tests/ui/type-alias-impl-trait/issue-98608.rs

   1 fn hi() -> impl Sized {
   2     std::ptr::null::<u8>()
   3 }
   4
   5 fn main() {
   6     let b: Box<dyn Fn() -> Box<u8>> = Box::new(hi);
   7     //~^ ERROR expected `fn() -> impl Sized {hi}` to be a fn item that returns `Box<u8>`, but it returns `impl Sized`
   8     let boxed = b();
   9     let null = *boxed;
  10     println!("{null:?}");
  11 }