error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:5:5
   |
LL |     s.split(' ').last()
   |     ^^^^^^^^^^^^^------
   |                  |
   |                  help: try: `next_back()`
   |
   = note: `-D clippy::double-ended-iterator-last` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::double_ended_iterator_last)]`

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:22:13
   |
LL |     let _ = DeIterator.last();
   |             ^^^^^^^^^^^------
   |                        |
   |                        help: try: `next_back()`

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:58:13
   |
LL |     let _ = subindex.last();
   |             ^^^^^^^^^^^^^^^
   |
help: try
   |
LL ~     let mut subindex = index.by_ref().take(3);
LL ~     let _ = subindex.next_back();
   |

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:62:13
   |
LL |     let _ = subindex.last();
   |             ^^^^^^^^^------
   |                      |
   |                      help: try: `next_back()`

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:67:13
   |
LL |     let _ = subindex.last();
   |             ^^^^^^^^^------
   |                      |
   |                      help: try: `next_back()`

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:72:13
   |
LL |     let _ = subindex.last();
   |             ^^^^^^^^^------
   |                      |
   |                      help: try: `next_back()`

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:76:13
   |
LL |     let _ = subindex.last();
   |             ^^^^^^^^^^^^^^^
   |
help: try
   |
LL ~     let (mut subindex, _) = (index.by_ref().take(3), 42);
LL ~     let _ = subindex.next_back();
   |

error: called `Iterator::last` on a `DoubleEndedIterator`; this will needlessly iterate the entire iterator
  --> tests/ui/double_ended_iterator_last.rs:89:36
   |
LL |     println!("Last element is {}", v.last().unwrap().0);
   |                                    ^^^^^^^^
   |
   = note: this change will alter drop order which may be undesirable
help: try
   |
LL ~     let mut v = v.into_iter();
LL ~     println!("Last element is {}", v.next_back().unwrap().0);
   |

error: aborting due to 8 previous errors