message: I'm not sure why those attributes are unused in Rust 1.6
diff: // except according to those terms.
  #![cfg(windows)]
  #![deny(unused, unused_qualifications)]
  +#![warn(unused_attributes)]
  #![allow(bad_style, overflowing_literals, unused_macros)]
  #![recursion_limit = "128"]
  #![no_std]
  