Steps to reproduce:

1. Create new project
2. Add "Canvas", add child "Image" to it and add "Canvas" component to image and check "Override sorting"
3. Add child "Image" to "Canvas > Image". Assign "Canvas" component to it and check "Override sorting". (Hierarchy can be observed in attached picture)
4. Remove "Canvas" component and then remove "Image (Script)" component from "Canvas > Image > Image".
5. Start dragging "Canvas > Image > Image" in scene view. Unity should crash in few seconds.

Note: If scene with completed hierarchy is saved and reopened, crash won't be reproducible.