Resolve breakage

src/test/ui/feature-gate-optimize_attribute.rs

@@ -1,12 +1,3 @@
-// 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.
 #![crate_type="rlib"]
 #![optimize(speed)] //~ ERROR #54882
 
@@ -19,7 +10,9 @@ fn size() {}
 #[optimize(speed)] //~ ERROR #54882
 fn speed() {}
 
-#[optimize(banana)] //~ ERROR #54882
+#[optimize(banana)]
+//~^ ERROR #54882
+//~| ERROR E0722
 fn not_known() {}
 
 }