error[E0506]: cannot assign to `v[_]` because it is borrowed --> $DIR/drop-no-may-dangle.rs:18:9 | LL | let p: WrapMayNotDangle<&usize> = WrapMayNotDangle { value: &v[0] }; | ----- `v[_]` is borrowed here ... LL | v[0] += 1; | ^^^^^^^^^ `v[_]` is assigned to here but it was already borrowed ... LL | } | - borrow might be used here, when `p` is dropped and runs the `Drop` code for type `WrapMayNotDangle` error[E0506]: cannot assign to `v[_]` because it is borrowed --> $DIR/drop-no-may-dangle.rs:21:5 | LL | let p: WrapMayNotDangle<&usize> = WrapMayNotDangle { value: &v[0] }; | ----- `v[_]` is borrowed here ... LL | v[0] += 1; | ^^^^^^^^^ `v[_]` is assigned to here but it was already borrowed LL | } | - borrow might be used here, when `p` is dropped and runs the `Drop` code for type `WrapMayNotDangle` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0506`.