error: only enums are supported
 --> tests/compile-fail/no_enum.rs:6:1
  |
6 | #[repr(i8)]
  | ^

error[E0517]: attribute should be applied to an enum
 --> tests/compile-fail/no_enum.rs:6:8
  |
6 | #[repr(i8)]
  |        ^^
7 | pub(crate) struct EG();
  | ----------------------- not an enum