type Holder {
    value: ref<i32>,
}

pub fn main() -> Void {
    let next: i32 = 1
    var old: i32 = 2
    var holder: Holder = Holder { value: &old }
    if true {
        let selected: mutref<Holder> = &mut holder
        selected.value = &next
    }
    old = 3
}