1 error[E0774]: `derive` may only be applied to structs, enums and unions
2 --> $DIR/issue-43023.rs:4:5
7 error[E0774]: `derive` may only be applied to structs, enums and unions
8 --> $DIR/issue-43023.rs:11:5
13 error[E0774]: `derive` may only be applied to structs, enums and unions
14 --> $DIR/issue-43023.rs:16:5
19 error: aborting due to 3 previous errors
21 For more information about this error, try `rustc --explain E0774`.