There are a small number of errors (severity 3, level NOTICE) reported in Logstash for:
Cannot access property on non-object in /srv/mediawiki/php-1.31.0-wmf.17/extensions/MobileFrontend/includes/transforms/MoveLeadParagraphTransform.php on line 110
This is likely due to recent changes to the lead paragraph transform.
Given the security level is notice it is not possible to provide URLs where this occurs, but given it's a notice, it's unlikely to be causing any user visible error.
A unit test is very easy to write - $infobox can resolve to false per getInfoboxContainer
- Post SWAT deploy, the error should not appear in the logs.