#[inline(never)]
fn dummy(fp_u16: &mut [u16]) {
    dbg!(fp_u16);
}

pub fn main() {
    let final_packet :Vec<u8> = vec![0, 0, 0, 0];
    let mut fp_u16 = vec![((final_packet[0] as u16) << 8) | final_packet[1] as u16];
    dummy(&mut fp_u16);
}