contract interface HigherOrderState =
  entrypoint init : () => void
  entrypoint apply : int => int
  stateful entrypoint inc : int => unit

contract interface LowerDisorderAnarchy =
  entrypoint init : (int) => void


main contract C =
  // both `s` and `l` should be of type `HigherOrderState` in this test
  stateful entrypoint run_clone(s : HigherOrderState, l : LowerDisorderAnarchy) : HigherOrderState =
    let s1 = Chain.clone(ref=s)
    let Some(s2) = Chain.clone(ref=s, protected=true)
    let None = Chain.clone(ref=s, protected=true, gas=1)
    let None = Chain.clone(ref=l, protected=true, 123) // since it should be HigherOrderState underneath
    let s3 = Chain.clone(ref=s1)
    require(s1.apply(2137) == 2137, "APPLY_S1_0")
    require(s2.apply(2137) == 2137, "APPLY_S2_0")
    require(s3.apply(2137) == 2137, "APPLY_S3_0")
    s1.inc(1)
    s2.inc(1)
    s1.inc(1)
    require(s1.apply(2137) == 2139, "APPLY_S1_2")
    require(s2.apply(2137) == 2138, "APPLY_S2_1")
    require(s3.apply(2137) == 2137, "APPLY_S3_0")
    s1