#![allow(unused_variables)]
fn main() {
    use std::sync::{Arc, Weak};
    let strong = Arc::new("hello".to_owned());
    let weak = Arc::downgrade(&strong);
    let raw = weak.into_raw();
    assert_eq!(1, Arc::weak_count(& strong));
    assert_eq!("hello", unsafe { &* raw });
    drop(unsafe { Weak::from_raw(raw) });
    assert_eq!(0, Arc::weak_count(& strong));
}