# HG changeset patch
# User Sylvain Thénault <sylvain.thenault@logilab.fr>
# Date 1244565980 -7200
# Node ID 50beca829273efdbe9a07cfcdd2c40ff6896e30a
# Parent  65cbe891edac4ce0745fbd1df2d18e5126879c1b
nicer message on failure

diff -r 65cbe891edac -r 50beca829273 vregistry.py
--- a/vregistry.py	Tue Jun 09 18:30:42 2009 +0200
+++ b/vregistry.py	Tue Jun 09 18:46:20 2009 +0200
@@ -216,7 +216,8 @@
         # registered() is technically a classmethod but is not declared
         # as such because we need to compose registered in some cases
         vobject = obj.registered.im_func(obj, self)
-        assert not vobject in vobjects, vobject
+        assert not vobject in vobjects, vobject, \
+               'object %s is already registered' % vobject
         assert callable(vobject.__select__), vobject
         vobjects.append(vobject)
         try: