error[E0425]: cannot find value `foo` in this scope --> $DIR/issue-38586.rs:6:10 | LL | #[derive(A)] | ^ not found in this scope | = note: this error originates in the derive macro `A` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0425`.