error[E0038]: the trait alias `EqAlias` is not dyn compatible
  --> $DIR/object-fail.rs:7:17
   |
LL |     let _: &dyn EqAlias = &123;
   |                 ^^^^^^^ `EqAlias` is not dyn compatible
   |
note: for a trait to be dyn compatible it needs to allow building a vtable
      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
  --> $SRC_DIR/core/src/cmp.rs:LL:COL
   |
   = note: ...because it uses `Self` as a type parameter
   |
  ::: $DIR/object-fail.rs:3:7
   |
LL | trait EqAlias = Eq;
   |       ------- this trait is not dyn compatible...

error[E0191]: the value of the associated type `Item` in `Iterator` must be specified
  --> $DIR/object-fail.rs:9:17
   |
LL |     let _: &dyn IteratorAlias = &vec![123].into_iter();
   |                 ^^^^^^^^^^^^^ help: specify the associated type: `IteratorAlias<Item = Type>`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0038, E0191.
For more information about an error, try `rustc --explain E0038`.