error[E0432]: unresolved import `issue_36881_aux` --> $DIR/issue-36881.rs:5:9 | LL | use issue_36881_aux::Foo; | ^^^^^^^^^^^^^^^ maybe a missing crate `issue_36881_aux`? | = help: consider adding `extern crate issue_36881_aux` to use the `issue_36881_aux` crate error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0432`.