#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(slice_iter_mut_as_mut_slice)]
fn main() {
    let mut slice: &mut [usize] = &mut [1, 2, 3];
    let mut iter = slice.iter_mut();
    let mut_slice = iter.as_mut_slice();
    assert_eq!(mut_slice, & mut [1, 2, 3]);
    mut_slice[0] = 4;
    mut_slice[2] = 5;
    assert_eq!(iter.next(), Some(& mut 4));
    assert_eq!(iter.as_mut_slice(), & mut [2, 5]);
}