4 | struct Error;
  | -------------
  | |
  | doesn't satisfy `Error: eyre::kind::TraitKind`
  | doesn't satisfy `Error: std::convert::Into<eyre::ErrReport>`
  | doesn't satisfy `Error: std::fmt::Display`
...

          `&Error : eyre::kind::AdhocKind`
          `&Error : eyre::kind::TraitKind`
          `Error : eyre::kind::TraitKind`
  = help: items from traits can only be used if the trait is implemented and in scope
  = note: the following traits define an item `eyre_kind`, perhaps you need to implement one of them:
          candidate #1: `eyre::kind::AdhocKind`
          candidate #2: `eyre::kind::TraitKind`
          candidate #3: `eyre::kind::BoxedKind`

          `Error: std::convert::Into<eyre::ErrReport>`
          which is required by `Error: eyre::kind::TraitKind`
          `Error: std::fmt::Display`
          which is required by `&Error: eyre::kind::AdhocKind`
          `&Error: std::convert::Into<eyre::ErrReport>`
          which is required by `&Error: eyre::kind::TraitKind`