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-rw-r--r--synapse/handlers/sync.py12
1 files changed, 8 insertions, 4 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index f50257cd57..ee607e6e65 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -80,7 +80,7 @@ class SyncConfig:
     filter_collection = attr.ib(type=FilterCollection)
     is_guest = attr.ib(type=bool)
     request_key = attr.ib(type=Tuple[Any, ...])
-    device_id = attr.ib(type=str)
+    device_id = attr.ib(type=Optional[str])
 
 
 @attr.s(slots=True, frozen=True)
@@ -723,7 +723,9 @@ class SyncHandler:
 
         return summary
 
-    def get_lazy_loaded_members_cache(self, cache_key: Tuple[str, str]) -> LruCache:
+    def get_lazy_loaded_members_cache(
+        self, cache_key: Tuple[str, Optional[str]]
+    ) -> LruCache:
         cache = self.lazy_loaded_members_cache.get(cache_key)
         if cache is None:
             logger.debug("creating LruCache for %r", cache_key)
@@ -1979,8 +1981,10 @@ class SyncHandler:
 
             logger.info("User joined room after current token: %s", room_id)
 
-            extrems = await self.store.get_forward_extremeties_for_room(
-                room_id, event_pos.stream
+            extrems = (
+                await self.store.get_forward_extremities_for_room_at_stream_ordering(
+                    room_id, event_pos.stream
+                )
             )
             users_in_room = await self.state.get_current_users_in_room(room_id, extrems)
             if user_id in users_in_room: