error[E0223]: ambiguous associated type
  --> $DIR/issue-110052.rs:6:30
   |
LL |     for<'iter> dyn Validator<<&'iter I>::Item>:,
   |                              ^^^^^^^^^^^^^^^^
   |
help: use fully-qualified syntax
   |
LL |     for<'iter> dyn Validator<<&'iter I as IntoAsyncIterator>::Item>:,
   |                                        ++++++++++++++++++++
LL |     for<'iter> dyn Validator<<&'iter I as IntoIterator>::Item>:,
   |                                        +++++++++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0223`.