Fix None check in backfill

matrix-org · Aug 25, 2016 · cd5b264 · cd5b264
1 parent eb6a7cf
commit cd5b264
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
@@ -377,7 +377,9 @@ def backfill(self, dest, room_id, limit, extremities):
                 )).addErrback(unwrapFirstError)
                 auth_events.update({a.event_id: a for a in results if a})
                 required_auth.update(
-                    a_id for event in results for a_id, _ in event.auth_events if event
+                    a_id
+                    for event in results if event
+                    for a_id, _ in event.auth_events
                 )
                 missing_auth = required_auth - set(auth_events)