re PR c++/66743 (ICE: tree check: expected record_type or union_type or…

re PR c++/66743 (ICE: tree check: expected record_type or union_type or qual_union_type, have underlying_type in for_each_template_parm_r, at cp/pt.c:8234)

	PR c++/66743
	* pt.c (for_each_template_parm_r) [UNDERLYING_TYPE]: Use
	TYPE_VALUES_RAW rather than TYPE_FIELDS.

From-SVN: r225365

gcc/cp/ChangeLog

+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

gcc/cp/pt.c

@@ -8255,7 +8255,7 @@ for_each_template_parm_r (tree *tp, int *walk_subtrees, void *d)
     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;

gcc/testsuite/g++.dg/cpp0x/alias-decl-51.C

+// 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)>;