[issue21435] Segfault with cyclic reference and asyncio.Future

[Guido van Rossum]

Guido van Rossum added the comment:

Confirmed too (OSX 10.9 again, CPython 3.4 or 3.5; but it doesn't crash with CPython 3.3). There is no C code in asyncio, so I'm not sure how asyncio can be directly responsible for this crash. Probably some of the GC improvements have an edge case that is triggered by the example program. Adding Antoine and Victor, they probably understand that code better.

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nosy: +gvanrossum, haypo, pitrou

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<http://bugs.python.org/issue21435>
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