Umherirrender added a comment.
Revsion seems to exists, but `getContent` can return `null` There are revision deletion in the history - https://cs.wikipedia.org/w/index.php?title=Demence&action=history Maybe the revision deletion was done while the revision was open in the editor and than submitted. if ( $baseRevision && $latestRevision ) { // Attempt the automatic merge, to measure the number of actual conflicts. /** @var ThreeWayMerge $merge */ $merge = MediaWikiServices::getInstance()->getService( 'TwoColConflictThreeWayMerge' ); $result = $merge->merge3( $baseRevision->getContent( SlotRecord::MAIN )->serialize(), $latestRevision->getContent( SlotRecord::MAIN )->serialize(), $editPage->textbox2 ); if ( !$result->isCleanMerge() ) { $conflictChunks = $result->getOverlappingChunkCount(); $conflictChars = $result->getOverlappingChunkSize(); } } TASK DETAIL https://phabricator.wikimedia.org/T256293 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Umherirrender Cc: Umherirrender, Aklapper, brennen, Rost_WMDE, Erdinc_Ciftci_WMDE, darthmon_wmde, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Wikidata-bugs, WMDE-Fisch, aude, Lydia_Pintscher, Jdforrester-WMF, Mbch331, Rxy, Jay8g, Krenair
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