript] - Execution post build scripts.
00:00:25.230 > PHAN_DISABLE_XDEBUG_WARN=1 phan --allow-polyfill-parser 00:00:44.498 00:00:44.498 mmap() failed:  Cannot allocate memory 00:00:44.499 00:00:44.499 mmap() failed:  Cannot allocate memory 00:00:44.499 PHP Fatal error: Out of memory (allocated 1805651968) (tried to allocate 20480 bytes) in /src/vendor/phan/phan/src/Phan/Language/UnionType.php on line 724 00:00:53.961 Script PHAN_DISABLE_XDEBUG_WARN=1 phan --allow-polyfill-parser handling the phan event returned with error code 255
In other cases, like https://integration.wikimedia.org/ci/job/composer-package-php73-docker/3837/console, the php73 job just hangs.