2015-07-30 08:24:21 mw1053 wikidatawiki exception ERROR: [0e4f9934] /wiki/Special:WhatLinksHere/Wikidata:Tools Flow\Exception\CatchableFatalErrorException from line 35 of /srv/mediawiki/php-1.26wmf16/extensions/Flow/includes/Model/WikiReference.php: Argument 6 passed to Flow\Model\WikiReference::__construct() must be an instance of Title, null given {"exception":"[object] (Flow\\Exception\\CatchableFatalErrorException(code: 0): Argument 6 passed to Flow\\Model\\WikiReference::__construct() must be an instance of Title, null given at /srv/mediawiki/php-1.26wmf16/extensions/Flow/includes/Model/WikiReference.php:35)"}
This seems to be a problem caused by https://gerrit.wikimedia.org/r/#/c/213348/