error: this loop could be written as a `while let` loop
  --> $DIR/while_loop.rs:9:5
   |
9  | /     loop {
10 | |         if let Some(_x) = y {
11 | |             let _v = 1;
12 | |         } else {
13 | |             break
14 | |         }
15 | |     }
   | |_____^ help: try: `while let Some(_x) = y { .. }`
   |
   = note: `-D while-let-loop` implied by `-D warnings`

error: this loop could be written as a `while let` loop
  --> $DIR/while_loop.rs:22:5
   |
22 | /     loop {
23 | |         match y {
24 | |             Some(_x) => true,
25 | |             None => break
26 | |         };
27 | |     }
   | |_____^ help: try: `while let Some(_x) = y { .. }`

error: this loop could be written as a `while let` loop
  --> $DIR/while_loop.rs:28:5
   |
28 | /     loop {
29 | |         let x = match y {
30 | |             Some(x) => x,
31 | |             None => break
...  |
34 | |         let _str = "foo";
35 | |     }
   | |_____^ help: try: `while let Some(x) = y { .. }`

error: this loop could be written as a `while let` loop
  --> $DIR/while_loop.rs:36:5
   |
36 | /     loop {
37 | |         let x = match y {
38 | |             Some(x) => x,
39 | |             None => break,
...  |
42 | |         { let _b = "foobar"; }
43 | |     }
   | |_____^ help: try: `while let Some(x) = y { .. }`

error: this loop could be written as a `while let` loop
  --> $DIR/while_loop.rs:58:5
   |
58 | /     loop {
59 | |         let (e, l) = match "".split_whitespace().next() {
60 | |             Some(word) => (word.is_empty(), word.len()),
61 | |             None => break
...  |
64 | |         let _ = (e, l);
65 | |     }
   | |_____^ help: try: `while let Some(word) = "".split_whitespace().next() { .. }`

error: this loop could be written as a `for` loop
  --> $DIR/while_loop.rs:68:33
   |
68 |     while let Option::Some(x) = iter.next() {
   |                                 ^^^^^^^^^^^ help: try: `for x in iter { .. }`
   |
   = note: `-D while-let-on-iterator` implied by `-D warnings`

error: this loop could be written as a `for` loop
  --> $DIR/while_loop.rs:73:25
   |
73 |     while let Some(x) = iter.next() {
   |                         ^^^^^^^^^^^ help: try: `for x in iter { .. }`

error: this loop could be written as a `for` loop
  --> $DIR/while_loop.rs:78:25
   |
78 |     while let Some(_) = iter.next() {}
   |                         ^^^^^^^^^^^ help: try: `for _ in iter { .. }`

error: this loop could be written as a `while let` loop
   --> $DIR/while_loop.rs:118:5
    |
118 | /     loop {
119 | |         let _ = match iter.next() {
120 | |             Some(ele) => ele,
121 | |             None => break
122 | |         };
123 | |         loop {}
124 | |     }
    | |_____^ help: try: `while let Some(ele) = iter.next() { .. }`

error: empty `loop {}` detected. You may want to either use `panic!()` or add `std::thread::sleep(..);` to the loop body.
   --> $DIR/while_loop.rs:123:9
    |
123 |         loop {}
    |         ^^^^^^^
    |
    = note: `-D empty-loop` implied by `-D warnings`

error: this loop could be written as a `for` loop
   --> $DIR/while_loop.rs:183:29
    |
183 |         while let Some(v) = y.next() { // use a for loop here
    |                             ^^^^^^^^ help: try: `for v in y { .. }`

error: aborting due to 11 previous errors