error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:15:5
   |
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`
   = help: to override `-D warnings` add `#[allow(clippy::while_let_on_iterator)]`

error: this loop could be written as a `for` loop
  --> tests/ui/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
  --> tests/ui/while_let_on_iterator.rs:27:5
   |
LL |     while let Some(_) = iter.next() {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in iter`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:104:9
   |
LL |         while let Some([..]) = it.next() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for [..] in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:112:9
   |
LL |         while let Some([_x]) = it.next() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for [_x] in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:126:9
   |
LL |         while let Some(x @ [_]) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x @ [_] in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:147:9
   |
LL |         while let Some(_) = y.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in y`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:205:9
   |
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
  --> tests/ui/while_let_on_iterator.rs:217:5
   |
LL |     while let Some(n) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for n in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:220:9
   |
LL |         while let Some(m) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for m in it`

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

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:240:9
   |
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
  --> tests/ui/while_let_on_iterator.rs:258:9
   |
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
  --> tests/ui/while_let_on_iterator.rs:274:13
   |
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
  --> tests/ui/while_let_on_iterator.rs:307:13
   |
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
  --> tests/ui/while_let_on_iterator.rs:337:5
   |
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
  --> tests/ui/while_let_on_iterator.rs:350:9
   |
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
  --> tests/ui/while_let_on_iterator.rs:365:5
   |
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
  --> tests/ui/while_let_on_iterator.rs:377:5
   |
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
  --> tests/ui/while_let_on_iterator.rs:413:5
   |
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
  --> tests/ui/while_let_on_iterator.rs:421:5
   |
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
  --> tests/ui/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
  --> tests/ui/while_let_on_iterator.rs:441:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:452:9
   |
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
  --> tests/ui/while_let_on_iterator.rs:463:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:476:9
   |
LL |         while let Some(x) = it.next() {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:487:5
   |
LL |     'label: while let Some(n) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `'label: for n in it`

error: this loop could be written as a `for` loop
  --> tests/ui/while_let_on_iterator.rs:497:5
   |
LL |     while let Some(..) = it.next() {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in it`

error: aborting due to 28 previous errors