diff -r 37505d64e57b -r f2e327a7c5de thirdparty/google_appengine/google/appengine/api/validation.py
--- a/thirdparty/google_appengine/google/appengine/api/validation.py	Tue Sep 16 01:18:49 2008 +0000
+++ b/thirdparty/google_appengine/google/appengine/api/validation.py	Tue Sep 16 02:28:33 2008 +0000
@@ -57,7 +57,7 @@
 
   def __init__(self, message, cause=None):
     """Initialize exception."""
-    if hasattr(cause, 'args'):
+    if hasattr(cause, 'args') and cause.args:
       Error.__init__(self, message, *cause.args)
     else:
       Error.__init__(self, message)