#![allow(unused_variables)]
fn main() {
    use std::rc::Rc;
    let x = Rc::new(0);
    let y = Rc::clone(&x);
    let x_ptr = Rc::as_ptr(&x);
    assert_eq!(x_ptr, Rc::as_ptr(& y));
    assert_eq!(unsafe { * x_ptr }, 0);
}