error: Suspicious use of binary operator in `Add` impl --> $DIR/suspicious_arithmetic_impl.rs:14:20 | 14 | Foo(self.0 - other.0) | ^ | = note: `-D suspicious-arithmetic-impl` implied by `-D warnings` error: Suspicious use of binary operator in `AddAssign` impl --> $DIR/suspicious_arithmetic_impl.rs:20:23 | 20 | *self = *self - other; | ^ | = note: `-D suspicious-op-assign-impl` implied by `-D warnings` error: aborting due to 2 previous errors