XmlSlurper is foobar

According to the documentation for xmlSlurper the following should work.

def FOO_BAR_XML = """
 <a>
  <b>
   <c>
    <d>result!<x/><y/><z/></d>
   </c>
  </b>
 </a>
"""

 def foo = new XmlSlurper().parseText( FOO_BAR_XML )
 log.info foo."a.b.c.d".text()
 log.info foo."*.d".text()
  assert "result" == foo."a.b.c.d".text() , foo."a.b.c.d".text()
  assert "result" == foo."*".text() , foo."*.d".text()
  

1) .text() always returns an empty String.
2) ."*" (and "**") always fails.