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I am afraid that the same problem occurs all over the place, wherever long integers are accepted by built-in operations or functions.  Most of these places accept (and round) a float argument as well, though this is supposedly deprecated.  For example:

f = open('filename')
f.seek(999999999999)    # ok
f.seek(12.0)            # ok
f.seek(999999999999.0)  # OverflowError

Unless someone is willing to conduct a systematic review I believe it unlikely that it will get fixed, given the deprecation status.