[issue20032] asyncio.Future.set_exception() creates a reference cycle

[Guido van Rossum]

Guido van Rossum added the comment:

The only reasonable place to break the cycle seems to be the frame containing the set_exception() call -- but that could be app code.

Looking again at what the patch actually does I think it is too big a hammer anyway -- it would break debugging tools that preserve tracebacks and inspect the frames later.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20032>
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