Seen 140 times in the last 24 hours on the beta cluster: https://logstash-beta.wmflabs.org/goto/a22843dafa17db85c26dbe8f9f7a2665
```
counterexample, lines=5, name=Stack trace
#0 /srv/mediawiki/php-master/includes/Revision/SlotRoleRegistry.php(115): MediaWiki\Revision\SlotRoleRegistry->defineRole(string, Closure)
#1 /srv/mediawiki/php-master/extensions/WikibaseMediaInfo/src/WikibaseMediaInfoHooks.php(73): MediaWiki\Revision\SlotRoleRegistry->defineRoleWithModel(string, string)
#2 [internal function]: Wikibase\MediaInfo\WikibaseMediaInfoHooks::Wikibase\MediaInfo\{closure}(MediaWiki\Revision\SlotRoleRegistry, MediaWiki\MediaWikiServices)
#3 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(454): call_user_func_array(Closure, array)
#4 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(416): Wikimedia\Services\ServiceContainer->createService(string)
#5 /srv/mediawiki/php-master/includes/MediaWikiServices.php(1266): Wikimedia\Services\ServiceContainer->getService(string)
#6 /srv/mediawiki/php-master/includes/ServiceWiring.php(1142): MediaWiki\MediaWikiServices->getSlotRoleRegistry()
#7 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer->{closure}(MediaWiki\MediaWikiServices)
#8 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(416): Wikimedia\Services\ServiceContainer->createService(string)
#9 /srv/mediawiki/php-master/includes/MediaWikiServices.php(1201): Wikimedia\Services\ServiceContainer->getService(string)
#10 /srv/mediawiki/php-master/includes/ServiceWiring.php(1124): MediaWiki\MediaWikiServices->getRevisionStoreFactory()
#11 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer->{closure}(MediaWiki\MediaWikiServices)
#12 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(416): Wikimedia\Services\ServiceContainer->createService(string)
#13 /srv/mediawiki/php-master/includes/MediaWikiServices.php(1193): Wikimedia\Services\ServiceContainer->getService(string)
#14 /srv/mediawiki/php-master/includes/ServiceWiring.php(1110): MediaWiki\MediaWikiServices->getRevisionStore()
#15 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer->{closure}(MediaWiki\MediaWikiServices)
#16 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(416): Wikimedia\Services\ServiceContainer->createService(string)
#17 /srv/mediawiki/php-master/includes/MediaWikiServices.php(1177): Wikimedia\Services\ServiceContainer->getService(string)
#18 /srv/mediawiki/php-master/includes/ServiceWiring.php(978): MediaWiki\MediaWikiServices->getRevisionLookup()
#19 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer->{closure}(MediaWiki\MediaWikiServices)
#20 /srv/mediawiki/php-master/vendor/wikimedia/services/src/ServiceContainer.php(416): Wikimedia\Services\ServiceContainer->createService(string)
#21 /srv/mediawiki/php-master/includes/MediaWikiServices.php(1113): Wikimedia\Services\ServiceContainer->getService(string)
#22 /srv/mediawiki/php-master/includes/Rest/EntryPoint.php(46): MediaWiki\MediaWikiServices->getPermissionManager()
#23 /srv/mediawiki/php-master/includes/Rest/EntryPoint.php(108): MediaWiki\Rest\EntryPoint::createRouter(RequestContext, MediaWiki\Rest\RequestFromGlobals, MediaWiki\Rest\ResponseFactory, MediaWiki\Rest\CorsUtils)
#24 /srv/mediawiki/php-master/rest.php(31): MediaWiki\Rest\EntryPoint::main()
#25 /srv/mediawiki/w/rest.php(3): require(string)
#26 {main}
```