error: this call to `map()` won't have an effect on the call to `count()`
--> $DIR/suspicious_map.rs:4:13
|
LL | let _ = (0..3).map(|x| x + 2).count();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: `-D clippy::suspicious-map` implied by `-D warnings`
= help: make sure you did not confuse `map` with `filter`
error: aborting due to previous error
