// Copyright 2015 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.

// Tests that transmuting from &T to &mut T is Undefined Behavior.

use std::mem::transmute;

fn main() {
    let _a: &mut u8 = unsafe { transmute(&1u8) };
    //~^ ERROR mutating transmuted &mut T from &T may cause undefined behavior
}