Fixed a Python 3 bug.

--HG--
branch : trunk

diff --git a/jinja2/runtime.py b/jinja2/runtime.py
index 00b823e3e45dbfa0c4c5307ea6584e85e43b1b5a..98f4aec3fd800a72954d0c3900e0c4c0b74432ed 100644 (file)
--- a/jinja2/runtime.py
+++ b/jinja2/runtime.py
@@ -528,6 +528,9 @@ class StrictUndefined(Undefined):
     __slots__ = ()
     __iter__ = __unicode__ = __str__ = __len__ = __nonzero__ = __eq__ = \
         __ne__ = Undefined._fail_with_undefined_error
+    if sys.version_info >= (3, 0):
+        __bool__ = __nonzero__
+        del __nonzero__
 
 
 # remove remaining slots attributes, after the metaclass did the magic they