[17:59:58] ori: TimStarling: If one of you has time for a PHP 7 weirdo challenge – got something at https://phabricator.wikimedia.org/T229433 that might pique your interest. I'm not sure where to go next on this one. My only guess at this point is that there's a bug in PHP 7.2 but, it's not due to string corruption, and it's not deterministic, but doesn't HHVM.