Twig context closure support

context_closure.patch

diff --git a/lib/twig/twig/lib/Twig/Template.php b/lib/twig/twig/lib/Twig/Template.php
index a001ca0..1f3c04b 100644
--- a/lib/twig/twig/lib/Twig/Template.php
+++ b/lib/twig/twig/lib/Twig/Template.php
@@ -337,7 +337,7 @@ abstract class Twig_Template implements Twig_TemplateInterface
     protected function getAttribute($object, $item, array $arguments = array(), $type = Twig_TemplateInterface::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
     {
         // array
-        if (Twig_TemplateInterface::METHOD_CALL !== $type) {
+        if (!is_object($object)) {
             $arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;

             if ((is_array($object) && array_key_exists($arrayItem, $object))
@@ -347,7 +347,11 @@ abstract class Twig_Template implements Twig_TemplateInterface
                     return true;
                 }

-                return $object[$arrayItem];
+                if(Twig_TemplateInterface::METHOD_CALL === $type) {
+                    return call_user_func_array($object[$arrayItem], $arguments);
+                } else {
+                    return $object[$arrayItem];
+                }
             }

             if (Twig_TemplateInterface::ARRAY_CALL === $type || !is_object($object)) {