src/test/ui/pattern/usefulness/issue-3096-1.stderr

   1 error[E0004]: non-exhaustive patterns: type `()` is non-empty
   2   --> $DIR/issue-3096-1.rs:2:11
   3    |
   4 LL |     match () { }
   5    |           ^^
   6    |
   7    = note: the matched value is of type `()`
   8 help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
   9    |
  10 LL ~     match () {
  11 LL +         _ => todo!(),
  12 LL ~     }
  13    |
  14
  15 error: aborting due to previous error
  16
  17 For more information about this error, try `rustc --explain E0004`.