PR c++/88183 - ICE with .* fold-expression.

build_m_component_ref can't handle type-dependent operands, so let's use the
default case; tsubst_copy_and_build also uses build_x_binary_op for
substituting a DOTSTAR_EXPR.

	* pt.c (fold_expression) [DOTSTAR_EXPR]: Remove special handling.

From-SVN: r269293

gcc/cp/ChangeLog

 2019-02-28  Jason Merrill  <jason@redhat.com>
 
+	PR c++/88183 - ICE with .* fold-expression.
+	* pt.c (fold_expression) [DOTSTAR_EXPR]: Remove special handling.
+
 	PR c++/86969 - ICE with constexpr if and recursive generic lambdas.
 	* class.c, lambda.c, pt.c: Revert earlier change.
 	* lambda.c (add_capture): Don't special-case capture of dependent

gcc/cp/pt.c

@@ -11784,8 +11784,6 @@ fold_expression (tree t, tree left, tree right, tsubst_flags_t complain)
     {
     case COMPOUND_EXPR:
       return build_x_compound_expr (input_location, left, right, complain);
-    case DOTSTAR_EXPR:
-      return build_m_component_ref (left, right, complain);
     default:
       return build_x_binary_op (input_location, code,
                                 left, TREE_CODE (left),