The test is:

<created by="Tim Mills" on="2016-08-19"/>

    <test>let $module := function-lookup(fn:QName('http://www.w3.org/2005/xpath-functions', 'load-xquery-module'), 1)("http://www.w3.org/fots/fn/load-xquery-module/valid/module")
      return
        let $vars := $module("variables"),
         $fns := $module("functions")
        return
          let $var-values := ($vars(QName($module-ns, "var1")), $vars(QName($module-ns, "var2"))),
           $fns-values := ($fns(QName($module-ns, "func1"))(0)(), $fns(QName($module-ns, "func2"))(0)())
          return
            ($var-values, $fns-values)
    </test>

It uses a variable $module-ns which has not been declared.