error: unsupported attribute. It only supports `#[repr]` and `#[derive]`
 --> tests/failed/03-unsupported-attribute.rs:4:1
  |
4 | #[other_attr]
  | ^

error: unsupported attribute
 --> tests/failed/03-unsupported-attribute.rs:9:5
  |
9 |     #[other_attr]
  |     ^