Index: Objects/structseq.c
===================================================================
--- Objects/structseq.c	(revision 82641)
+++ Objects/structseq.c	(working copy)
@@ -154,8 +154,11 @@
         char *cname, *crepr;
 
         cname = typ->tp_members[i].name;
-        if (cname == NULL)
+        if (cname == NULL) {
+            /* XXX: I am not sure what exception is appropriate here */
+            PyErr_Format(PyExc_ValueError, "In structseq_repr()  member %d name is NULL", i);
             return NULL;
+        }
         val = PyStructSequence_GET_ITEM(obj, i);
         repr = PyObject_Repr(val);
         if (repr == NULL)