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// run-pass
#![allow(unused_must_use)]
use std::slice::Iter;
use std::io::{Error, ErrorKind, Result};
use std::vec::*;
fn foo(it: &mut Iter<u8>) -> Result<u8> {
Ok(*it.next().unwrap())
}
fn bar() -> Result<u8> {
let data: Vec<u8> = Vec::new();
if true {
return Err(Error::new(ErrorKind::NotFound, "msg"));
}
let mut it = data.iter();
foo(&mut it)
}
fn main() {
bar();
}
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