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A bug was reported by a user (taogon):
![image](https://private-user-images.githubusercontent.com/37844818/411647845-859405af-a615-4f41-8a7c-403475151e4f.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.s6U_fPOiZZBzKVx6ADPC22H83F5Tx3qmabhtwjdlTys)
This stems from the fact that in the case of an exception encountered during the getting of the event loop or during the execution of a coroutine with it, we create a new event loop, and run again with this new event loop. We then close the event loop (after setting it as the main event loop for the thread), and then attempt to reuse this closed event loop in
Dendrite.close_session
.This PR adds a flag so the logic can all remain in place, but allows the event loop to be closed during the
close_session
method.