| error: you are implementing `Iterator` on a `Copy` type | |
| --> $DIR/copy_iterator.rs:6:1 | |
| | | |
| LL | / impl Iterator for Countdown { | |
| LL | | type Item = u8; | |
| LL | | | |
| LL | | fn next(&mut self) -> Option<u8> { | |
| ... | | |
| LL | | } | |
| LL | | } | |
| | |_^ | |
| | | |
| = note: consider implementing `IntoIterator` instead | |
| = note: `-D clippy::copy-iterator` implied by `-D warnings` | |
| error: aborting due to previous error | |