Parsing Response causes a panic

[frewsxcv]

code:

#![feature(plugin)]
#![plugin(afl_coverage_plugin)]

extern crate afl_coverage;

extern crate httparse;

use std::io::{self, Read};


fn main() {
    let mut input = String::new();
    let result = io::stdin().read_to_string(&mut input);
    if result.is_ok() {
/*
        {
            let mut headers = [httparse::EMPTY_HEADER; 16];
            let mut req = httparse::Request::new(&mut headers);
            req.parse(input.as_bytes());
        }
*/

        {
            let mut headers = [httparse::EMPTY_HEADER; 16];
            let mut res = httparse::Response::new(&mut headers);
            res.parse(input.as_bytes());
        }
    }

input: (this is encoded in base64, decode it before feeding it in)

SFRUUC8xLjESMjAw

error:

root@vultr:~/afl-staging-area2# cargo run < outputs/crashes/id:000002,sig:04,src:000001,op:havoc,rep:2
     Running `target/debug/afl-staging-area2`
thread '<main>' panicked at 'arithmetic operation overflowed', /root/httparse/src/lib.rs:34
An unknown error occurred

To learn more, run the command again with --verbose.

This bug was found using https://github.com/kmcallister/afl.rs 👍