warning: unknown lint: `test_unstable_lint` --> $DIR/warn-unknown-unstable-lint-inline.rs:4:1 | LL | #![allow(test_unstable_lint)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: the `test_unstable_lint` lint is unstable = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date note: the lint level is defined here --> $DIR/warn-unknown-unstable-lint-inline.rs:3:9 | LL | #![warn(unknown_lints)] | ^^^^^^^^^^^^^ warning: 1 warning emitted