| error[E0658]: use of unstable library feature 'unstable_test_feature' | |
| --> $DIR/issue-28388-3.rs:17:5 | |
| | | |
| LL | use lint_stability::UnstableEnum::{}; | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
| | | |
| = help: add #![feature(unstable_test_feature)] to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |