use std::thread;
use std::sync::mpsc::channel;

fn main() {

    let (tx, rx) = channel();
    for i in 0..10 {
        let tx = tx.clone();
        thread::spawn(move|| {
            tx.send(i).unwrap();
        });
    }

    for _ in 0..10 {
        let j = rx.recv().unwrap();
        assert!(0 <= j && j < 10);
    }
}