error[E0515]: cannot return reference to temporary value
  --> $DIR/issue-30438-a.rs:12:16
   |
LL |         return &Test { s: &self.s};
   |                ^------------------
   |                ||
   |                |temporary value created here
   |                returns a reference to data owned by the current function

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0515`.