// 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.

// Previously the closure's argument would be inferred to
// <S as ITrait<'a>>::Item, causing an error in MIR type
// checking

trait ITrait<'a> {type Item;}

struct S {}

impl<'a> ITrait<'a> for S { type Item = &'a mut usize; }

fn m<T, I, F>(_: F)
    where I: for<'a> ITrait<'a>,
          F: for<'a> FnMut(<I as ITrait<'a>>::Item) { }


fn main() {
    m::<usize,S,_>(|x| { *x += 1; });
}