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Fix get_users_in_room mis-use in transfer_room_state_on_room_upgrade (#13960)

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Spawning from looking into `get_users_in_room` while investigating https://github.com/matrix-org/synapse/issues/13942#issuecomment-1262787050.

See https://github.com/matrix-org/synapse/pull/13575#discussion_r953023755 for the original exploration around finding `get_users_in_room` mis-uses.

Related to the following PRs where we also cleaned up some `get_users_in_room` mis-uses:

 - https://github.com/matrix-org/synapse/pull/13605
 - https://github.com/matrix-org/synapse/pull/13608
 - https://github.com/matrix-org/synapse/pull/13606
 - https://github.com/matrix-org/synapse/pull/13958
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Eric Eastwood 2022-09-30 20:10:50 -05:00 committed by GitHub
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changelog.d/13960.misc Normal file
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@ -0,0 +1 @@
Use dedicated `get_local_users_in_room(room_id)` function to find local users when calculating users to copy over during a room upgrade.

4
synapse/handlers/room_member.py
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@ -1150,8 +1150,8 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
logger.info("Transferring room state from %s to %s", old_room_id, room_id)
# Find all local users that were in the old room and copy over each user's state
users = await self.store.get_users_in_room(old_room_id)
await self.copy_user_state_on_room_upgrade(old_room_id, room_id, users)
local_users = await self.store.get_local_users_in_room(old_room_id)
await self.copy_user_state_on_room_upgrade(old_room_id, room_id, local_users)
# Add new room to the room directory if the old room was there
# Remove old room from the room directory