--- a/web/views/debug.py	Wed May 25 08:51:45 2011 +0200
+++ b/web/views/debug.py	Wed May 25 10:58:43 2011 +0200
@@ -1,4 +1,4 @@
-# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
 #
 # This file is part of CubicWeb.
@@ -133,6 +133,9 @@
             if sessions:
                 w(u'<ul>')
                 for session in sessions:
+                    if not session.cnx:
+                        w(u'<li>%s (NO CNX)</li>' % session.sessionid)
+                        continue
                     try:
                         last_usage_time = session.cnx.check()
                     except BadConnectionId: