warning: unnecessary lifetime parameter `'z`
  --> $DIR/issue-30438-c.rs:7:74
   |
LL | fn silly<'y, 'z>(_s: &'y Test<'z>) -> &'y <Test<'z> as Trait>::Out where 'z: 'static {
   |                                                                          ^^
   |
   = help: you can use the `'static` lifetime directly, in place of `'z`

error[E0515]: cannot return reference to local variable `x`
  --> $DIR/issue-30438-c.rs:10:5
   |
LL |     &x
   |     ^^ returns a reference to data owned by the current function

error: aborting due to previous error; 1 warning emitted

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