#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(layout_for_ptr)]
use std::mem;
fn main() {
    assert_eq!(4, size_of_val(& 5i32));
    let x: [u8; 13] = [0; 13];
    let y: &[u8] = &x;
    assert_eq!(13, unsafe { mem::size_of_val_raw(y) });
}