Here's the fix:

--- Lib/compiler/pycodegen.py   2001/10/18 21:57:37     1.56
+++ Lib/compiler/pycodegen.py   2001/11/07 17:02:57
@@ -1333,6 +1333,7 @@
         elif self.op != node.flags:
             raise ValueError, "mixed ops in stmt"
     visitAssAttr = visitAssName
+    visitSubscript = visitAssName

 class Delegator:
     """Base class to support delegation for augmented assignment nodes