error: at least one trait must be specified
  --> $DIR/generic_nondefining_use.rs:5:20
   |
LL | type Cmp<T> = impl 'static;
   |                    ^^^^^^^

error: defining opaque type use does not fully define opaque type
  --> $DIR/generic_nondefining_use.rs:11:1
   |
LL | / fn cmp() -> Cmp<u32> {
LL | |     5u32
LL | | }
   | |_^

error: could not find defining uses
  --> $DIR/generic_nondefining_use.rs:5:1
   |
LL | type Cmp<T> = impl 'static;
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors