error: called `filter(..).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(..)` instead
  --> tests/ui/methods_fixable.rs:9:13
   |
LL |     let _ = v.iter().filter(|&x| *x < 0).next();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `v.iter().find(|&x| *x < 0)`
   |
   = note: `-D clippy::filter-next` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::filter_next)]`

error: called `filter(..).next_back()` on an `DoubleEndedIterator`. This is more succinctly expressed by calling `.rfind(..)` instead
  --> tests/ui/methods_fixable.rs:12:13
   |
LL |     let _ = v.iter().filter(|&x| *x < 0).next_back();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `v.iter().rfind(|&x| *x < 0)`

error: called `filter(..).next_back()` on an `DoubleEndedIterator`. This is more succinctly expressed by calling `.rfind(..)` instead
  --> tests/ui/methods_fixable.rs:18:13
   |
LL |     let _ = vec![1].into_iter().filter(|&x| x < 0).next_back();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec![1].into_iter().rfind(|&x| x < 0)`

error: aborting due to 3 previous errors