File: missing-display.stderr

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error[E0277]: `MyError` doesn't implement `std::fmt::Display`
 --> tests/ui/missing-display.rs:4:10
  |
3 | #[derive(Error, Debug)]
  |          ----- in this derive macro expansion
4 | pub enum MyError {
  |          ^^^^^^^ `MyError` cannot be formatted with the default formatter
  |
  = 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`
 --> $RUST/core/src/error.rs
  |
  | pub trait Error: Debug + Display {
  |                          ^^^^^^^ required by this bound in `Error`
  = note: this error originates in the derive macro `Error` (in Nightly builds, run with -Z macro-backtrace for more info)