Symfony2 simple custom error page

error.html.twig

{# app/Resources/TwigBundle/views/Exception/error.html.twig #}
{% extends '::layout.html.twig' %}
{% block title %}
    Erro {{ status_code }}
{% endblock %}
{% block content %}
{% if status_code == '404' %}
    <h1>Página não encontrada</h1>
{% else %}
    <h1>Erro inesperado</h1>
    <p>
        {{ exception.message|e|replace({"\n": '<br />'})|format_file_from_text }}
    </p>
    <div>
        <strong>{{ status_code }}</strong> {{ status_text }} - {{ exception.class|abbr_class }}
    </div>
{% endif %}
{% endblock %}