error[E0597]: `i` does not live long enough
  --> $DIR/regions-steal-closure.rs:24:28
   |
LL |         box_it(Box::new(|| i += 1)) //~ ERROR `i` does not live long enough
   |                         -- ^ borrowed value does not live long enough
   |                         |
   |                         capture occurs here
LL |     };
   |     - borrowed value only lives until here
LL |     cl_box.cl.call_mut(());
LL | }
   | - borrowed value needs to live until here

error: aborting due to previous error

For more information about this error, try `rustc --explain E0597`.