Session validation breaks when all event managers are intercepted

see zendframework/zendframework#6147

src/ZendDeveloperTools/Collector/EventCollectorInterface.php

@@ -10,6 +10,7 @@
 namespace ZendDeveloperTools\Collector;
 
 use Zend\EventManager\Event;
+
 /**
  * Event Data Collector Interface.
  *

src/ZendDeveloperTools/Collector/MemoryCollector.php

@@ -17,7 +17,6 @@
  */
 class MemoryCollector extends AbstractCollector implements EventCollectorInterface
 {
-
     /**
      * @inheritdoc
      */

src/ZendDeveloperTools/Listener/EventLoggingListenerAggregate.php

@@ -25,7 +25,6 @@
  */
 class EventLoggingListenerAggregate implements SharedListenerAggregateInterface
 {
-
     /**
      *
      * @var ServiceLocatorInterface
@@ -98,20 +97,26 @@ public function detachShared(SharedEventManagerInterface $events)
      */
     public function onCollectEvent(Event $event)
     {
-        $strict = $this->options->isStrict();
+        $strict     = $this->options->isStrict();
         $collectors = $this->options->getEventCollectors();
 
-        foreach ($collectors as $name => $collector) {
+        foreach ($collectors as $collector) {
             if ($this->serviceLocator->has($collector)) {
-                $this->serviceLocator->get($collector)->collectEvent('application', $event);
+                /* @var $currentCollector \ZendDeveloperTools\Collector\EventCollectorInterface */
+                $currentCollector = $this->serviceLocator->get($collector);
+
+                $currentCollector->collectEvent('application', $event);
             } else {
                 $error = sprintf('Unable to fetch or create an instance for %s.', $collector);
+
                 if ($strict === true) {
                     throw new ServiceNotFoundException($error);
                 } else {
                     $this->report->addError($error);
                 }
             }
         }
+
+        return true; // @TODO workaround, to be removed when https://github.com/zendframework/zf2/pull/6147 is fixed
     }
 }