fn weird_function() -> (u8, Vec<u8>) {
    let (mut a, mut b) = (0, Vec::new());
    for i in 0..256 {
        b = b"string".to_vec();
        a = i;
    }
    (a, b) // Change this to (a as u8, b) and it works
}

fn main() {
    println!(
        "weird_function: {}",
        String::from_utf8(weird_function().1).unwrap()
    );
}