Array index out of range after build

Questions & Answers
1

Hello, In editor works good but after build there is error IndexOutOfRangeException: Index was outside the bounds of the array.

                int rand = Random.Range(0, (cars.Length));
                vehicle = Instantiate(cars[rand]);

I tried with cars.length-1 too but not working. There is only one element in cars array but will be more but at this time I want to make it works with one element in the array.
Why in editor it works but not after build?

2

Please can anyone help me with arrays which resets after build with no reason?