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[rustc.git] / src / test / ui / consts / const-eval / ub-uninhabit.rs

// stderr-per-bitwidth

use std::mem;

#[derive(Copy, Clone)]
enum Bar {}

#[repr(C)]
union MaybeUninit<T: Copy> {
    uninit: (),
    init: T,
}

const BAD_BAD_BAD: Bar = unsafe { MaybeUninit { uninit: () }.init };
//~^ ERROR it is undefined behavior to use this value

const BAD_BAD_REF: &Bar = unsafe { mem::transmute(1usize) };
//~^ ERROR it is undefined behavior to use this value

const BAD_BAD_ARRAY: [Bar; 1] = unsafe { MaybeUninit { uninit: () }.init };
//~^ ERROR it is undefined behavior to use this value

fn main() {}