contract OraclesErr =

  public function unsafeCreateQueryThenErr(
    o    : oracle(string, int),
    q    : string,
    qfee  : int,
    qttl : Chain.ttl,
    rttl : Chain.ttl) : oracle_query(string, int) =
    let x = Oracle.query(o, q, qfee, qttl, rttl)
    switch(0) 1 => ()
    x // Never reached.