error: unnecessary map of the identity function --> $DIR/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` error: unnecessary map of the identity function --> $DIR/map_identity.rs:9:57 | 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 --> $DIR/map_identity.rs:9:29 | 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 --> $DIR/map_identity.rs:10:32 | LL | let _: Option<u8> = Some(3).map(|x| x); | ^^^^^^^^^^^ help: remove the call to `map` error: unnecessary map of the identity function --> $DIR/map_identity.rs:11:36 | LL | let _: Result<i8, f32> = Ok(-3).map(|x| { | ____________________________________^ LL | | return x; LL | | }); | |______^ help: remove the call to `map` error: aborting due to 5 previous errors