extern crate libc;
use std::ffi::CStr;
use libc::c_char;

unsafe fn test(str_ptr: *const c_char) {
    let var: Vec<u8> =CStr::from_ptr(str_ptr)
        .to_bytes()
        .iter()
        .map(|i| *i)
        //.clone()
        .collect();

}

fn main() {
    unsafe {
       test(std::ptr::null());
    }
}