[issue24017] Implemenation of the PEP 492 - Coroutines with async and await syntax

[Nick Coghlan]

Nick Coghlan added the comment:

I'm going to dig into this one locally, as it sounds to me like something may be going wrong with the refcounts in the complex stack manipulation involved in WITH_CLEANUP. It seems plausible that there's a genuinely missing incref/decref pair somewhere in the non-exceptional path, which the proposed new opcode is working around.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24017>
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