diff --git a/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
index 1cbdeab18e..5b963261fe 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
@@ -52,7 +52,7 @@ class InlineFragmentRenderer extends RoutableFragmentRenderer
         $reference = null;
         if ($uri instanceof ControllerReference) {
             $reference = $uri;
-            $uri = $this->generateFragmentUri($uri, $request);
+            $uri = $this->generateFragmentUri($uri, $request, false);
         }
 
         $subRequest = $this->createSubRequest($uri, $request);
diff --git a/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
index 879a0bb7ac..1137ce59f6 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
@@ -40,12 +40,17 @@ abstract class RoutableFragmentRenderer implements FragmentRendererInterface
      * Generates a fragment URI for a given controller.
      *
      * @param ControllerReference  $reference A ControllerReference instance
-     * @param Request              $request    A Request instance
+     * @param Request              $request   A Request instance
+     * @param Boolean              $strict    Whether to allow non-scalar attributes or not
      *
      * @return string A fragment URI
      */
-    protected function generateFragmentUri(ControllerReference $reference, Request $request)
+    protected function generateFragmentUri(ControllerReference $reference, Request $request, $strict = true)
     {
+        if ($strict) {
+            $this->checkNonScalar($reference->attributes);
+        }
+
         if (!isset($reference->attributes['_format'])) {
             $reference->attributes['_format'] = $request->getRequestFormat();
         }
@@ -56,4 +61,17 @@ abstract class RoutableFragmentRenderer implements FragmentRendererInterface
 
         return $request->getUriForPath($this->fragmentPath.'?'.http_build_query($reference->query, '', '&'));
     }
+
+    private function checkNonScalar($values)
+    {
+        foreach ($values as $value) {
+            if (is_array($value)) {
+                $this->checkNonScalar($value);
+            }
+
+            if (!is_scalar($value)) {
+                throw new \LogicException('Controller attributes cannot contain non-scalar values.');
+            }
+        }
+    }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
index 2106f9de75..b780a162d1 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
@@ -13,7 +13,6 @@ namespace Symfony\Component\HttpKernel\Fragment\Tests\FragmentRenderer;
 
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;
-use Symfony\Component\HttpKernel\Fragment\RoutableFragmentRenderer;
 
 class RoutableFragmentRendererTest extends \PHPUnit_Framework_TestCase
 {
@@ -22,7 +21,7 @@ class RoutableFragmentRendererTest extends \PHPUnit_Framework_TestCase
      */
     public function testGenerateFragmentUri($uri, $controller)
     {
-        $this->assertEquals($uri, $this->getRenderer()->doGenerateFragmentUri($controller, Request::create('/')));
+        $this->assertEquals($uri, $this->callGenerateFragmentUriMethod($controller, Request::create('/')));
     }
 
     public function getGenerateFragmentUriData()
@@ -33,6 +32,7 @@ class RoutableFragmentRendererTest extends \PHPUnit_Framework_TestCase
             array('http://localhost/_fragment?_path=foo%3Dfoo%26_format%3Djson%26_controller%3Dcontroller', new ControllerReference('controller', array('foo' => 'foo', '_format' => 'json'), array())),
             array('http://localhost/_fragment?bar=bar&_path=foo%3Dfoo%26_format%3Dhtml%26_controller%3Dcontroller', new ControllerReference('controller', array('foo' => 'foo'), array('bar' => 'bar'))),
             array('http://localhost/_fragment?foo=foo&_path=_format%3Dhtml%26_controller%3Dcontroller', new ControllerReference('controller', array(), array('foo' => 'foo'))),
+            array('http://localhost/_fragment?_path=foo%255B0%255D%3Dfoo%26foo%255B1%255D%3Dbar%26_format%3Dhtml%26_controller%3Dcontroller', new ControllerReference('controller', array('foo' => array('foo', 'bar')), array())),
         );
     }
 
@@ -42,22 +42,36 @@ class RoutableFragmentRendererTest extends \PHPUnit_Framework_TestCase
         $request->attributes->set('_format', 'json');
         $controller = new ControllerReference('controller', array(), array());
 
-        $this->assertEquals('http://localhost/_fragment?_path=_format%3Djson%26_controller%3Dcontroller', $this->getRenderer()->doGenerateFragmentUri($controller, $request));
+        $this->assertEquals('http://localhost/_fragment?_path=_format%3Djson%26_controller%3Dcontroller', $this->callGenerateFragmentUriMethod($controller, $request));
     }
 
-    private function getRenderer()
+    /**
+     * @expectedException LogicException
+     */
+    public function testGenerateFragmentUriWithObject()
     {
-        return new Renderer();
+        $controller = new ControllerReference('controller', array('foo' => new Foo(), 'bar' => 'bar'), array());
+
+        $this->callGenerateFragmentUriMethod($controller, Request::create('/'));
+    }
+
+    private function callGenerateFragmentUriMethod(ControllerReference $reference, Request $request)
+    {
+        $renderer = $this->getMockForAbstractClass('Symfony\Component\HttpKernel\Fragment\RoutableFragmentRenderer');
+        $r = new \ReflectionObject($renderer);
+        $m = $r->getMethod('generateFragmentUri');
+        $m->setAccessible(true);
+
+        return $m->invoke($renderer, $reference, $request);
     }
 }
 
-class Renderer extends RoutableFragmentRenderer
+class Foo
 {
-    public function render($uri, Request $request, array $options = array()) {}
-    public function getName() {}
+    public $foo;
 
-    public function doGenerateFragmentUri(ControllerReference $reference, Request $request)
+    public function getFoo()
     {
-        return parent::generateFragmentUri($reference, $request);
+        return $this->foo;
     }
 }