Cycles, Baking high to low with cage: problem


I have the simplest cube_hi, cube_lo and cage setup. Cycles enabled and trying to bake the normals. When cage is disabled the normal texture is baked, but immediatelly I enable the cage (a bit bigger than the cube_lo) there won’t be baking done (tried scaling the geometry and scaling the object). I am using 2.78 testing2 version. Is this Blender problem or is this just me?

Blend file here does have the setup.

Thanks for help,


WhyCyclesCage.blend (500 KB)