[issue38599] Deprecate creation of asyncio object when the loop is not running

[Yury Selivanov]

Yury Selivanov <yselivanov at gmail.com> added the comment:

Yes.

As a remedy for this particular problem we can add checks here and there comparing `asyncio.get_running_loop()` and `self._loop`.  Performance will suffer a bit but the usability will greatly improve.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38599>
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