error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:6:33
   |
LL |     while let Option::Some(x) = iter.next() {
   |                                 ^^^^^^^^^^^ help: try: `for x in iter { .. }`
   |
   = note: `-D clippy::while-let-on-iterator` implied by `-D warnings`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:11:25
   |
LL |     while let Some(x) = iter.next() {
   |                         ^^^^^^^^^^^ help: try: `for x in iter { .. }`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:16:25
   |
LL |     while let Some(_) = iter.next() {}
   |                         ^^^^^^^^^^^ help: try: `for _ in iter { .. }`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:95:29
   |
LL |         while let Some(v) = y.next() {
   |                             ^^^^^^^^ help: try: `for v in y { .. }`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:120:26
   |
LL |     while let Some(..) = values.iter().next() {
   |                          ^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in values.iter() { .. }`

error: aborting due to 5 previous errors