1. Open attached project
2. Open scene inter-collision.unity
3. Select one of the Sphere gameobjects
4. In the Inspector, right click on the Cloth component and select Copy Component
5. Select the Plane gameobject
6. Right click on the Cloth component and select Paste Component Values
- Note the errors in the console
- The Scene View also breaks in addition to this

- Reproduced with 2017.3.0f1 (b84f5794ed91)