#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ptr;
fn main() {
    let whole: &[i32; 3] = &[1, 2, 3];
    let first: &i32 = &whole[0];
    assert!(ptr::addr_eq(whole, first));
    assert!(! ptr::eq::< dyn std::fmt::Debug > (whole, first));
}