$t = Title::newFromText( $search, $ns );
			$string = $t->getPrefixedText();

	 * @return Title|null Title or null on an error.

I guess newFromText() is returning null...

gerritadmin wrote:

Change 167603 had a related patch set uploaded by Manybubbles:
Fix exception while bubbling titles

https://gerrit.wikimedia.org/r/167603

gerritadmin wrote:

Change 167603 merged by jenkins-bot:
Fix exception while bubbling titles

https://gerrit.wikimedia.org/r/167603

Thanks, I'll reopen if seen again.

gerritadmin wrote:

Change 167982 had a related patch set uploaded by MaxSem:
Fix exception while bubbling titles

https://gerrit.wikimedia.org/r/167982

gerritadmin wrote:

Change 167982 merged by MaxSem:
Fix exception while bubbling titles

https://gerrit.wikimedia.org/r/167982