Thread:Extension talk:UserMerge/Mediawiki 1.22/reply

please indicate the version of the UserMerge extension, and/or upgrade your MediaWiki to trunk.

I just saw, that a commit https://git.wikimedia.org/commitdiff/mediawiki%2Fextensions%2FUserMerge.git/d5a37fcbe8f18bf38506ecc7aeaa62a7a404c613 changed that line in UserMerge from getTitle to getPageTitle, which apparently requires a recent MediaWiki master version.

This requirement should be documented, of course.

So either you downgrade the UserMerge extension, or you upgrade your MediaWiki core. If the problem persists, please file a regular bugzilla in https://bugzilla.wikimedia.org/enter_bug.cgi?product=MediaWiki%20extensions&component=UserMerge.