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//@ run-pass
//@ ignore-windows
//@ needs-threads
use std::cell::Cell;
use std::fmt;
use std::thread;
struct Foo(Cell<isize>);
impl fmt::Debug for Foo {
fn fmt(&self, _fmt: &mut fmt::Formatter) -> fmt::Result {
let Foo(ref f) = *self;
assert_eq!(f.get(), 0);
f.set(1);
Ok(())
}
}
pub fn main() {
thread::spawn(move || {
let mut f = Foo(Cell::new(0));
println!("{:?}", f);
let Foo(ref mut f) = f;
assert_eq!(f.get(), 1);
})
.join()
.ok()
.unwrap();
}
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