error[E0507]: cannot move out of `x.0`, as `x` is a captured variable in an `Fn` closure
  --> $DIR/issue-52663-span-decl-captured-variable.rs:8:26
   |
LL |        let x = (vec![22], vec![44]);
   |            - captured outer variable
LL |        expect_fn(|| drop(x.0));
   |                  --      ^^^ move occurs because `x.0` has type `Vec<i32>`, which does not implement the `Copy` trait
   |                  |
   |                  captured by this `Fn` closure
   |
help: consider cloning the value if the performance cost is acceptable
   |
LL |        expect_fn(|| drop(x.0.clone()));
   |                             ++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0507`.