tests/ui/check-cfg/empty-names.stderr

   1 warning: unexpected `cfg` condition name
   2   --> $DIR/empty-names.rs:6:7
   3    |
   4 LL | #[cfg(unknown_key = "value")]
   5    |       ^^^^^^^^^^^^^^^^^^^^^
   6    |
   7    = note: `#[warn(unexpected_cfgs)]` on by default
   8
   9 warning: 1 warning emitted
  10