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-rw-r--r--synapse/state/v2.py10
1 files changed, 5 insertions, 5 deletions
diff --git a/synapse/state/v2.py b/synapse/state/v2.py
index 531018c6a5..0ffe6d8c14 100644
--- a/synapse/state/v2.py
+++ b/synapse/state/v2.py
@@ -105,7 +105,7 @@ def resolve_events_with_store(
                 % (room_id, event.event_id, event.room_id,)
             )
 
-    full_conflicted_set = set(eid for eid in full_conflicted_set if eid in event_map)
+    full_conflicted_set = {eid for eid in full_conflicted_set if eid in event_map}
 
     logger.debug("%d full_conflicted_set entries", len(full_conflicted_set))
 
@@ -233,7 +233,7 @@ def _get_auth_chain_difference(state_sets, event_map, state_res_store):
 
     auth_sets = []
     for state_set in state_sets:
-        auth_ids = set(
+        auth_ids = {
             eid
             for key, eid in iteritems(state_set)
             if (
@@ -246,9 +246,9 @@ def _get_auth_chain_difference(state_sets, event_map, state_res_store):
                 )
             )
             and eid not in common
-        )
+        }
 
-        auth_chain = yield state_res_store.get_auth_chain(auth_ids)
+        auth_chain = yield state_res_store.get_auth_chain(auth_ids, common)
         auth_ids.update(auth_chain)
 
         auth_sets.append(auth_ids)
@@ -275,7 +275,7 @@ def _seperate(state_sets):
     conflicted_state = {}
 
     for key in set(itertools.chain.from_iterable(state_sets)):
-        event_ids = set(state_set.get(key) for state_set in state_sets)
+        event_ids = {state_set.get(key) for state_set in state_sets}
         if len(event_ids) == 1:
             unconflicted_state[key] = event_ids.pop()
         else: