File: issue-98608.rs

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rustc 1.88.0%2Bdfsg1-1
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fn hi() -> impl Sized {
    std::ptr::null::<u8>()
}

fn main() {
    let b: Box<dyn Fn() -> Box<u8>> = Box::new(hi);
    //~^ ERROR expected `hi` to return `Box<u8>`, but it returns `impl Sized`
    let boxed = b();
    let null = *boxed;
    println!("{null:?}");
}