#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(ip_as_octets)]
use std::net::Ipv4Addr;
fn main() {
    let addr = Ipv4Addr::new(127, 0, 0, 1);
    assert_eq!(addr.as_octets(), & [127, 0, 0, 1]);
}