[issue29303] asyncio.Lock.acquire() does not always yield

[Guido van Rossum]

Guido van Rossum added the comment:

No, `yield from` (or, in Python 3.5+, `await`) is not meant to bound back to the scheduler. If the target is a coroutine that itself doesn't yield, it is a *feature* that the scheduler is bypassed.

If you want to force a trip through the scheduler, use `asyncio.sleep(0)`.

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status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29303>
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