1 error[E0599]: `usize` is not an iterator
2 --> $DIR/issue-90315.rs:3:26
4 LL | for _i in 0..arr.len().rev() {
5 | ^^^ `usize` is not an iterator
7 = note: the following trait bounds were not satisfied:
9 which is required by `&mut usize: Iterator`
11 error: aborting due to previous error
13 For more information about this error, try `rustc --explain E0599`.