| // Copyright 2014 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. |
| |
| // Regression test for #24085. Errors were occurring in region |
| // inference due to the requirement that `'a:b'`, which was getting |
| // incorrectly translated in connection with the closure below. |
| |
| #[cfg(feature = "use_core")] |
| extern crate core; |
| |
| #[macro_use] |
| extern crate derivative; |
| |
| #[derive(Derivative)] |
| #[derivative(Copy,Clone)] |
| #[allow(dead_code)] |
| struct Path<'a:'b, 'b> { |
| x: &'a i32, |
| tail: Option<&'b Path<'a, 'b>> |
| } |
| |
| #[allow(dead_code, unconditional_recursion)] |
| fn foo<'a,'b,F>(p: Path<'a, 'b>, mut f: F) |
| where F: for<'c> FnMut(Path<'a, 'c>) { |
| foo(p, |x| f(x)) |
| } |
| |
| #[test] |
| fn main() { } |