comparison vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php @ 12:7a779792577d

Update Drupal core to v8.4.5 (via Composer)

      * {@inheritdoc}
      */
     public function hasListeners($eventName = null)
     {
         if (null === $eventName) {
-            return (bool) count($this->listenerIds) || (bool) count($this->listeners);
+            return $this->listenerIds || $this->listeners || parent::hasListeners();
         }
 
         if (isset($this->listenerIds[$eventName])) {
             return true;
         }