[issue21326] asyncio: request clearer error message when event loop closed

[STINNER Victor]

STINNER Victor added the comment:

Attached asyncio_closed_py34.patch: minimum patch to fix this issue. run_forever() and run_until_complete() raises a RuntimeError if the event loop was closed.

The patch only uses the private attribute BaseEventLoop._closed in the BaseEventLoop class, not outside.

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keywords: +patch
Added file: http://bugs.python.org/file35474/asyncio_closed_py34.patch

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