src/test/ui/borrowck/regions-escape-unboxed-closure.stderr

   1 error[E0521]: borrowed data escapes outside of closure
   2   --> $DIR/regions-escape-unboxed-closure.rs:5:23
   3    |
   4 LL |     let mut x: Option<&isize> = None;
   5    |         ----- `x` declared here, outside of the closure body
   6 LL |     with_int(&mut |y| x = Some(y));
   7    |                    -  ^^^^^^^^^^^ `y` escapes the closure body here
   8    |                    |
   9    |                    `y` is a reference that is only valid in the closure body
  10
  11 error: aborting due to previous error
  12