Jonathan Slenders <jonathan.slend...@gmail.com> added the comment:
Even simpler, the following code will crash after so many iterations:
```
import asyncio
loop = asyncio.get_event_loop()
while True:
loop.call_soon_threadsafe(loop.stop)
loop.run_forever()
```
Adding a little sleep of 0.01s after `run_forever()` prevents the issue.
So, to me it looks like the cancellation of the `_OverlappedFuture` that wraps
around the `_recv()` call from the self-pipe did not complete before we start
`_recv()` again in the next `run_forever()` call. No idea if that makes sense...
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39010>
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