File: issue-4735.rs

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rustc 1.85.0%2Bdfsg3-1
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//@ run-pass

use std::mem::transmute;

struct NonCopyable(*const u8);

impl Drop for NonCopyable {
    fn drop(&mut self) {
        let NonCopyable(p) = *self;
        let _v = unsafe { transmute::<*const u8, Box<isize>>(p) };
    }
}

pub fn main() {
    let t = Box::new(0);
    let p = unsafe { transmute::<Box<isize>, *const u8>(t) };
    let _z = NonCopyable(p);
}