| // Copyright 2018 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. |
| |
| #[repr(usize)] |
| #[derive(Copy, Clone)] |
| enum Enum { |
| A = 0, |
| } |
| |
| union Foo { |
| a: &'static u8, |
| b: Enum, |
| } |
| |
| // A pointer is guaranteed non-null |
| const BAD_ENUM: Enum = unsafe { Foo { a: &1 }.b}; |
| //~^ ERROR this constant likely exhibits undefined behavior |
| |
| fn main() { |
| } |
