False deadlock detection in case of exception in run_in_executor #497
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See issue #495
I suppose this problem can only affect developing/debugging because it should not happen in production.
In my case, the executor was shut down unexpectedly, but I spent time to find the deadlock.
Also, a real exception will be raised only one time, and you will get deadlock detection further, which is more confusing.
However, I have doubts about catching a cancelation error here like in awaiting. A quick review of PEPs didn't answer.