error[E0277]: the trait bound `Error: From<UninitializedFieldError>` is not satisfied
  --> tests/compile-fail/custom_error_no_from.rs:21:55
   |
21 | #[builder(build_fn(validate = "check_person", error = "Error"))]
   |                                                       ^^^^^^^ the trait `From<UninitializedFieldError>` is not implemented for `Error`
   |
   = note: required because of the requirements on the impl of `Into<Error>` for `UninitializedFieldError`