Changing the Root of a reparented Blueprint crashes the editor

Changing the Root of a reparented Blueprint crashes the editor with no Crash Reporter dialogue. Log from 4.7.5 attached.

Reproduced in 4.7.5 binary and Main (//depot/UE4/Promotable-CL-2507843)

1. Open any project
2. Create a new Character Blueprint
3. Add a Static Mesh component
4. Add a Scene component
5. Reparent the Blueprint to Actor
6. Make the Scene component the Root

Result:
Immediate crash with no Crash Report