| // Copyright 2016 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. |
| |
| // Coherence error results because we do not know whether `T: Foo<P>` or not |
| // for the second impl. |
| |
| use std::marker::PhantomData; |
| |
| pub trait Foo<P> {} |
| |
| impl <P, T: Foo<P>> Foo<P> for Option<T> {} //~ ERROR E0119 |
| |
| impl<T, U> Foo<T> for Option<U> { } |
| |
| fn main() {} |
