#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::mem;
#[repr(packed)]
struct Foo {
    bar: u8,
}
fn main() {
    let foo_array = [10u8];
    unsafe {
        let mut foo_struct: Foo = mem::transmute_copy(&foo_array);
        assert_eq!(foo_struct.bar, 10);
        foo_struct.bar = 20;
        assert_eq!(foo_struct.bar, 20);
    }
    assert_eq!(foo_array, [10]);
}