error: malformed `unstable` attribute input --> $DIR/stability-attribute-sanity-4.rs:8:5 | LL | #[unstable] | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]` error: malformed `unstable` attribute input --> $DIR/stability-attribute-sanity-4.rs:11:5 | LL | #[unstable = "b"] | ^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]` error: malformed `stable` attribute input --> $DIR/stability-attribute-sanity-4.rs:14:5 | LL | #[stable] | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]` error: malformed `stable` attribute input --> $DIR/stability-attribute-sanity-4.rs:17:5 | LL | #[stable = "a"] | ^^^^^^^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]` error[E0542]: missing 'since' --> $DIR/stability-attribute-sanity-4.rs:21:5 | LL | #[deprecated] | ^^^^^^^^^^^^^ error[E0542]: missing 'since' --> $DIR/stability-attribute-sanity-4.rs:25:5 | LL | #[deprecated = "a"] | ^^^^^^^^^^^^^^^^^^^ error: aborting due to 6 previous errors For more information about this error, try `rustc --explain E0542`.