[issue20539] math.factorial may throw OverflowError

[Stefan Krah]

Stefan Krah added the comment:

I slightly favor the ValueError patch because there is only a single exception
to catch. PyLong_AsUnsignedLong() also raises OverflowError for both positive
values that are too large and for negative values.

Perhaps the error message could contain the actual range of allowed values,
especially since LONG_MAX differs across platforms.

The drawback is that "outrageously" would have to go then. :)

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<http://bugs.python.org/issue20539>
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