File: promoted_const_fn_fail.rs

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rustc 1.87.0%2Bdfsg1-1
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#[repr(C)]
union Bar {
    a: &'static u8,
    b: usize,
}

const fn bar() -> u8 {
    unsafe {
        // this will error as long as this test
        // is run on a system whose pointers need more
        // than 8 bits
        Bar { a: &42 }.b as u8
    }
}

fn main() {
    let x: &'static u8 = &(bar() + 1); //~ ERROR temporary value dropped while borrowed
    let y = *x;
    unreachable!();
}