error[E0106]: missing lifetime specifier
  --> $DIR/issue-74918-missing-lifetime.rs:9:31
   |
LL |     type Item = IteratorChunk<T, S>;
   |                               ^ expected named lifetime parameter
   |
help: consider introducing a named lifetime parameter
   |
LL |     type Item<'a> = IteratorChunk<'a, T, S>;
   |              ++++                 +++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0106`.