Index: django/template/loader_tags.py
===================================================================
--- django/template/loader_tags.py	(revision 10864)
+++ django/template/loader_tags.py	(working copy)
@@ -21,8 +21,9 @@
         # Save context in case of block.super().
         self.context = context
         context['block'] = self
+        scoped_block = context.dicts[0]
         result = self.nodelist.render(context)
-        context.pop()
+        context.dicts.remove(scoped_block)
         return result
 
     def super(self):