error[E0597]: `arena` does not live long enough --> $DIR/dropck-tarena-unsound-drop.rs:43:7 | LL | let arena: TypedArena = TypedArena::default(); | ----- binding `arena` declared here LL | f(&arena); | ^^^^^^ borrowed value does not live long enough LL | } | - | | | `arena` dropped here while still borrowed | borrow might be used here, when `arena` is dropped and runs the `Drop` code for type `TypedArena` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0597`.