src/test/ui/issues/issue-40610.stderr

   1 error[E0369]: binary operation `+` cannot be applied to type `()`
   2   --> $DIR/issue-40610.rs:4:8
   3    |
   4 LL |     () + f(&[1.0]);
   5    |     -- ^ --------- ()
   6    |     |
   7    |     ()
   8    |
   9    = note: an implementation of `std::ops::Add` might be missing for `()`
  10
  11 error: aborting due to previous error
  12
  13 For more information about this error, try `rustc --explain E0369`.