error: cfg attributes not allowed on this item --> ui_tests/module_cfg_fn.rs:11:5 | 11 | #[cfg(not(feature = "foo"))] | ^ error[E0433]: failed to resolve: use of undeclared crate or module `test_module` --> ui_tests/module_cfg_fn.rs:22:8 | 22 | if test_module::test_fn(n) { | ^^^^^^^^^^^ use of undeclared crate or module `test_module`