rust/src/test/compile-fail/kindck-owned-trait.rs

// Copyright 2012 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 { fn foo(); }

fn to_foo<T: Copy foo>(t: T) -> foo {
    t as foo //~ ERROR value may contain borrowed pointers; use `owned` bound
}

fn to_foo2<T: Copy foo Owned>(t: T) -> foo {
    t as foo
}

fn main() {}