From 7c8acf712e46fa3df8d83514be3d67e9b7635455 Mon Sep 17 00:00:00 2001
From: Andrew Winter <awinter@sbstrm.co.jp>
Date: Fri, 12 Apr 2013 10:57:33 +0900
Subject: [PATCH] Prevent extensions from clobbering all globals.

---
 lib/Twig/Environment.php |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/lib/Twig/Environment.php b/lib/Twig/Environment.php
index ff089c2..32b026a 100644
--- a/lib/Twig/Environment.php
+++ b/lib/Twig/Environment.php
@@ -1099,7 +1099,12 @@ class Twig_Environment
     {
         $globals = array();
         foreach ($this->extensions as $extension) {
-            $globals = array_merge($globals, $extension->getGlobals());
+            $extGlob = $extension->getGlobals();
+            if (!is_array($extGlob)) {
+                throw new UnexpectedValueException(sprintf('"%s::getGlobals()" must return an array of globals.', get_class($extension)));
+            }
+            
+            $globals = array_merge($globals, $extGlob);
         }
 
         return array_merge($globals, $this->staging->getGlobals());
-- 
1.7.2.5