src/test/ui/feature-gate-non_exhaustive.stderr

   1 error[E0658]: non exhaustive is an experimental feature (see issue #44109)
   2   --> $DIR/feature-gate-non_exhaustive.rs:13:1
   3    |
   4 13 | #[non_exhaustive] //~ERROR non exhaustive is an experimental feature (see issue #44109)
   5    | ^^^^^^^^^^^^^^^^^
   6    |
   7    = help: add #![feature(non_exhaustive)] to the crate attributes to enable
   8
   9 error: aborting due to previous error
  10