error[E0597]: `*cell` does not live long enough
  --> $DIR/dropck.rs:19:40
   |
LL |     let ref_ = Box::leak(Box::new(Some(cell.borrow_mut())));
   |                                        ^^^^ borrowed value does not live long enough
...
LL | }
   | -
   | |
   | borrowed value only lives until here
   | borrow later used here, when `gen` is dropped

error[E0597]: `ref_` does not live long enough
  --> $DIR/dropck.rs:22:11
   |
LL |       gen = || {
   |  ___________^
LL | |         // but the generator can use it to drop a `Ref<'a, i32>`.
LL | |         let _d = ref_.take(); //~ ERROR `ref_` does not live long enough
LL | |         yield;
LL | |     };
   | |_____^ borrowed value does not live long enough
...
LL |   }
   |   -
   |   |
   |   borrowed value only lives until here
   |   borrow later used here, when `gen` is dropped

error: aborting due to 2 previous errors

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