--TEST--
"embed" tag
--TEMPLATE(index.twig)--
FOO
{% embed "foo.twig" %}
    {% block c1 %}
        {{ nothing }}
    {% endblock %}
{% endembed %}
BAR
--TEMPLATE(foo.twig)--
{% block c1 %}{% endblock %}
--DATA--
return []
--EXCEPTION--
Twig\Error\RuntimeError: Variable "nothing" does not exist in "index.twig" at line 5.