1 error[E0277]: `Error` doesn't implement `std::fmt::Debug`
2 --> $DIR/derives-span-Debug-enum.rs:13:6
5 | ^^^^^ `Error` cannot be formatted using `{:?}`
7 = help: the trait `std::fmt::Debug` is not implemented for `Error`
8 = note: add `#[derive(Debug)]` or manually implement `std::fmt::Debug`
9 = note: required because of the requirements on the impl of `std::fmt::Debug` for `&Error`
10 = note: required for the cast to the object type `dyn std::fmt::Debug`
11 = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
13 error: aborting due to previous error
15 For more information about this error, try `rustc --explain E0277`.