error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:16:5
   |
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:21:5
   |
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:26:5
   |
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:102:9
   |
LL |         while let Some([..]) = it.next() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for [..] in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:109:9
   |
LL |         while let Some([_x]) = it.next() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for [_x] in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:122:9
   |
LL |         while let Some(x @ [_]) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x @ [_] in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:142:9
   |
LL |         while let Some(_) = y.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in y`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:199:9
   |
LL |         while let Some(m) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for m in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:210:5
   |
LL |     while let Some(n) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for n in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:212:9
   |
LL |         while let Some(m) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for m in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:221:9
   |
LL |         while let Some(m) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for m in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:230:9
   |
LL |         while let Some(m) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for m in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:247:9
   |
LL |         while let Some(m) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for m in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:262:13
   |
LL |             while let Some(i) = self.0.next() {
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for i in self.0.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:294:13
   |
LL |             while let Some(i) = self.0.0.0.next() {
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for i in self.0.0.0.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:323:5
   |
LL |     while let Some(n) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for n in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:335:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:349:5
   |
LL |     while let Some(x) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:360:5
   |
LL |     while let Some(x) = it.0.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it.0.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:395:5
   |
LL |     while let Some(x) = s.x.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in s.x.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:402:5
   |
LL |     while let Some(x) = x[0].next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in x[0].by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:410:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:420:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:430:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it.by_ref()`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:440:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it`

error: this loop could be written as a `for` loop
  --> $DIR/while_let_on_iterator.rs:450:5
   |
LL |     while let Some(..) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in it`

error: aborting due to 26 previous errors