How to fix Worker Pool Deadlock : <p>I wrote a pool of workers, where the job is to receive an integer and return that number converted to string. However I faced a <code>fatal error: all goroutines are asleep - deadlock!</code> error. What am I doing wrong and how can I fix it?</p>

<p><a href="https://play.golang.org/p/U814C2rV5na" rel="nofollow noreferrer">https://play.golang.org/p/U814C2rV5na</a></p>
