--- a/server/test/unittest_security.py	Fri Jul 06 09:00:33 2012 +0200
+++ b/server/test/unittest_security.py	Fri Jul 06 14:31:13 2012 +0200
@@ -23,8 +23,10 @@
 from cubicweb.devtools.testlib import CubicWebTC
 
 from cubicweb import Unauthorized, ValidationError, QueryError
+from cubicweb.schema import ERQLExpression
 from cubicweb.server.querier import check_read_access
 
+
 class BaseSecurityTC(CubicWebTC):
 
     def setup_database(self):
@@ -468,6 +470,28 @@
         cnx.rollback()
         cnx.close()
 
+    def test_yams_inheritance_and_security_bug(self):
+        oldperms = self.schema['Division'].permissions
+        try:
+            self.schema['Division'].permissions = {
+                'read': ('managers', ERQLExpression('X owned_by U')),
+                'add': ('managers', 'users'),
+                'update': ('managers', 'owners'),
+                'delete': ('managers', 'owners')}
+            self.login('iaminusersgrouponly')
+            querier = self.repo.querier
+            rqlst = querier.parse('Any X WHERE X is_instance_of Societe')
+            querier.solutions(self.session, rqlst, {})
+            querier._annotate(rqlst)
+            plan = querier.plan_factory(rqlst, {}, self.session)
+            plan.preprocess(rqlst)
+            self.assertEqual(
+                rqlst.as_string(),
+                '(Any X WHERE X is IN(SubDivision, Societe)) UNION (Any X WHERE X is Division, EXISTS(X owned_by %(B)s))')
+        finally:
+            self.schema['Division'].permissions = oldperms
+
+
 class BaseSchemaSecurityTC(BaseSecurityTC):
     """tests related to the base schema permission configuration"""