if len(a) == 1 and isinstance(a[0], preserve_exception):
            return target.throw(a[0].typ, a[0].val, a[0].tb)

def throw_to(self, target, *a):
        self.ready.append((getcurrent(), ()))
        """
        if len(a) == 1 and isinstance(a[0], preserve_exception):
            return target.throw(a[0].typ, a[0].val, a[0].tb)
        """
        return target.throw(*a)