error[E0657]: `impl Trait` can only capture lifetimes bound at the fn or impl level
  --> $DIR/E0657.rs:20:31
   |
LL |     -> impl for<'a> Id<impl Lt<'a>>
   |                                ^^

error[E0657]: `impl Trait` can only capture lifetimes bound at the fn or impl level
  --> $DIR/E0657.rs:29:35
   |
LL |         -> impl for<'a> Id<impl Lt<'a>>
   |                                    ^^

error: aborting due to 2 previous errors

If you want more information on this error, try using "rustc --explain E0657"