#![allow(unused_variables)]
fn main() {
    let big_box = Box::<[usize; 1024]>::new_uninit();
    let mut array = [0; 1024];
    for (i, place) in array.iter_mut().enumerate() {
        *place = i;
    }
    let big_box = Box::write(big_box, array);
    for (i, x) in big_box.iter().enumerate() {
        assert_eq!(* x, i);
    }
}