error[E0107]: missing generics for associated type `StreamingIterator::Item`
  --> $DIR/issue-81862.rs:3:40
   |
LL |     fn next(&mut self) -> Option<Self::Item>;
   |                                        ^^^^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'a`
  --> $DIR/issue-81862.rs:2:10
   |
LL |     type Item<'a>;
   |          ^^^^ --
help: add missing lifetime argument
   |
LL |     fn next(&mut self) -> Option<Self::Item<'a>>;
   |                                        ~~~~~~~~

error: aborting due to previous error

For more information about this error, try `rustc --explain E0107`.