| // Copyright 2015 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. |
| |
| // Test stack overflow triggered by evaluating the implications. To be |
| // WF, the type `Receipt<Complete>` would require that `<Complete as |
| // Async>::Cancel` be WF. This normalizes to `Receipt<Complete>` |
| // again, leading to an infinite cycle. Issue #23003. |
| |
| // pretty-expanded FIXME #23616 |
| |
| #![allow(dead_code)] |
| #![allow(unused_variables)] |
| |
| use std::marker::PhantomData; |
| |
| trait Async { |
| type Cancel; |
| } |
| |
| struct Receipt<A:Async> { |
| marker: PhantomData<A>, |
| } |
| |
| struct Complete { |
| core: Option<()>, |
| } |
| |
| impl Async for Complete { |
| type Cancel = Receipt<Complete>; |
| } |
| |
| fn foo(r: Receipt<Complete>) { } |
| |
| fn main() { } |