| error[E0658]: use of unstable library feature `unstable_test_feature` | |
| --> $DIR/issue-28388-3.rs:7:5 | |
| | | |
| LL | use lint_stability::UnstableEnum::{}; | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
| | | |
| = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0658`. |