Cannot Deserialize JSON array with empty items to tuple struct

[jans2002]

The following is test code;

use serde::{Serialize,Deserialize};
#[derive(Debug, Deserialize)]
struct Reading(Option<i32>, Option<i32>, Option<i32>, i32,Option<f32>, i32, f32,f64,Option<i32>);

fn main() {
    let data  = "[,,,30,,40,5.5,89.9,]";
    let res: Reading = serde_json::from_str(data).unwrap();
    println!("{:?}", res);
}

It will show

Error("expected value", line: 1, column: 2)

But it should show :

Reading(None, None, None, 30, None, 40, 5.5, 89.9, None)