error[E0308]: mismatched types
  --> $DIR/return-dyn-type-mismatch-2.rs:7:5
   |
LL | fn foo<T>() -> dyn Trait<T>
   |                ------------ expected `(dyn Trait<T> + 'static)` because of return type
...
LL |     42
   |     ^^ expected `dyn Trait`, found integer
   |
   = note: expected trait object `(dyn Trait<T> + 'static)`
                      found type `{integer}`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.