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error[E0271]: type mismatch resolving `<fn() -> impl Sized {hi} as FnOnce<()>>::Output == Box<u8>`
--> $DIR/issue-98608.rs:4:39
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LL | fn hi() -> impl Sized { std::ptr::null::<u8>() }
| ---------- the found opaque type
...
LL | let b: Box<dyn Fn() -> Box<u8>> = Box::new(hi);
| ^^^^^^^^^^^^ expected struct `Box`, found opaque type
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= note: expected struct `Box<u8>`
found opaque type `impl Sized`
= note: required for the cast from `fn() -> impl Sized {hi}` to the object type `dyn Fn() -> Box<u8>`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0271`.
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