#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ffi::CStr;
fn main() {
    let mut buffer = [0u8; 16];
    unsafe {
        let buf_ptr = buffer.as_mut_ptr();
        buf_ptr.write_bytes(b'A', 8);
    }
    let c_str = CStr::from_bytes_until_nul(&buffer[..]).unwrap();
    assert_eq!(c_str.to_str().unwrap(), "AAAAAAAA");
}