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

   1 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
   2   --> $DIR/issue-38091.rs:1:12
   3    |
   4 LL | #![feature(specialization)]
   5    |            ^^^^^^^^^^^^^^
   6    |
   7    = note: `#[warn(incomplete_features)]` on by default
   8    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
   9
  10 error[E0277]: the trait bound `(): Valid` is not satisfied
  11   --> $DIR/issue-38091.rs:9:5
  12    |
  13 LL |     type Ty: Valid;
  14    |     --------------- required by `Iterate::Ty`
  15 ...
  16 LL |     default type Ty = ();
  17    |     ^^^^^^^^^^^^^^^^^^^^^ the trait `Valid` is not implemented for `()`
  18
  19 error: aborting due to previous error; 1 warning emitted
  20
  21 For more information about this error, try `rustc --explain E0277`.