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-error[E0373]: closure may outlive the current function, but it borrows `books`, which is owned by the current function
- --> $DIR/borrowck-escaping-closure-error-2.rs:11:14
- |
-LL | Box::new(|| books.push(4))
- | ^^ ----- `books` is borrowed here
- | |
- | may outlive borrowed value `books`
- |
-note: closure is returned here
- --> $DIR/borrowck-escaping-closure-error-2.rs:11:5
- |
-LL | Box::new(|| books.push(4))
- | ^^^^^^^^^^^^^^^^^^^^^^^^^^
-help: to force the closure to take ownership of `books` (and any other referenced variables), use the `move` keyword
- |
-LL | Box::new(move || books.push(4))
- | ++++
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0373`.