Editor crashes on applying joint dependency override when Rigidbody is removed. Refer the attached video.

Steps to reproduce:
1) Create new project
2) Create empty gameObject > Drag and drop in project to make a prefab "A".
3) In hierarchy, select prefab A > Add configurable joint > Apply.
4) select prefab A > Remove configurable joint > Remove Rigidbody.
5) In override window > Apply Rigidbody > Revert Configurable joint.

Actual result: Editor crashes
Expected result: Editor throws a warning, "Rigidbody cannot be removed because of joint dependency".

Occurs on: 2019.3.0a7, 2019.2.0b7, 2019.1.0f2, 2018.3.9f1

Environment: Both Windows and Mac