error[E0477]: the type `&'a ()` does not fulfill the required lifetime
  --> $DIR/unsound-region-obligation.rs:9:21
   |
LL |     type Item<'a> = &'a ();
   |                     ^^^^^^
   |
   = note: type must satisfy the static lifetime

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0477`.