error: malformed `rustc_lint_query_instability` attribute input --> $DIR/query_stability_incorrect.rs:10:5 | LL | #[rustc_lint_query_instability(a)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[rustc_lint_query_instability]` error: attribute should be applied to a function definition --> $DIR/query_stability_incorrect.rs:5:1 | LL | #[rustc_lint_query_instability] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ LL | LL | struct Foo; | ----------- not a function definition error: aborting due to 2 previous errors