Unflake "Guest user can set display names"

synapse/replication/http/membership.py

@@ -201,6 +201,8 @@ class ReplicationUserJoinedLeftRoomRestServlet(ReplicationEndpoint):
         else:
             raise Exception("Unrecognized change: %r", change)
 
+        self.store.get_latest_event_ids_in_room.invalidate((room_id,))
+
         return 200, {}
 
 

synapse/util/distributor.py

@@ -27,7 +27,6 @@ def user_left_room(distributor, user, room_id):
     distributor.fire("user_left_room", user=user, room_id=room_id)
 
 
-# XXX: this is no longer used. We should probably kill it.
 def user_joined_room(distributor, user, room_id):
     distributor.fire("user_joined_room", user=user, room_id=room_id)