error: lifetimes cannot use keyword names
  --> $DIR/cfg-keyword-lifetime.rs:4:16
   |
LL | fn hello() -> &'ref () {}
   |                ^^^^

error: lifetimes cannot use keyword names
  --> $DIR/cfg-keyword-lifetime.rs:11:20
   |
LL |     fn hello() -> &'ref () {}
   |                    ^^^^

error: aborting due to 2 previous errors