1 error[E0369]: binary operation `+` cannot be applied to type `std::boxed::Box<isize>`
2 --> $DIR/issue-14915.rs:16:20
4 LL | println!("{}", x + 1);
7 = note: an implementation of `std::ops::Add` might be missing for `std::boxed::Box<isize>`
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0369`.