error[E0277]: the trait bound `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>: std::iter::Iterator` is not satisfied
  --> $DIR/suggest-remove-refs-3.rs:14:19
   |
LL |       for (i, n) in & & &
   |  ___________________^
LL | |         & &v
LL | |         .iter()
LL | |         .enumerate() {
   | |____________________^ `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
   |
   = help: the trait `std::iter::Iterator` is not implemented for `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`
   = note: required by `std::iter::IntoIterator::into_iter`
help: consider removing 5 references `&`
   |
LL |     for (i, n) in v
LL |         .iter()
LL |         .enumerate() {
   |

error: aborting due to previous error

If you want more information on this error, try using "rustc --explain E0277"