error[E0597]: `s` does not live long enough
  --> $DIR/issue-55850.rs:28:16
   |
LL |         yield &s[..]
   |                ^ borrowed value does not live long enough
LL |     })
   |     - borrowed value only lives until here
   |
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 25:8...
  --> $DIR/issue-55850.rs:25:8
   |
LL | fn bug<'a>() -> impl Iterator<Item = &'a str> {
   |        ^^

error: aborting due to previous error

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