use std::thread;
use std::time::Duration;
use crossbeam; // 0.6.0

fn main() {
    let handles = (0..2).map(|worker_id| {
        eprintln!("Spawning worker {}", worker_id);
        let handle = thread::spawn(move || {
            eprintln!("Worker {} is running", worker_id);
            for _ in 0..5 {
                thread::sleep(Duration::from_millis(10));
                eprintln!("Worker {} did some work", worker_id);
            }
        });
        eprintln!("Worker {} has spawned", worker_id);
        handle
    });

    thread::sleep(Duration::from_secs(1));

    eprintln!("Joining workers from the main thread");
    for handle in handles.rev() {
        handle.join().unwrap();
    }
}