@@ -251,7 +251,56 @@ will be passed two parameters:
251251Instead of creating a new exception controller from scratch you can, of course,
252252also extend the default :class: `Symfony\\ Bundle\\ TwigBundle\\ Controller\\ ExceptionController `.
253253In that case, you might want to override one or both of the ``showAction() `` and
254- ``findTemplate() `` methods. The latter one locates the template to be used.
254+ ``findTemplate() `` methods. The latter one locates the template to be used. 
255+ 
256+ .. note ::
257+   
258+     In case of extending the
259+     :class: `Symfony\\ Bundle\\ TwigBundle\\ Controller\\ ExceptionController ` you
260+     may configure a service to pass the Twig environment and the ``debug `` flag
261+     to the constructor. 
262+     
263+     .. configuration-block ::
264+     
265+         .. code-block :: yaml 
266+      
267+             #  app/config/services.yml 
268+             services : 
269+                 app.exception_controller : 
270+                 class : AppBundle\CustomExceptionController  
271+                 arguments : ['@twig', '%kernel.debug%']  
272+ 
273+          .. code-block :: xml 
274+ 
275+             <!--  app/config/services.xml -->  
276+             <?xml  version =" 1.0"  encoding =" utf-8"   ?> 
277+             <container  xmlns =" http://symfony.com/schema/dic/services"  
278+                 xmlns : xsi =" http://www.w3.org/2001/XMLSchema-instance"  
279+                 xsi : schemaLocation =" http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd"  
280+             > 
281+                 <services > 
282+                     <service  id =" app.exception_controller"  
283+                         class =" AppBundle\Controller\CustomExceptionController"  
284+                     > 
285+                         <argument  type =" service"   id =" twig"  /> 
286+                         <argument >%kernel.debug%</argument > 
287+                     </service > 
288+                 </services > 
289+             </container > 
290+ 
291+          .. code-block :: php 
292+ 
293+             // app/config/services.php 
294+             use Symfony\Component\DependencyInjection\Reference; 
295+             use Symfony\Component\DependencyInjection\Definition; 
296+ 
297+             $definition = new Definition('AppBundle\Controller\CustomExceptionController', array( 
298+                 new Reference('twig'), 
299+                 '%kernel.debug%' 
300+             )); 
301+ 
302+      And then configure ``twig.exception_controller `` using the controller as
303+     services syntax (e.g. ``app.exception_controller:showAction ``).
255304
256305.. tip ::
257306
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