rust/src/test/run-pass/issue-21721.rs

// 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.

// pretty-expanded FIXME #23616

fn main() {
    static NONE: Option<((), &'static u8)> = None;
    let ptr = unsafe {
        *(&NONE as *const _ as *const *const u8)
    };
    assert!(ptr.is_null());
}