load_pop_mark(UnpicklerObject *self)
{
    Py_ssize_t i;

    if ((i = marker(self)) < 0)
        return -1;

    Pdata_clear(self->stack, i);

    return 0;
}
load_pop_mark(UnpicklerObject *self)
{
    Py_ssize_t i;

    if ((i = marker(self)) < 0)
        return -1;

    Pdata_clear(self->stack, i);

    return 0;
}