PR c++/66743
	* pt.c (for_each_template_parm_r) [UNDERLYING_TYPE]: Use
	TYPE_VALUES_RAW rather than TYPE_FIELDS.
From-SVN: r225365
+2015-07-02  Jason Merrill  <jason@redhat.com>
+
+       PR c++/66743
+       * pt.c (for_each_template_parm_r) [UNDERLYING_TYPE]: Use
+       TYPE_VALUES_RAW rather than TYPE_FIELDS.
+
 2015-07-02  Andrew Sutton  <andrew.n.sutton@gmail.com>
 
        * pt.c (type_dependent_expression_p): Handle expressions
 
     case TYPEOF_TYPE:
     case UNDERLYING_TYPE:
       if (pfd->include_nondeduced_p
-         && for_each_template_parm (TYPE_FIELDS (t), fn, data,
+         && for_each_template_parm (TYPE_VALUES_RAW (t), fn, data,
                                     pfd->visited, 
                                     pfd->include_nondeduced_p))
        return error_mark_node;
 
--- /dev/null
+// PR c++/66743
+// { dg-do compile { target c++11 } }
+
+template< class T >
+struct
+  type_is { using type = T; };
+
+template< class T >
+  using underlying_type = type_is<__underlying_type(T)>;