gistfile1.txt

error[E0277]: the size for values of type `dyn std::error::Error + std::marker::Send + std::marker::Sync` cannot be known at compilation time
  --> src/main.rs:9:78
   |
67 |             .map_err(|err| tide::Error::new(StatusCode::InternalServerError, err))?;
   |                                                                              ^^^ doesn't have a size known at compile-time
   |
   = help: the trait `std::marker::Sized` is not implemented for `dyn std::error::Error + std::marker::Send + std::marker::Sync`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because of the requirements on the impl of `std::error::Error` for `std::boxed::Box<dyn std::error::Error + std::marker::Send + std::marker::Sync>`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0425.
For more information about an error, try `rustc --explain E0277`.
error: could not compile `example`.

To learn more, run the command again with --verbose.

main.rs

use tide::{Body, Request, Response};
use tide::http::StatusCode;

fn main() {
    let mut app = tide::new();

    app.at("/").get(|mut _req: Request<()>| async {
        let _: String = surf::get("http://example.org").recv_json().await
            .map_err(|err| tide::Error::new(StatusCode::InternalServerError, err))?;
        // other stuff...
        let resp = Response::new(StatusCode::Ok);
        Ok(resp)
    });
}