error[E0597]: `x` does not live long enough
  --> $DIR/unboxed-closure-region.rs:8:12
   |
LL |         || x //~ ERROR `x` does not live long enough
   |         -- ^ borrowed value does not live long enough
   |         |
   |         capture occurs here
LL |     };
   |     - borrowed value only lives until here
LL |     _f;
LL | }
   | - borrowed value needs to live until here

error: aborting due to previous error

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