==== Error ====
mediawiki_job_update_special_pages crashes on multiple sections with the following error
```name=message
[8489dc6219d957a20272c86b] [no req] Error: Class 'Wikimedia\Rdbms\SubQuery' not found
```
```name=trace,lines=10
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: ValidationStatistics [callback] [8489dc6219d957a20272c86b] [no req] Error: Class 'Wikimedia\Rdbms\SubQuery' not found
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: Backtrace:
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: from /srv/mediawiki/php-1.43.0-wmf.4/extensions/FlaggedRevs/includes/backend/FlaggedRevsStats.php(424)
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #0 /srv/mediawiki/php-1.43.0-wmf.4/extensions/FlaggedRevs/includes/backend/FlaggedRevsStats.php(99): FlaggedRevsStats::getEditReviewTimes(MemcachedPeclBagOStuff, string)
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #1 /srv/mediawiki/php-1.43.0-wmf.4/maintenance/updateSpecialPages.php(163): FlaggedRevsStats::updateCache(Wikimedia\Rdbms\DBConnRef)
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #2 /srv/mediawiki/php-1.43.0-wmf.4/maintenance/updateSpecialPages.php(50): UpdateSpecialPages->doSpecialPageCacheUpdates(Wikimedia\Rdbms\DBConnRef)
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #3 /srv/mediawiki/php-1.43.0-wmf.4/maintenance/includes/MaintenanceRunner.php(696): UpdateSpecialPages->execute()
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #4 /srv/mediawiki/php-1.43.0-wmf.4/maintenance/run.php(51): MediaWiki\Maintenance\MaintenanceRunner->run()
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #5 /srv/mediawiki/multiversion/MWScript.php(158): require_once(string)
May 15 10:10:22 mwmaint1002 mediawiki_job_update_special_pages_s5[21728]: #6 {main}
```
==== Impact ====
Most of the impacted sections wikis don't have their special QueryPages updated
Sections:
- s2 (crashes on eowiki)
- s3 (crashes on alswiki)
- s5 (crashes on dewiki_
- s6 (crashes on ruwiki)
- s7 (crashes on arwiki)
==== Notes ====