error[E0597]: `a` does not live long enough
  --> $DIR/borrowing.rs:18:20
   |
18 |         (|| yield &a).resume()
   |          --        ^ does not live long enough
   |          |
   |          capture occurs here
19 |         //~^ ERROR: `a` does not live long enough
20 |     };
   |     - borrowed value only lives until here
...
29 | }
   | - borrowed value needs to live until here

error[E0597]: `a` does not live long enough
  --> $DIR/borrowing.rs:25:20
   |
24 |         || {
   |         -- capture occurs here
25 |             yield &a
   |                    ^ does not live long enough
...
28 |     };
   |     - borrowed value only lives until here
29 | }
   | - borrowed value needs to live until here

error: aborting due to 2 previous errors