-// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
trait Foo = Default;
+//~^ ERROR trait aliases are experimental
+
+macro_rules! accept_item {
+ ($i:item) => {}
+}
+
+accept_item! {
+ trait Foo = Ord + Eq;
+ //~^ ERROR trait aliases are experimental
+}
fn main() {}