re PR c++/67411 (internal compiler error: in tsubst_copy, at cp/pt.c:13473)

	PR c++/67411
	* decl2.c (decl_maybe_constant_var_p): Use DECL_HAS_VALUE_EXPR_P.

From-SVN: r231869

gcc/cp/ChangeLog

 2015-12-20  Jason Merrill  <jason@redhat.com>
 
 	PR c++/67411
+	* decl2.c (decl_maybe_constant_var_p): Use DECL_HAS_VALUE_EXPR_P.
+
+	PR c++/67411
 	* lambda.c (generic_lambda_fn_p): Split out from...
 	(maybe_add_lambda_conv_op): ...here.
 	* semantics.c (process_outer_var_ref): Don't defer maybe-constant

gcc/cp/decl2.c

@@ -4222,7 +4222,7 @@ decl_maybe_constant_var_p (tree decl)
     return false;
   if (DECL_DECLARED_CONSTEXPR_P (decl))
     return true;
-  if (DECL_VALUE_EXPR (decl))
+  if (DECL_HAS_VALUE_EXPR_P (decl))
     /* A proxy isn't constant.  */
     return false;
   return (CP_TYPE_CONST_NON_VOLATILE_P (type)