MAPLE_CMDSTAT_NONE
u->u_func[f].f_cmdstat = MAPLE_CMDSTAT_NONE;
fn->f_cmdstat = MAPLE_CMDSTAT_NONE;
if (fn->f_cmdstat != MAPLE_CMDSTAT_NONE)
KASSERT(fn->f_cmdstat != MAPLE_CMDSTAT_NONE);
fn->f_cmdstat = MAPLE_CMDSTAT_NONE;