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error[E0277]: `MyError` doesn't implement `std::fmt::Display`
--> $DIR/issue-71363.rs:4:6
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4 | impl std::error::Error for MyError {}
| ^^^^^^^^^^^^^^^^^ `MyError` cannot be formatted with the default formatter
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= help: the trait `std::fmt::Display` is not implemented for `MyError`
= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
note: required by a bound in `std::error::Error`
error[E0277]: `MyError` doesn't implement `Debug`
--> $DIR/issue-71363.rs:4:6
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4 | impl std::error::Error for MyError {}
| ^^^^^^^^^^^^^^^^^ `MyError` cannot be formatted using `{:?}`
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= help: the trait `Debug` is not implemented for `MyError`
= note: add `#[derive(Debug)]` to `MyError` or manually `impl Debug for MyError`
note: required by a bound in `std::error::Error`
help: consider annotating `MyError` with `#[derive(Debug)]`
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3 | #[derive(Debug)]
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error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
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