Description:
------------
Hi.

Some days ago, I tried a script containing a syntax error and executed it on both Symfony's server wrapper (executed using server:run command) and Nginx/PHP-FPM.

Using Nginx I had the syntax error as expected but using the Symfony's wrapper I had a segfault, crashing the web server.

I precise that only the server:run command is returning a segfault. The server:start command run as expected.


Test script:
---------------
<?php

namespace AppBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;

class DefaultController extends Controller
{
    public function indexAction()
    {
        $response = $this->render('')
    }
}

Expected result:
----------------
Parse error: syntax error, unexpected '}' 

Actual result:
--------------
[OK] Server running on http://127.0.0.1:8000                                                                           


 // Quit the server with CONTROL-C.
  RUN  '/usr/bin/php7.0' '-S' '127.0.0.1:8000' '/home/booteille/PhpstormProjects/my_project/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php'
  ERR  [Fri Dec  4 05:20:17 2015] 127.0.0.1:60062 [500]: /
  ERR  [Fri Dec  4 05:20:18 2015] 127.0.0.1:60063 [200]: /bundles/framework/css/structure.css
  ERR  [Fri Dec  4 05:20:18 2015] 127.0.0.1:60064 [200]: /bundles/framework/css/exception.css
  ERR  [Fri Dec  4 05:20:18 2015] 127.0.0.1:60065 [200]: /bundles/framework/css/body.css
  ERR  [Fri Dec  4 05:20:18 2015] 127.0.0.1:60066 [200]: /_wdt/f84516
  ERR  Segmentation fault
  ERR  
  RES  139 Command did not run successfully


 [ERROR] Built-in server terminated unexpectedly.