Index: django/views/debug.py
===================================================================
--- django/views/debug.py	(revision 3117)
+++ django/views/debug.py	(working copy)
@@ -112,6 +112,14 @@
         tb = tb.tb_next
 
     t = Template(TECHNICAL_500_TEMPLATE)
+
+    if not len(frames):
+        frames = [{
+            'filename': '<unknown>',
+            'function': '<unknown>',
+            'lineno': '??',
+        }]
+    
     c = Context({
         'exception_type': exc_type.__name__,
         'exception_value': exc_value,