error: cannot find attribute `mutable_doc` in this scope --> $DIR/unknown-attr.rs:5:4 | LL | #![mutable_doc] | ^^^^^^^^^^^ error: cannot find attribute `dance` in this scope --> $DIR/unknown-attr.rs:8:3 | LL | #[dance] mod a {} | ^^^^^ error: cannot find attribute `dance` in this scope --> $DIR/unknown-attr.rs:11:3 | LL | #[dance] fn main() {} | ^^^^^ error: aborting due to 3 previous errors