1 error[E0369]: binary operation `+` cannot be applied to type `()`
2 --> $DIR/for-loop-type-error.rs:2:13
4 LL | let x = () + (); //~ ERROR binary operation
7 = note: an implementation of `std::ops::Add` might be missing for `()`
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0369`.