error[E0382]: use of moved value: `x`
  --> $DIR/move-in-guard-1.rs:10:24
   |
LL |     let x: Box<_> = box 1;
   |         - move occurs because `x` has type `std::boxed::Box<i32>`, which does not implement the `Copy` trait
...
LL |         (1, _) if take(x) => (),
   |                        - value moved here
LL |         (_, 2) if take(x) => (),
   |                        ^ value used here after move

error: aborting due to previous error

For more information about this error, try `rustc --explain E0382`.