fixed block names unicity

lib/Twig/Parser.php

@@ -50,7 +50,7 @@ class Twig_Parser implements Twig_ParserInterface
 
     public function getVarName()
     {
-        return sprintf('__internal_%s', hash('sha256', __METHOD__.$this->varNameSalt++));
+        return sprintf('__internal_%s', hash('sha256', __METHOD__.$this->stream->getSourceContext()->getCode().$this->varNameSalt++));
     }
 
     /**

test/Twig/Tests/Fixtures/regression/block_names_unicity.test

@@ -0,0 +1,19 @@
+--TEST--
+Block names are unique per template
+--TEMPLATE--
+{% extends 'layout' %}
+{% block content -%}
+    {% filter title -%}
+        second
+    {% endfilter %}
+{% endblock %}
+--TEMPLATE(layout)--
+{% filter title -%}
+    first
+{% endfilter %}
+{% block content %}{% endblock %}
+--DATA--
+return array();
+--EXPECT--
+First
+Second