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

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

error: aborting due to 2 previous errors

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