[issue17206] Py_XDECREF() expands its argument multiple times

[STINNER Victor]

STINNER Victor added the comment:

> Can we get a full stack trace (for the C stack not the Python one) for the failure?

Yes, using a debugger on Windows x64. I'm waiting for a renewal of my MSDN account to get Visual Studio (full version, not the Express version limited to 32-bit).

Until this, I enabled faulthandler in subprocesses created by test.regrtest and test.script_helper because it may help this issue, but also others future crashes.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17206>
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