[issue29840] Avoid raising OverflowError in bool()

[STINNER Victor]

STINNER Victor added the comment:

Hum, I dislike this change since it's non-obvious what/who is raising the OverflowError. If an object calls a function in __len__() and the function raises OverflowError, should we consider that object is "true"? In temptation to guess, I prefer to not guess but passthrough the exception.

If you want to support bool(range(1<<1000)), we need to get the result of __len__() as a Python object rather than a C Py_ssize_t.

Maybe, if __len__() raises an OverflowError: call again the len(), but using the "__len__" method instead of the slot?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29840>
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