bad things happen if you try to invite yourself to a room during creation

[ara4n]

apparently you get a 403 from synapse and the room is in an inconsistent state

[MadLittleMods]

Still reproducible but the room is created successfully and your user is joined to the room at the end. The room state seems fine.

POST http://localhost:8008/_matrix/client/v3/createRoom with a payload of:

{
	"preset":       "public_chat",
	"name":         "test-invite-self-synapse-2386-again",
	"room_version": "9",
	"invite": ["@erictroupetester:my.synapse.server"]
}

❌ 403 Forbidden

{
    "errcode": "M_FORBIDDEN",
    "error": "@erictroupetester:my.synapse.server is already in the room."
}