type RefBag {
    refs: [1]ref<i32>,
}

fn first(bag: RefBag) -> ref<i32> {
    return bag.refs[0]
}

pub fn main() -> Void {
    var x: i32 = 1
    var y: i32 = 2
    var bag: RefBag = RefBag { refs: [&x] }
    let current: ref<i32> = first(bag)
    bag.refs = [&y]
    x = 3
}