1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Ensure that OIBIT checks `T` when it encounters a `PhantomData<T>` field, instead of checking
12 // the `PhantomData<T>` type itself (which almost always implements an auto trait)
14 #![feature(optin_builtin_traits)]
16 use std::marker::{PhantomData};
18 unsafe auto trait Zen {}
20 unsafe impl<'a, T: 'a> Zen for &'a T where T: Sync {}
22 struct Guard<'a, T: 'a> {
23 _marker: PhantomData<&'a T>,
28 fn is_zen<T: Zen>(_: T) {}
30 fn not_sync<T>(x: Guard<T>) {
32 //~^ ERROR `T` cannot be shared between threads safely [E0277]
35 fn nested_not_sync<T>(x: Nested<Guard<T>>) {
37 //~^ ERROR `T` cannot be shared between threads safely [E0277]