Index: Objects/methodobject.c
===================================================================
--- Objects/methodobject.c	(revision 67238)
+++ Objects/methodobject.c	(working copy)
@@ -373,7 +373,9 @@
 		}
 		chain = chain->link;
 	}
-	PyErr_SetString(PyExc_AttributeError, name);
+	PyErr_Format(PyExc_AttributeError,
+			"'%.50s' object has no attribute '%.400s'",
+			self->ob_type->tp_name, name);
 	return NULL;
 }