rust/src/test/compile-fail/trait-bounds-not-on-bare-trait.rs

// Copyright 2013 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 {
}

// This should emit the less confusing error, not the more confusing one.

fn foo(_x: Foo:Send) {
    //~^ERROR reference to trait `Foo` where a type is expected; try `Box<Foo>` or `&Foo`
}

fn main() { }