Class BadMultiply

Lib/test/test_math.py:1360–1364

        # Error in multiplication
        class BadMultiply:
            def __mul__(self, other):
                raise RuntimeError
            def __rmul__(self, other):
                raise RuntimeError
        with self.assertRaises(RuntimeError):
            sumprod([10, BadMultiply(), 30], [1, 2, 3])
        with self.assertRaises(RuntimeError):