Volt: if generates a notice when the body is empty

[kolypto]

{% if true %}{% endif %}

Generates:

Notice: Undefined index: true_statements in index.php on line 22

Line 22 contains:

echo $application->handle()->getContent();

If I put anything into the body of the if block, the error is gone.

Bugged line: ext/mvc/view/engine/volt/parser.lemon:87

(Version: 1.2.6)