todo!() does not prevent errors in functions returning impl Trait

[JamieH01]

return position impl Trait is not coerced from !, leading to the following code to error:

trait MyTrait {}

fn my_function() -> impl MyTrait {
    todo!()
}

this code currently reports "the trait MyTrait is not implemented for ()". note that this code does work:

trait MyTrait {}

fn my_function<T: MyTrait>() -> T {
    todo!()
}

[JamieH01]

this issue already exists, and i didnt find that at first. sorry!