Listener removing itself

test.php

 <?php
 
 require "vendor/autoload.php";
 
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\Event;
 
 $dispatcher = new EventDispatcher;
 
 $eventName = 'dave';
 $listener = function() use ($eventName, &$listener, $dispatcher) {
     echo "doing things\n";
     $dispatcher->removeListener($eventName, $listener);
 };
 
 $dispatcher->addListener($eventName, $listener);
 $dispatcher->addListener($eventName, function() { echo "other things\n"; });  
 
 $dispatcher->dispatch($eventName, new Event());
 $dispatcher->dispatch($eventName, new Event());
 $dispatcher->dispatch($eventName, new Event()); 
 $dispatcher->dispatch($eventName, new Event());
 
 echo 'done';
 
 // doing things
 // other things
 // other things
 // other things
 // other things
 // done