warning: unknown lint: `unqualified_local_imports`
  --> $DIR/feature-gate-unqualified-local-imports.rs:3:1
   |
LL | #![allow(unqualified_local_imports)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: the `unqualified_local_imports` lint is unstable
   = help: add `#![feature(unqualified_local_imports)]` 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   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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: `#[warn(unknown_lints)]` on by default

warning: 1 warning emitted