Minor typing fixes (#12034)

These started failing in
https://github.com/matrix-org/synapse/pull/12031... I'm a bit mystified by how
they ever worked.

2 files changed, 9 insertions, 7 deletions

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

index 9267e586a8..4d0da84287 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -550,10 +550,11 @@ class EventCreationHandler:
 
         if event_dict["type"] == EventTypes.Create and event_dict["state_key"] == "":
             room_version_id = event_dict["content"]["room_version"]
-            room_version_obj = KNOWN_ROOM_VERSIONS.get(room_version_id)
-            if not room_version_obj:
+            maybe_room_version_obj = KNOWN_ROOM_VERSIONS.get(room_version_id)
+            if not maybe_room_version_obj:
                 # this can happen if support is withdrawn for a room version
                 raise UnsupportedRoomVersionError(room_version_id)
+            room_version_obj = maybe_room_version_obj
         else:
             try:
                 room_version_obj = await self.store.get_room_version(
@@ -1145,12 +1146,13 @@ class EventCreationHandler:
             room_version_id = event.content.get(
                 "room_version", RoomVersions.V1.identifier
             )
-            room_version_obj = KNOWN_ROOM_VERSIONS.get(room_version_id)
-            if not room_version_obj:
+            maybe_room_version_obj = KNOWN_ROOM_VERSIONS.get(room_version_id)
+            if not maybe_room_version_obj:
                 raise UnsupportedRoomVersionError(
                     "Attempt to create a room with unsupported room version %s"
                     % (room_version_id,)
                 )
+            room_version_obj = maybe_room_version_obj
         else:
             room_version_obj = await self.store.get_room_version(event.room_id)
 
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py

index a719d5eef3..80320d2c07 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -320,12 +320,12 @@ class RegistrationHandler:
                 if fail_count > 10:
                     raise SynapseError(500, "Unable to find a suitable guest user ID")
 
-                localpart = await self.store.generate_user_id()
-                user = UserID(localpart, self.hs.hostname)
+                generated_localpart = await self.store.generate_user_id()
+                user = UserID(generated_localpart, self.hs.hostname)
                 user_id = user.to_string()
                 self.check_user_id_not_appservice_exclusive(user_id)
                 if generate_display_name:
-                    default_display_name = localpart
+                    default_display_name = generated_localpart
                 try:
                     await self.register_with_store(
                         user_id=user_id,