((status#set_stack stack)#set_obj(sn:>lowtac_status)#obj)#set_estatus sn
;;
-let atomic_tac htac : #tac_status as 'a -> 'a = distribute_tac (exec htac) ;;
+let atomic_tac htac: #tac_status as 'a -> 'a = distribute_tac (exec htac) ;;
let repeat_tac t s =
let rec repeat t (status : #tac_status as 'a) : 'a =