error[E0597]: `i` does not live long enough --> $DIR/regions-steal-closure.rs:14:28 | LL | let mut cl_box = { | ---------- borrow later stored here LL | let mut i = 3; LL | box_it(Box::new(|| i += 1)) | -- ^ borrowed value does not live long enough | | | value captured here LL | }; | - `i` dropped here while still borrowed error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0597`.