error[E0505]: cannot move out of `alloc` because it is borrowed --> $DIR/leak-alloc.rs:26:10 | LL | let alloc = Alloc {}; | ----- binding `alloc` declared here LL | let boxed = Box::new_in(10, alloc.by_ref()); | -------------- borrow of `alloc` occurs here LL | let theref = Box::leak(boxed); LL | drop(alloc); | ^^^^^ move out of `alloc` occurs here LL | LL | use_value(*theref) | ------- borrow later used here error: aborting due to previous error For more information about this error, try `rustc --explain E0505`.