error[E0597]: `*m` does not live long enough --> $DIR/dropck-object-cycle.rs:27:31 | LL | let m : Box = make_val(); | - binding `m` declared here LL | assert_eq!(object_invoke1(&*m), (4,5)); | ^^^ borrowed value does not live long enough ... LL | } | - | | | `*m` dropped here while still borrowed | borrow might be used here, when `m` is dropped and runs the destructor for type `Box>` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0597`.