#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let a = [1, 2, 3];
    assert!(std::ptr::eq(& a[..3], & a[..3]));
    assert!(! std::ptr::eq(& a[..2], & a[..3]));
    assert!(! std::ptr::eq(& a[0..2], & a[1..3]));
}