error: the loop variable `i` is only used to index `ns`. --> $DIR/needless_range_loop.rs:8:14 | 8 | for i in 3..10 { | ^^^^^ | = note: `-D needless-range-loop` implied by `-D warnings` help: consider using an iterator | 8 | for in ns.iter().take(10).skip(3) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `ms`. --> $DIR/needless_range_loop.rs:29:14 | 29 | for i in 0..ms.len() { | ^^^^^^^^^^^ help: consider using an iterator | 29 | for in &mut ms { | ^^^^^^ ^^^^^^^ error: the loop variable `i` is only used to index `ms`. --> $DIR/needless_range_loop.rs:35:14 | 35 | for i in 0..ms.len() { | ^^^^^^^^^^^ help: consider using an iterator | 35 | for in &mut ms { | ^^^^^^ ^^^^^^^ error: aborting due to 3 previous errors