use std::sync::Arc;

fn main() {
    let bar = 5u32;
    let ptr = &bar as *const u32;
    println!("{:?}", ptr);
    let foo = Arc::new(ptr);
    let baz: *const u32 = *foo;
    let qux: *mut u32 = baz as *mut u32;
    println!("{:?}", qux);
}