From 3e40bc1d5647988e3541aae848013f3a7778a705 Mon Sep 17 00:00:00 2001
From: Aaron Schulz <aschulz@wikimedia.org>
Date: Sat, 9 Mar 2019 12:27:29 -0800
Subject: [PATCH] Add sanity check to notifyUpdatesForRevision() for $oldRev

Change-Id: Ibd8975efb33d061ab16dc1a59899b6f78976ec5d
---
 includes/jobqueue/jobs/CategoryMembershipChangeJob.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/includes/jobqueue/jobs/CategoryMembershipChangeJob.php b/includes/jobqueue/jobs/CategoryMembershipChangeJob.php
index b64c87aea7..3aedc38f5f 100644
--- a/includes/jobqueue/jobs/CategoryMembershipChangeJob.php
+++ b/includes/jobqueue/jobs/CategoryMembershipChangeJob.php
@@ -195,7 +195,7 @@ class CategoryMembershipChangeJob extends Job {
 		// Get the prior revision (the same for null edits)
 		if ( $newRev->getParentId() ) {
 			$oldRev = Revision::newFromId( $newRev->getParentId(), Revision::READ_LATEST );
-			if ( !$oldRev->getContent() ) {
+			if ( !$oldRev || !$oldRev->getContent() ) {
 				return; // deleted?
 			}
 		} else {
-- 
2.20.1