error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:8:47
   |
LL |     let _: Vec<_> = x.iter().map(not_identity).map(|x| return x).collect();
   |                                               ^^^^^^^^^^^^^^^^^^ help: remove the call to `map`
   |
   = note: `-D clippy::map-identity` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::map_identity)]`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:10:57
   |
LL |     let _: Vec<_> = x.iter().map(std::convert::identity).map(|y| y).collect();
   |                                                         ^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:10:29
   |
LL |     let _: Vec<_> = x.iter().map(std::convert::identity).map(|y| y).collect();
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:13:32
   |
LL |     let _: Option<u8> = Some(3).map(|x| x);
   |                                ^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:15:36
   |
LL |       let _: Result<i8, f32> = Ok(-3).map(|x| {
   |  ____________________________________^
LL | |
LL | |         return x;
LL | |     });
   | |______^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:26:36
   |
LL |     let _: Result<u32, u32> = Ok(1).map_err(|a| a);
   |                                    ^^^^^^^^^^^^^^^ help: remove the call to `map_err`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:37:22
   |
LL |     let _ = x.clone().map(|(x, y)| (x, y));
   |                      ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:39:22
   |
LL |       let _ = x.clone().map(|(x, y)| {
   |  ______________________^
LL | |
LL | |         return (x, y);
LL | |     });
   | |______^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:43:22
   |
LL |     let _ = x.clone().map(|(x, y)| return (x, y));
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:47:22
   |
LL |     let _ = y.clone().map(|(x, y, (z, (w,)))| (x, y, (z, (w,))));
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:77:30
   |
LL |     let _ = x.iter().copied().map(|(x, y)| (x, y));
   |                              ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:86:15
   |
LL |     let _ = it.map(|x| x).next();
   |               ^^^^^^^^^^^
   |
help: remove the call to `map`, and make `it` mutable
   |
LL ~     let mut it = [1, 2, 3].into_iter();
LL ~     let _ = it.next();
   |

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:93:23
   |
LL |     let _ = subindex.0.map(|n| n).next();
   |                       ^^^^^^^^^^^
   |
help: remove the call to `map`, and make `subindex` mutable
   |
LL ~     let mut subindex = (index.by_ref().take(3), 42);
LL ~     let _ = subindex.0.next();
   |

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:100:15
   |
LL |     let _ = it.map(|x| x).next();
   |               ^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:106:19
   |
LL |     let _ = { it }.map(|x| x).next();
   |                   ^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:119:30
   |
LL |     let _ = x.iter().copied().map(|[x, y]| [x, y]);
   |                              ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:145:26
   |
LL |     let _ = x.into_iter().map(|Foo { foo, bar }| Foo { foo, bar });
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:149:26
   |
LL |     let _ = x.into_iter().map(|Foo { foo, bar }| foo::Foo { foo, bar });
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:157:26
   |
LL |     let _ = x.into_iter().map(|Foo { foo, bar }| Foo { foo: foo, bar: bar });
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:161:26
   |
LL |     let _ = x.into_iter().map(|Foo { foo, bar }| Foo { bar, foo });
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:171:26
   |
LL |     let _ = x.into_iter().map(|Foo2(foo, bar)| Foo2(foo, bar));
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: unnecessary map of the identity function
  --> tests/ui/map_identity.rs:175:26
   |
LL |     let _ = x.into_iter().map(|Foo2(foo, bar)| foo::Foo2(foo, bar));
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map`

error: aborting due to 22 previous errors