[svn] iteration over None does not raise exceptions any more. "fixes" #217

--HG--
branch : trunk

diff --git a/jinja/datastructure.py b/jinja/datastructure.py
index 0e7a76f13a4faa404c378fda7ca9d0c79fb351df..8d2be5cca152d68c33729f450d0bdf7617fedc9d 100644 (file)
--- a/jinja/datastructure.py
+++ b/jinja/datastructure.py
@@ -201,6 +201,8 @@ class LoopContext(object):
             self.push(seq)
 
     def push(self, seq):
+        if seq in (Undefined, None):
+            seq = ()
         self._stack.append({
             'index':            -1,
             'seq':              seq,