#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ptr;
fn main() {
    let mut vec = vec![0u32; 4];
    unsafe {
        let vec_ptr = vec.as_mut_ptr();
        ptr::write_bytes(vec_ptr, 0xfe, 2);
    }
    assert_eq!(vec, [0xfefefefe, 0xfefefefe, 0, 0]);
}