--- a/rset.py	Wed Dec 09 18:21:55 2015 +0100
+++ b/rset.py	Thu Dec 10 16:58:45 2015 +0100
@@ -483,7 +483,6 @@
         #     new attributes found in this resultset ?
         try:
             entity = req.entity_cache(eid)
-            entity._cw = req
         except KeyError:
             pass
         else: