error: cannot find attribute `foo` in this scope --> $DIR/custom_attribute.rs:3:3 | LL | #[foo] | ^^^ error: cannot find attribute `foo` in this scope --> $DIR/custom_attribute.rs:5:7 | LL | #[foo] | ^^^ error: cannot find attribute `foo` in this scope --> $DIR/custom_attribute.rs:7:7 | LL | #[foo] | ^^^ error: aborting due to 3 previous errors