error: this boolean expression contains a logic bug
  --> $DIR/booleans.rs:12:13
   |
12 |     let _ = a && b || a;
   |             ^^^^^^^^^^^ help: it would look like the following: `a`
   |
   = note: `-D logic-bug` implied by `-D warnings`
help: this expression can be optimized out by applying boolean operations to the outer expression
  --> $DIR/booleans.rs:12:18
   |
12 |     let _ = a && b || a;
   |                  ^

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:14:13
   |
14 |     let _ = !true;
   |             ^^^^^ help: try: `false`
   |
   = note: `-D nonminimal-bool` implied by `-D warnings`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:15:13
   |
15 |     let _ = !false;
   |             ^^^^^^ help: try: `true`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:16:13
   |
16 |     let _ = !!a;
   |             ^^^ help: try: `a`

error: this boolean expression contains a logic bug
  --> $DIR/booleans.rs:17:13
   |
17 |     let _ = false && a;
   |             ^^^^^^^^^^ help: it would look like the following: `false`
   |
help: this expression can be optimized out by applying boolean operations to the outer expression
  --> $DIR/booleans.rs:17:22
   |
17 |     let _ = false && a;
   |                      ^

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:18:13
   |
18 |     let _ = false || a;
   |             ^^^^^^^^^^ help: try: `a`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:23:13
   |
23 |     let _ = !(!a && b);
   |             ^^^^^^^^^^ help: try: `!b || a`

error: this boolean expression contains a logic bug
  --> $DIR/booleans.rs:33:13
   |
33 |     let _ = a == b && a != b;
   |             ^^^^^^^^^^^^^^^^ help: it would look like the following: `false`
   |
help: this expression can be optimized out by applying boolean operations to the outer expression
  --> $DIR/booleans.rs:33:13
   |
33 |     let _ = a == b && a != b;
   |             ^^^^^^

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:34:13
   |
34 |     let _ = a == b && c == 5 && a == b;
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
help: try
   |
34 |     let _ = a == b && c == 5;
   |             ^^^^^^^^^^^^^^^^
34 |     let _ = !(c != 5 || a != b);
   |             ^^^^^^^^^^^^^^^^^^^

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:35:13
   |
35 |     let _ = a == b && c == 5 && b == a;
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
help: try
   |
35 |     let _ = a == b && c == 5;
   |             ^^^^^^^^^^^^^^^^
35 |     let _ = !(c != 5 || a != b);
   |             ^^^^^^^^^^^^^^^^^^^

error: this boolean expression contains a logic bug
  --> $DIR/booleans.rs:36:13
   |
36 |     let _ = a < b && a >= b;
   |             ^^^^^^^^^^^^^^^ help: it would look like the following: `false`
   |
help: this expression can be optimized out by applying boolean operations to the outer expression
  --> $DIR/booleans.rs:36:13
   |
36 |     let _ = a < b && a >= b;
   |             ^^^^^

error: this boolean expression contains a logic bug
  --> $DIR/booleans.rs:37:13
   |
37 |     let _ = a > b && a <= b;
   |             ^^^^^^^^^^^^^^^ help: it would look like the following: `false`
   |
help: this expression can be optimized out by applying boolean operations to the outer expression
  --> $DIR/booleans.rs:37:13
   |
37 |     let _ = a > b && a <= b;
   |             ^^^^^

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:39:13
   |
39 |     let _ = a != b || !(a != b || c == d);
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: try
   |
39 |     let _ = c != d || a != b;
   |             ^^^^^^^^^^^^^^^^
39 |     let _ = !(a == b && c == d);
   |             ^^^^^^^^^^^^^^^^^^^

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:47:13
   |
47 |     let _ = !a.is_some();
   |             ^^^^^^^^^^^^ help: try: `a.is_none()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:49:13
   |
49 |     let _ = !a.is_none();
   |             ^^^^^^^^^^^^ help: try: `a.is_some()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:51:13
   |
51 |     let _ = !b.is_err();
   |             ^^^^^^^^^^^ help: try: `b.is_ok()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:53:13
   |
53 |     let _ = !b.is_ok();
   |             ^^^^^^^^^^ help: try: `b.is_err()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:55:13
   |
55 |     let _ = !(a.is_some() && !c);
   |             ^^^^^^^^^^^^^^^^^^^^ help: try: `c || a.is_none()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:56:13
   |
56 |     let _ = !(!c ^ c) || !a.is_some();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `!(!c ^ c) || a.is_none()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:57:13
   |
57 |     let _ = (!c ^ c) || !a.is_some();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(!c ^ c) || a.is_none()`

error: this boolean expression can be simplified
  --> $DIR/booleans.rs:58:13
   |
58 |     let _ = !c ^ c || !a.is_some();
   |             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `!c ^ c || a.is_none()`

error: this boolean expression can be simplified
   --> $DIR/booleans.rs:110:8
    |
110 |     if !res.is_ok() { }
    |        ^^^^^^^^^^^^ help: try: `res.is_err()`

error: this boolean expression can be simplified
   --> $DIR/booleans.rs:111:8
    |
111 |     if !res.is_err() { }
    |        ^^^^^^^^^^^^^ help: try: `res.is_ok()`

error: this boolean expression can be simplified
   --> $DIR/booleans.rs:114:8
    |
114 |     if !res.is_some() { }
    |        ^^^^^^^^^^^^^^ help: try: `res.is_none()`

error: this boolean expression can be simplified
   --> $DIR/booleans.rs:115:8
    |
115 |     if !res.is_none() { }
    |        ^^^^^^^^^^^^^^ help: try: `res.is_some()`

error: aborting due to 25 previous errors