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//@ run-pass
#![allow(unused_parens)]
//@ needs-threads
use std::sync::mpsc::{channel, Sender};
use std::thread;
pub fn main() {
let (tx, rx) = channel();
// Spawn 10 threads each sending us back one isize.
let mut i = 10;
while (i > 0) {
println!("{}", i);
let tx = tx.clone();
thread::spawn({
let i = i;
move || child(i, &tx)
});
i = i - 1;
}
// Spawned threads are likely killed before they get a chance to send
// anything back, so we deadlock here.
i = 10;
while (i > 0) {
println!("{}", i);
rx.recv().unwrap();
i = i - 1;
}
println!("main thread exiting");
}
fn child(x: isize, tx: &Sender<isize>) {
println!("{}", x);
tx.send(x).unwrap();
}
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