= note: move occurs because `a[..]` has type `std::boxed::Box<i32>`, which does not implement the `Copy` trait
error[E0382]: use of moved value: `a[..]`
= note: move occurs because `a[..]` has type `std::boxed::Box<i32>`, which does not implement the `Copy` trait
error[E0382]: use of moved value: `a[..]`