Fixing a bug

The $callbacks are eventually passed to addDequeuerAwareCall, which
expects a string, not a Reference object. In Symfony 3, the Reference
was cast to a string, which returned the id, so it worked.

Author: weaverryan

DependencyInjection/OldSoundRabbitMqExtension.php

@@ -255,7 +255,7 @@ protected function loadMultipleConsumers()
             foreach ($consumer['queues'] as $queueName => $queueOptions) {
                 $queues[$queueOptions['name']] = $queueOptions;
                 $queues[$queueOptions['name']]['callback'] = array(new Reference($queueOptions['callback']), 'execute');
-                $callbacks[] = new Reference($queueOptions['callback']);
+                $callbacks[] = $queueOptions['callback'];
             }
 
             $definition = new Definition('%old_sound_rabbit_mq.multi_consumer.class%');