#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::fmt::Write;
fn main() -> Result<(), impl core::fmt::Debug> {
    let data = [1u8, 2, 3, 4, 5];
    let mut ptr: *const u8 = data.as_ptr();
    let step = 2;
    let end_rounded_up = ptr.wrapping_add(6);
    let mut out = String::new();
    while ptr != end_rounded_up {
        unsafe {
            write!(& mut out, "{}, ", * ptr)?;
        }
        ptr = ptr.wrapping_add(step);
    }
    assert_eq!(out, "1, 3, 5, ");
    std::fmt::Result::Ok(())
}