The following code replacing lines 510-519 in
  org.apache.tools.ant.module.bridge.impl.BridgeImpl
     method gutProject(Project p)

  will support the change in ant's IntrospectionHelper (field "helpers" was
changed to "HELPERS").

  Added benefit... JUnit4 tests will function native with this patch, and
pointing ant directory to a 1.7.0RC1+ build of ant.

<CODE>
            boolean found16helpers = false;
            boolean found17helpers = false;
            try {
                Field helpersF = IntrospectionHelper.class.getDeclaredField
("helpers");
                helpersF.setAccessible (true);
                Object helpersO = helpersF.get (null);
                Map helpersM = (Map) helpersO;
                helpersM.clear ();
                found16helpers = true;
            } catch (NoSuchFieldException nsfe) {
                Field helpers17F = IntrospectionHelper.class.getDeclaredField
("HELPERS");
                helpers17F.setAccessible (true);
                Object helpers170 = helpers17F.get (null);
                Map helpers17M = (Map) helpers170;
                helpers17M.clear ();
                found17helpers = true;
            }
</CODE>