error[E0505]: cannot move out of `x` because it is borrowed --> $DIR/augmented-assignments.rs:16:5 | LL | x | - borrow of `x` occurs here ... LL | x; | ^ move out of `x` occurs here error[E0596]: cannot borrow `y` as mutable, as it is not declared as mutable --> $DIR/augmented-assignments.rs:23:5 | LL | y | ^ cannot borrow as mutable | help: consider changing this to be mutable | LL | let mut y = Int(2); | +++ error: aborting due to 2 previous errors Some errors have detailed explanations: E0505, E0596. For more information about an error, try `rustc --explain E0505`.