Choose state algorithm based on room version

2 files changed, 9 insertions, 4 deletions

diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py

index 0dffd44e22..75a819dd11 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -274,8 +274,9 @@ class FederationHandler(BaseHandler):
                             ev_ids, get_prev_content=False, check_redacted=False
                         )
 
+                    room_version = yield self.store.get_room_version(pdu.room_id)
                     state_map = yield resolve_events_with_factory(
-                        state_groups, {pdu.event_id: pdu}, fetch
+                        room_version, state_groups, {pdu.event_id: pdu}, fetch
                     )
 
                     state = (yield self.store.get_events(state_map.values())).values()
@@ -1811,7 +1812,10 @@ class FederationHandler(BaseHandler):
                     (d.type, d.state_key): d for d in different_events if d
                 })
 
-                new_state = self.state_handler.resolve_events(
+                room_version = yield self.store.get_room_version(event.room_id)
+
+                new_state = yield self.state_handler.resolve_events(
+                    room_version,
                     [list(local_view.values()), list(remote_view.values())],
                     event
                 )
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py

index 0d4a3f4677..b6010bb41e 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -341,9 +341,10 @@ class RoomMemberHandler(object):
         prev_events_and_hashes = yield self.store.get_prev_events_for_room(
             room_id,
         )
-        latest_event_ids = (
+        latest_event_ids = [
             event_id for (event_id, _, _) in prev_events_and_hashes
-        )
+        ]
+
         current_state_ids = yield self.state_handler.get_current_state_ids(
             room_id, latest_event_ids=latest_event_ids,
         )