1 error[E0277]: `MyError` doesn't implement `std::fmt::Display`
2 --> $DIR/issue-71363.rs:4:28
4 4 | impl std::error::Error for MyError {}
5 | ^^^^^^^ `MyError` cannot be formatted with the default formatter
7 = help: the trait `std::fmt::Display` is not implemented for `MyError`
8 = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
9 note: required by a bound in `std::error::Error`
10 --> $SRC_DIR/core/src/error.rs:LL:COL
12 error[E0277]: `MyError` doesn't implement `Debug`
13 --> $DIR/issue-71363.rs:4:28
15 4 | impl std::error::Error for MyError {}
16 | ^^^^^^^ `MyError` cannot be formatted using `{:?}`
18 = help: the trait `Debug` is not implemented for `MyError`
19 = note: add `#[derive(Debug)]` to `MyError` or manually `impl Debug for MyError`
20 note: required by a bound in `std::error::Error`
21 --> $SRC_DIR/core/src/error.rs:LL:COL
22 help: consider annotating `MyError` with `#[derive(Debug)]`
27 error: aborting due to 2 previous errors
29 For more information about this error, try `rustc --explain E0277`.