title: Issue in @Twig/Exception/exception_full.html.twig after updating symfony3 with Composer
body: <p>I did the following :</p>
  
  <p>1) I installed a fresh Symfony 3.2.2 version with this command line :  <strong><em>php symfony.phar new Symfony3.2.2</em></strong></p>
  
  <p>2) I tested the version screen display with this url : <a href="http://localhost/Symfony3.2.2/web/app_dev.php/" rel="nofollow noreferrer">http://localhost/Symfony3.2.2/web/app_dev.php/</a>  and it well displays "Welcome to
  Symfony 3.2.2 .... " </p>
  
  <p>3) Then I did an update of symfony and all depencies with this command : <strong><em>php ../composer.phar update symfony/symfony --with-dependencies</em></strong></p>
  
  <p>4) I did not expected it updates anything (since I have installed latest version) but it seems it does, like "Updating twig/twig (v1.31.0 => v2.1.0)" and some few others libs (doctrine collections/annotations/common)</p>
  
  <p>5) Then I retest <a href="http://localhost/Symfony3.2.2/web/app_dev.php/" rel="nofollow noreferrer">http://localhost/Symfony3.2.2/web/app_dev.php/</a>  but this times I got this error : </p>
  
  <p><em>Twig_Error_Syntax in classes.php line 5280:
  An exception has been thrown during the compilation of a template ("Catchable Fatal Error: Argument 1 passed to Twig_Filter::__construct() must be an instance of string, string given, called in C:\wamp\www\Symfony3.2.2\var\cache\dev\classes.php on line 5573 and defined") in "@Twig/Exception/exception_full.html.twig".</em></p>
  
  <p>6) I have tried to clear cache with command : <strong><em>php bin/console cache:clear</em></strong>  and then retest step 5) but I got same error</p>
  
  <p>So all suggestions are welcome... thanks in advance for help </p>