Editor freezes after applying an original prefab as a child through override window. Refer attached video.

Steps to reproduce:
1) Create a new project.
2) Create an empty gameObject A.
3) Create a prefab by dragging in the project browser.
4) Drag this prefab again in the project browser > In dialogue box select > Create Original. Call this prefab B
5) Add B as a child of A
6) Select A > In Overrides window > Apply all.

Actual result: Editor freezes.
Expected result: Cyclic nesting exception should be thrown.

Occurring on: 2019.2.0a14, 2019.2.0a10
Working fine on: 2019.3.0a1, 2019.2.0a9, 2019.1.0f1

Environment: Both Mac and Windows

Note: When adding the child prefab through hierarchy, argument exception is thrown in console.