1 error[E0277]: cannot add `()` to `usize`
2 --> $DIR/issue-13352.rs:19:13
4 LL | 2_usize + (loop {});
5 | ^ no implementation for `usize + ()`
7 = help: the trait `std::ops::Add<()>` is not implemented for `usize`
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0277`.