Question Crash

[porkshopp]

When I assign this script to a gameobject Unity crashes. Does anyone know why?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MoveGene : MonoBehaviour
{
public int fed = 0;
public int dayTime = 3;
public int FoodCap = 1;
public Rigidbody rb;
public GameObject food;
public GameObject Organism;
public float scope = 1f;
public float speed = 1f;
public bool isHome = false;
public Vector3 Home;
public float hRange = 0.5f;
private float startTime;
public float t;


// Start is called before the first frame update

void Start()
{


startTime = Time.time;
        Home = rb.position;

    }

    private void OnTriggerEnter(Collider other)
{
if(other.CompareTag("Consumable"))
{
fed++;
}
    }


    // Update is called once per frame
void Update()
{
while ( Organism != null)
        {

        }

         t = (Time.time - startTime);
if (food == null)
{
           
            float n = (rb.transform.position.z - Home.z) / (rb.transform.position.x - Home.x);
            if (rb.transform.position.x > Home.x && isHome == false) rb.AddForce(-speed * Time.deltaTime, 0, -n * speed * Time.deltaTime);
            else if (rb.transform.position.x < Home.x && isHome == false) rb.AddForce(speed * Time.deltaTime, 0, n * speed * Time.deltaTime);
          


            if ((Mathf.Abs(rb.transform.position.z - Home.z) < hRange && Mathf.Abs(rb.transform.position.x - Home.x) < hRange))
{
rb.velocity = Vector3.zero;
isHome = true;
}




}
if (food != null)
{
while (Mathf.Abs(rb.transform.position.x - food.transform.position.x) > scope && Mathf.Abs(rb.transform.position.z - food.transform.position.z) > scope)
{
int Vel = Random.Range(-100, 100);
int Vel2 = Random.Range(-100, 100);
rb.AddForce(speed*Vel*Time.deltaTime, 0, speed*Vel2*Time.deltaTime);

}

if (Mathf.Abs(rb.transform.position.x - food.transform.position.x) < scope && Mathf.Abs(rb.transform.position.z - food.transform.position.z) < scope)
            {

float k = (rb.transform.position.z - food.transform.position.z) / (rb.transform.position.x - food.transform.position.x);
if (rb.transform.position.x > food.transform.position.x) rb.AddForce(-speed*Time.deltaTime, 0, -k * speed*Time.deltaTime);
                else rb.AddForce(speed*Time.deltaTime, 0, k * speed*Time.deltaTime);

               

            }

}
if (t > dayTime)
{

if (fed > 0 && isHome == true)
{


}
else Destroy(gameObject);
}

}
}

 

[jmcilhinney]

Perhaps you could provide a more detailed explanation of what actually happens. I don't use Unity but I may be able to help if I have all the relevant information. I may be able to identify the issue with the code if I have some idea what I'm looking for but there's a fair bit of code there and it is quite poorly formatted, so I'm not prepared to just start trawling through it in the hope that something jumps out.