rust/src/test/ui/issues/issue-38091.stderr

warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/issue-38091.rs:2:12
   |
LL | #![feature(specialization)]
   |            ^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default
   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information

error[E0277]: the trait bound `(): Valid` is not satisfied
  --> $DIR/issue-38091.rs:8:5
   |
LL | trait Iterate<'a> {
   | ----------------- required by `Iterate`
...
LL |     default type Ty = ();
   |     ^^^^^^^^^^^^^^^^^^^^^ the trait `Valid` is not implemented for `()`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.