<p dir="auto"><strong>Symfony version(s) affected</strong>: 4.1.8</p>
<p dir="auto"><strong>Description</strong></p>

<p dir="auto">Symfony crashes php server without providing any error log.<br>
The server log provides me with the following information:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content=" [OK] Server listening on http://127.0.0.1:8000


 // Quit the server with CONTROL-C.

PHP 7.2.12 Development Server started at Wed Nov 28 15:20:14 2018
Listening on http://127.0.0.1:8000
Document root is /Users/christianbieg/Documents/Websites/symfony-test/public
Press Ctrl-C to quit.

 [ERROR] The process has been signaled with signal &quot;11&quot;.
"><pre class="notranslate"><code class="notranslate"> [OK] Server listening on http://127.0.0.1:8000


 // Quit the server with CONTROL-C.

PHP 7.2.12 Development Server started at Wed Nov 28 15:20:14 2018
Listening on http://127.0.0.1:8000
Document root is /Users/christianbieg/Documents/Websites/symfony-test/public
Press Ctrl-C to quit.

 [ERROR] The process has been signaled with signal "11".

</code></pre></div>
<p dir="auto"><strong>How to reproduce</strong></p>

<p dir="auto"><code class="notranslate">composer create-project symfony/website-skeleton symfony-test &amp;&amp; cd symfony-test</code><br>
<code class="notranslate">php bin/console server:run</code></p>
<p dir="auto">and then open the website on <a href="http://localhost:8000" rel="nofollow">http://localhost:8000</a></p>
<p dir="auto"><strong>Symfony version(s) affected</strong>: 4.1.8</p>
<p dir="auto"><strong>Description</strong><br>
<code class="notranslate">(in built in server)[ERROR] The process has been signaled with signal "11".</code></p>
<p dir="auto"><strong>How to reproduce</strong><br>
In any new project, if you clone <code class="notranslate">symfony/website-skeleton</code> run built-in server</p>
<p dir="auto"><strong>Additional context</strong><br>
I think it has a relationship with latest [Routing] fixes <code class="notranslate">@Route</code></p>