To reproduce:
1.Create new project
2.Create a Cube in the hierarchy
3.When cube is selected i the inspector Add Component > New script
4.Drag the cube from hierarchy window to project view to create a prefab
5.Delete the created script
6.Select the prefab

Expected behavior: prefab is selected with no errors
Actual behavior: inspector window gets corrupted, console throws :
ArgumentNullException: Argument cannot be null.
GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced)
ArgumentNullException: Argument cannot be null.
errors non stop.

Reproduced on: 2017.2.0b3
Not reproduced on 5.6.2p4 2017.1.0f3 2017.2.0a1 2017.2.0b1
Regression introduced in: 2017.2.0b2

Workaround:
Drag the prefab from project window to hierarchy, delete missing script components and press apply