def METHOD_NAME(self):
    """
    Issue 2171
    """
    def pyfunc(x):
        if x is None:
            return
        else:
            a, b = x
            return a, b
    tup = types.Tuple([types.intp] * 2)
    opt_tup = types.Optional(tup)
    sig = (opt_tup,)
    cfunc = njit(sig)(pyfunc)
    self.assertEqual(pyfunc(None), cfunc(None))
    self.assertEqual(pyfunc((1, 2)), cfunc((1, 2)))