--TEST--
"block" function with a template argument resolves nested "block" calls against the overriding template through parent()
--TEMPLATE--
{{ block('block1', 'theme.html.twig') }}
--TEMPLATE(theme.html.twig)--
{% extends 'base.html.twig' %}

{%- block block1 -%}
    {{- parent() -}}
    BLOCK1THEME/
{%- endblock -%}

{%- block block2 -%}
    BLOCK2THEME/
{%- endblock -%}
--TEMPLATE(base.html.twig)--
{%- block block1 -%}
    BLOCK1BASE/
    {{- block('block2') -}}
{%- endblock -%}

{%- block block2 -%}
    BLOCK2BASE/
{%- endblock -%}
--DATA--
return []
--EXPECT--
BLOCK1BASE/BLOCK2THEME/BLOCK1THEME/