User can execute revoke for priviliges which they never had (without error)

[den-crane]

create user u identified by '123';
create role r1;

clickhouse-client -u u --password=123

revoke select on x from r1;
Ok.                                                           -<<<<<<--- I would expect an error here
0 rows in set. Elapsed: 0.000 sec.

there is no object x.