error[E0621]: explicit lifetime required in the type of `cont`
  --> $DIR/issue-13058.rs:14:26
   |
LL | fn check<'r, I: Iterator<Item=usize>, T: Itble<'r, usize, I>>(cont: &T) -> bool
   |                                                                     -- help: add explicit lifetime `'r` to the type of `cont`: `&'r T`
LL | {
LL |     let cont_iter = cont.iter();
   |                          ^^^^ lifetime `'r` required

error: aborting due to previous error

For more information about this error, try `rustc --explain E0621`.