procedure List.2 (#Attr.2, #Attr.3):
    let List.156 : U64 = lowlevel ListLen #Attr.2;
    let List.153 : Int1 = lowlevel NumLt #Attr.3 List.156;
    if List.153 then
        let List.155 : I64 = lowlevel ListGetUnsafe #Attr.2 #Attr.3;
        let List.154 : [C {}, C I64] = Ok List.155;
        ret List.154;
    else
        let List.152 : {} = Struct {};
        let List.151 : [C {}, C I64] = Err List.152;
        ret List.151;

procedure List.3 (List.63, List.64, List.65):
    let List.143 : {List I64, I64} = CallByName List.57 List.63 List.64 List.65;
    let List.142 : List I64 = StructAtIndex 0 List.143;
    inc List.142;
    dec List.143;
    ret List.142;

procedure List.57 (#Attr.2, #Attr.3, #Attr.4):
    let List.160 : U64 = lowlevel ListLen #Attr.2;
    let List.158 : Int1 = lowlevel NumLt #Attr.3 List.160;
    if List.158 then
        let List.159 : {List I64, I64} = lowlevel ListReplaceUnsafe #Attr.2 #Attr.3 #Attr.4;
        ret List.159;
    else
        let List.157 : {List I64, I64} = Struct {#Attr.2, #Attr.4};
        ret List.157;

procedure Test.1 (Test.2, Test.3, Test.4):
    let Test.29 : [C {}, C I64] = CallByName List.2 Test.4 Test.3;
    let Test.28 : [C {}, C I64] = CallByName List.2 Test.4 Test.2;
    let Test.13 : {[C {}, C I64], [C {}, C I64]} = Struct {Test.28, Test.29};
    joinpoint Test.25:
        let Test.16 : List I64 = Array [];
        ret Test.16;
    in
    let Test.22 : [C {}, C I64] = StructAtIndex 1 Test.13;
    let Test.23 : U8 = 1i64;
    let Test.24 : U8 = GetTagId Test.22;
    let Test.27 : Int1 = lowlevel Eq Test.23 Test.24;
    if Test.27 then
        let Test.19 : [C {}, C I64] = StructAtIndex 0 Test.13;
        let Test.20 : U8 = 1i64;
        let Test.21 : U8 = GetTagId Test.19;
        let Test.26 : Int1 = lowlevel Eq Test.20 Test.21;
        if Test.26 then
            let Test.18 : [C {}, C I64] = StructAtIndex 0 Test.13;
            let Test.6 : I64 = UnionAtIndex (Id 1) (Index 0) Test.18;
            let Test.17 : [C {}, C I64] = StructAtIndex 1 Test.13;
            let Test.7 : I64 = UnionAtIndex (Id 1) (Index 0) Test.17;
            let Test.15 : List I64 = CallByName List.3 Test.4 Test.2 Test.7;
            let Test.14 : List I64 = CallByName List.3 Test.15 Test.3 Test.6;
            ret Test.14;
        else
            dec Test.4;
            jump Test.25;
    else
        dec Test.4;
        jump Test.25;

procedure Test.0 ():
    let Test.10 : U64 = 0i64;
    let Test.11 : U64 = 0i64;
    let Test.12 : List I64 = Array [1i64];
    let Test.9 : List I64 = CallByName Test.1 Test.10 Test.11 Test.12;
    ret Test.9;