1 error[E0507]: cannot move out of `self.tokens` which is behind a shared reference
2 --> $DIR/issue-2590.rs:11:9
5 | ^^^^^^^^^^^ move occurs because `self.tokens` has type `Vec<isize>`, which does not implement the `Copy` trait
7 error: aborting due to previous error
9 For more information about this error, try `rustc --explain E0507`.