Linux bubastis 4.0.5-gentoo #2 SMP Tue Jan 3 15:53:31 EST 2017 x86_64 Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz GenuineIntel GNU/Linux
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K1100M] (rev a1) (prog-if 00 [VGA controller])
Broken: blender-2.79-rc1 and 2.78c
Short description of error
Attempting to bake from selected to active malfunctions for a group of cylinders.
Specifically "tank lower"* and "tank upper" selected_to_active "tank cluster bake 1".
Exact steps for others to reproduce the error
Select the above-mentioned cylinders that are children of "tank cluster A" and make sure that "tank cluster bake 1" is active. Then use the Bake button in the render panel. The necessary material node and UV map are already active.
The resulting image is not suitable for use as a baked texture (for example on "tank cluster bake 1.002")