procedure Test.4 (Test.30):
    joinpoint Test.14 Test.5:
        let Test.24 : Int1 = 1i64;
        let Test.25 : Int1 = GetTagId Test.5;
        let Test.26 : Int1 = lowlevel Eq Test.24 Test.25;
        if Test.26 then
            let Test.15 : Int1 = false;
            ret Test.15;
        else
            let Test.20 : [C I64, C ] = UnionAtIndex (Id 0) (Index 0) Test.5;
            let Test.21 : U8 = 1i64;
            let Test.22 : U8 = GetTagId Test.20;
            let Test.23 : Int1 = lowlevel Eq Test.21 Test.22;
            if Test.23 then
                let Test.16 : Int1 = true;
                ret Test.16;
            else
                let Test.8 : [<rnu><null>, C [C I64, C ] *self] = UnionAtIndex (Id 0) (Index 1) Test.5;
                jump Test.14 Test.8;
    in
    jump Test.14 Test.30;

procedure Test.0 ():
    let Test.29 : I64 = 3i64;
    let Test.27 : [C I64, C ] = Just Test.29;
    let Test.28 : [<rnu><null>, C [C I64, C ] *self] = Nil ;
    let Test.13 : [<rnu><null>, C [C I64, C ] *self] = Cons Test.27 Test.28;
    let Test.12 : Int1 = CallByName Test.4 Test.13;
    dec Test.13;
    ret Test.12;