//@ run-pass
#![allow(dead_code)]
fn sum(x: &[isize]) -> isize {
let mut sum = 0;
for y in x { sum += *y; }
return sum;
}
fn sum_mut(y: &mut [isize]) -> isize {
sum(y)
fn sum_imm(y: &[isize]) -> isize {
pub fn main() {}