Issue #1777430 by Crell, sun, tim.plunkett: Fixed Allow for ContainerAware controllers.

core/lib/Drupal/Core/ControllerResolver.php

@@ -60,5 +60,7 @@ protected function createController($controller) {
     if ($controller[0] instanceof ContainerAwareInterface) {
       $controller[0]->setContainer($this->container);
     }
+
+    return $controller;
   }
 }

core/modules/system/lib/Drupal/system/Tests/Routing/ControllerResolverTest.php

+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Routing\ControllerResolverTest.
+ */
+
+namespace Drupal\system\Tests\Routing;
+
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\HttpFoundation\Request;
+
+use Drupal\Core\ControllerResolver;
+use Drupal\simpletest\UnitTestBase;
+
+/**
+ * Tests that the Drupal-extended ControllerResolver is functioning properly.
+ */
+class ControllerResolverTest extends UnitTestBase {
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Controller Resolver tests',
+      'description' => 'Tests that the Drupal-extended ControllerResolver is functioning properly.',
+      'group' => 'Routing',
+    );
+  }
+
+  /**
+   * Confirms that a container aware controller gets returned.
+   */
+  function testContainerAware() {
+    $container = new Container();
+    $resolver = new ControllerResolver($container);
+
+    $request = Request::create('/some/path');
+    $request->attributes->set('_controller', '\Drupal\system\Tests\Routing\MockController::run');
+
+    $controller = $resolver->getController($request);
+
+    $this->assertTrue($controller[0] instanceof MockController, 'The correct controller object was returned.');
+  }
+}

core/modules/system/lib/Drupal/system/Tests/Routing/MockController.php

+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Routing\MockController.
+ */
+
+namespace Drupal\system\Tests\Routing;
+
+use Symfony\Component\DependencyInjection\ContainerAware;
+
+/**
+ * Dummy class, just for testing.
+ */
+class MockController extends ContainerAware {
+
+  public function run() {}
+
+}