1 error: cannot find attribute `foo` in this scope
2 --> $DIR/custom_attribute.rs:3:3
7 error: cannot find attribute `foo` in this scope
8 --> $DIR/custom_attribute.rs:5:7
13 error: cannot find attribute `foo` in this scope
14 --> $DIR/custom_attribute.rs:7:7
19 error: aborting due to 3 previous errors