src/test/ui/consts/const-eval/extern_fat_pointer.rs

// build-pass (FIXME(62277): could be check-pass?)

#![feature(extern_types)]

extern {
    type Opaque;
}

const FOO: *const u8 = &42 as *const _ as *const Opaque as *const u8;

fn main() {
    let _foo = FOO;
}