error[E0597]: `db` does not live long enough
 --> tests/fail/iterator_outlive_db.rs:6:9
  |
4 |     let _iter = {
  |         ----- borrow later stored here
5 |         let db = DB::open_default("foo").unwrap();
6 |         db.iterator(IteratorMode::Start)
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ borrowed value does not live long enough
7 |     };
  |     - `db` dropped here while still borrowed