error[E0597]: `y` does not live long enough
  --> $DIR/regions-nested-fns-2.rs:7:25
   |
LL |         |z| {
   |         --- value captured here
LL |             if false { &y } else { z }
   |                        -^
   |                        ||
   |                        |borrowed value does not live long enough
   |                        returning this value requires that `y` is borrowed for `'static`
...
LL | }
   | - `y` dropped here while still borrowed

error: aborting due to previous error

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