T206090: Certain Special:MobileDiff urls fatal with "Bad value for parameter $old: must be a TextContent"

Phabricator Link	T206090
Status	resolved
Priority	high (red)
Author	[1]
Owner	kostajh (Kosta Harlan)
Projects	Readers-Web-Backlog (Tracking) (Backlog) StructuredDiscussions (Backlog) MobileFrontend (MobileFrontend Special Pages) (Backlog) Growth-Team (Current Sprint) (QA) MW-1.33-notes (1.33.0-wmf.4; 2018-11-13) Multi-Content-Revisions (Done) Wikimedia-production-error (Resolved) MediaWiki-Page-History MediaWiki-Page-Diffs (Backlog)
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Related Gerrit Changes:

Change	Subject	Status	Owner	Created	Last Modified	Project
471901	Return false for Flow board diff	MERGED	Kosta Harlan	06 Nov 2018	07 Nov 2018	mediawiki/extensions/Flow