rust/src/test/run-pass/issue-20644.rs

// 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.

// A reduced version of the rustbook ice. The problem this encountered
// had to do with trans ignoring binders.

#![feature(associated_types)]
#![feature(macro_rules)]

use std::iter;
use std::os;
use std::old_io::File;

#[allow(unused)]
pub fn parse_summary<R: Reader>(_: R, _: &Path) {
     let path_from_root = Path::new("");
     Path::new(iter::repeat("../")
               .take(path_from_root.components().count() - 1)
               .collect::<String>());
 }

fn main() {
    let cwd = os::getcwd().unwrap();
    let src = cwd.clone();
    let summary = File::open(&src.join("SUMMARY.md"));
    let _ = parse_summary(summary, &src);
}