error[E0477]: the type `<() as Yay<&'a ()>>::InnerStream<'s>` does not fulfill the required lifetime
  --> $DIR/issue-86218.rs:22:28
   |
LL |     type InnerStream<'s> = impl Stream<Item = i32> + 's;
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: type must outlive the lifetime `'s` as defined here as required by this binding
  --> $DIR/issue-86218.rs:22:22
   |
LL |     type InnerStream<'s> = impl Stream<Item = i32> + 's;
   |                      ^^

error: unconstrained opaque type
  --> $DIR/issue-86218.rs:22:28
   |
LL |     type InnerStream<'s> = impl Stream<Item = i32> + 's;
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `InnerStream` must be used in combination with a concrete type within the same module

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0477`.