#[derive(Debug)]
struct Foo {
    x: u32,
    y: usize,
}

fn main() {
    let mut bar = Foo { x: 5, y: 1000032 };
    bar.x = 8;
    let mut baz = &mut bar;
    //bar.x = 10;
    {
        let x = &mut baz;
        x.x = 9;
        baz.x = 7;
    }
    bar.x = 10;

    println!("Hello, world! {:?}", bar);
}