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