4 files changed, 3 insertions, 5 deletions
diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py
index 62aa9a2da8..6f15c68240 100644
--- a/synapse/handlers/directory.py
+++ b/synapse/handlers/directory.py
@@ -383,7 +383,7 @@ class DirectoryHandler(BaseHandler):
         """
         creator = await self.store.get_room_alias_creator(alias.to_string())
 
-        if creator is not None and creator == user_id:
+        if creator == user_id:
             return True
 
         # Resolve the alias to the corresponding room.
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index d5f7c78edf..f1a6699cd4 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -962,8 +962,6 @@ class RoomCreationHandler(BaseHandler):
             try:
                 random_string = stringutils.random_string(18)
                 gen_room_id = RoomID(random_string, self.hs.hostname).to_string()
-                if isinstance(gen_room_id, bytes):
-                    gen_room_id = gen_room_id.decode("utf-8")
                 await self.store.store_room(
                     room_id=gen_room_id,
                     room_creator_user_id=creator_id,
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 8feba8c90a..5ec36f591d 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -642,7 +642,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
 
     async def send_membership_event(
         self,
-        requester: Requester,
+        requester: Optional[Requester],
         event: EventBase,
         context: EventContext,
         ratelimit: bool = True,
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index bfe2583002..260ec19b41 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -87,7 +87,7 @@ class SyncConfig:
 class TimelineBatch:
     prev_batch = attr.ib(type=StreamToken)
     events = attr.ib(type=List[EventBase])
-    limited = attr.ib(bool)
+    limited = attr.ib(type=bool)
 
     def __bool__(self) -> bool:
         """Make the result appear empty if there are no updates. This is used