```name=normalized_message
[YDfYKVHPfO8owc0sdU7T2AAAAMQ] /wiki/Special:AbuseFilter/test Error: Class 'StructuredDiscussions\Hooks\AbuseFilterHandler' not found
```
```lines=10,name=exception.trace
from /srv/mediawiki/php-1.36.0-wmf.32/vendor/wikimedia/object-factory/src/ObjectFactory.php(244)
#0 /srv/mediawiki/php-1.36.0-wmf.32/vendor/wikimedia/object-factory/src/ObjectFactory.php(150): Wikimedia\ObjectFactory::getObjectFromSpec(array, array)
#1 /srv/mediawiki/php-1.36.0-wmf.32/includes/HookContainer/HookContainer.php(468): Wikimedia\ObjectFactory->createObject(array)
#2 /srv/mediawiki/php-1.36.0-wmf.32/includes/HookContainer/HookContainer.php(159): MediaWiki\HookContainer\HookContainer->getHandlers(string, array)
#3 /srv/mediawiki/php-1.36.0-wmf.32/extensions/AbuseFilter/includes/Hooks/AbuseFilterHookRunner.php(173): MediaWiki\HookContainer\HookContainer->run(string, array)
#4 /srv/mediawiki/php-1.36.0-wmf.32/extensions/AbuseFilter/includes/VariableGenerator/RCVariableGenerator.php(85): MediaWiki\Extension\AbuseFilter\Hooks\AbuseFilterHookRunner->onAbuseFilterGenerateVarsForRecentChange(MediaWiki\Extension\AbuseFilter\VariableGenerator\RCVariableGenerator, RecentChange, MediaWiki\Extension\AbuseFilter\Variables\VariableHolder, User)
#5 /srv/mediawiki/php-1.36.0-wmf.32/extensions/AbuseFilter/includes/View/AbuseFilterViewTestBatch.php(309): MediaWiki\Extension\AbuseFilter\VariableGenerator\RCVariableGenerator->getVars()
#6 /srv/mediawiki/php-1.36.0-wmf.32/extensions/AbuseFilter/includes/View/AbuseFilterViewTestBatch.php(210): MediaWiki\Extension\AbuseFilter\View\AbuseFilterViewTestBatch->doTest()
#7 /srv/mediawiki/php-1.36.0-wmf.32/extensions/AbuseFilter/includes/Special/SpecialAbuseFilter.php(162): MediaWiki\Extension\AbuseFilter\View\AbuseFilterViewTestBatch->show()
#8 /srv/mediawiki/php-1.36.0-wmf.32/includes/specialpage/SpecialPage.php(645): MediaWiki\Extension\AbuseFilter\Special\SpecialAbuseFilter->execute(string)
#9 /srv/mediawiki/php-1.36.0-wmf.32/includes/specialpage/SpecialPageFactory.php(1405): SpecialPage->run(string)
#10 /srv/mediawiki/php-1.36.0-wmf.32/includes/MediaWiki.php(310): MediaWiki\SpecialPage\SpecialPageFactory->executePath(Title, RequestContext)
#11 /srv/mediawiki/php-1.36.0-wmf.32/includes/MediaWiki.php(944): MediaWiki->performRequest()
#12 /srv/mediawiki/php-1.36.0-wmf.32/includes/MediaWiki.php(548): MediaWiki->main()
#13 /srv/mediawiki/php-1.36.0-wmf.32/index.php(53): MediaWiki->run()
#14 /srv/mediawiki/php-1.36.0-wmf.32/index.php(46): wfIndexMain()
#15 /srv/mediawiki/w/index.php(3): require(string)
#16 {main}
```
##### Impact
Cannot test filters under some specific circumstances. I suspect this is because of Flow integration (T115128).
##### Notes
Can be reproduced on [[ https://www.wikidata.org/wiki/Special:AbuseFilter/test | Wikidata ]]. Inputs:
- conditions: `1==1`
- user: `VIGNERON`
- after: `20210225140000`
- before: `20210225150000`