Using DestroyImmediate on one GameObject makes a reference to another a null

Questions & Answers
1

I have a rope that consists of links, one attached to another. Each link (except for the first one) has a HingeJoint2D component, in which the connectedRigidbody field is set to the rigidbody of the previous link. I paint the rope with a custom brush that sets all connections automatically, but I’m trying to implement Erase method so that when I click on one link, the whole rope gets erased. I’m trying to do it traversing the rope by accessing connectedRigidbody and deleting links one by one:

public override void Erase(GridLayout gridLayout, GameObject brushTarget, Vector3Int position)
{
        GameObject toErase = GetGameobjectInCell(gridLayout, position, brushTarget.transform);

        while (toErase != null)
        {
            GameObject nextToErase = toErase.GetComponent<HingeJoint2D>()?.attachedRigidbody.gameObject;
            Debug.Log(nextToErase);
            DestroyImmediate(toErase);
            Debug.Log(nextToErase);
            toErase = nextToErase;
        }
}

this is what the Debugger says:
177902-screenshot-1.png
And I wonder why after using DestroyImmediate on toErase, nextToErase becomes null

2

Well, it was actually very easy. I confused connectedBody with attachedRigidbody, the second one apparently refers to the same object.