for (i, &x) in new_loan_indices.iter().enumerate() {
let old_loan = &self.all_loans[x];
- for &y in new_loan_indices.slice_from(i+1).iter() {
+ for &y in new_loan_indices[(i+1) ..].iter() {
let new_loan = &self.all_loans[y];
self.report_error_if_loans_conflict(old_loan, new_loan);
}