Figure out why this won't work in rust

rust_fail.rs

use rayon::prelude::*;
use std::rc::Rc;
use std::sync::Arc;
use std::cell::RefCell;
use std::cell::RefCell;

#[macro_use]
extern crate rayon;

struct ResultOfCalc {
}
// This is the magic you need:
trait Marker : Send + Sync {
}
impl Marker for ResultOfCalc {
}

struct Sphere {
    t: Arc<dyn Marker>
}

fn calc_pixel2(data : &&Sphere) -> i32{
    2
}


fn main() -> std::io::Result<()> {

    let r = ResultOfCalc{};
    let h = Sphere{t: Arc::new(r) };
    //let h = (Sphere{});
    let mut data = vec![];

    for i in 0..100 {
        data.push( &h);
    }
    let sum: Vec<i32> = data
        .par_iter()
        .map(calc_pixel2)
        .collect();
    println!("{:?}", sum);
    Ok(())
}