| // 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. |
| |
| use std::fmt; |
| |
| pub trait MethodType { |
| type GetProp: ?Sized; |
| } |
| |
| pub struct MTFn; |
| |
| impl<'a> MethodType for MTFn { //~ ERROR E0207 |
| type GetProp = fmt::Debug + 'a; |
| } |
| |
| fn bad(a: Box<<MTFn as MethodType>::GetProp>) -> Box<fmt::Debug+'static> { |
| a |
| } |
| |
| fn dangling(a: &str) -> Box<fmt::Debug> { |
| bad(Box::new(a)) |
| } |
| |
| fn main() { |
| let mut s = "hello".to_string(); |
| let x = dangling(&s); |
| s = String::new(); |
| println!("{:?}", x); |
| } |
