error: encountered duplicate `#[derive(Debug)]` parameter --> $DIR/duplicate-derive-debug.rs:4:27 | 4 | #[derive(Debug)] #[derive(Debug)] | ^^^^^ error: previous `#[derive(Debug)]` parameter here --> $DIR/duplicate-derive-debug.rs:4:10 | 4 | #[derive(Debug)] #[derive(Debug)] | ^^^^^