From c1c11111ba52b36be4438d5110528d85bfb82828 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Mon, 21 May 2007 23:52:15 +0200
Subject: [PATCH] [svn] iteration over an undefined singleton is now handled in
 the singleton itself and not the loop context

--HG--
branch : trunk
---
 jinja/datastructure.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/jinja/datastructure.py b/jinja/datastructure.py
index 22864b5..a2350ab 100644
--- a/jinja/datastructure.py
+++ b/jinja/datastructure.py
@@ -324,7 +324,10 @@ class LoopContext(object):
         Push a sequence to the loop stack. This is used by the
         recursive for loop.
         """
-        if seq in (Undefined, None):
+        # iteration over None is catched, but we don't catch iteration
+        # over undefined because that behavior is handled in the
+        # undefined singleton
+        if seq is None:
             seq = ()
             length = 0
         else:
-- 
2.26.2