Is it possible to go back to an Box<dny Error>?

[MaikKlein]

I am currently looking at https://docs.rs/tower-hyper/0.1.1/tower_hyper/server/struct.Server.html which has the following trait bound S::Error: Into<Box<dyn Error + Send + Sync>>,

Is there currently a way to converting back to a Box<dyn Error + Send + Sync>? I have briefly looked at the implementation and it seems we would need to implement Error for ErrorImpl.

Then we could do something like

impl Into<Box<dyn StdError + Send + Sync + 'static>> for Error {
    fn into(self) -> Box<dyn StdError + Send + Sync + 'static> {
        Box::new(self.inner)
    }
}

The problem is that the type was thrown away, and it is unclear to me how it should be implemented.

Any ideas?

[dtolnay]

I published 1.0.5 with this impl.

impl From<Error> for Box<dyn StdError + Send + Sync + 'static> {...}