fn main()
{
  let thread_body = || {
    for i in 1..10 {
      println!("Count {}", i);
      std::thread::sleep(std::time::Duration::from_millis(100));
    }
  };
  let h = std::thread::spawn(thread_body);

  println!("Main thread, here!");
  let r = h.join();

  if let Err(_) = r {
    println!("Join failed!!!")
  }
}