Broken: 2.79 official, also tested on latest master.
Short description of error
When rendering with 'Only render active layer' enabled in the renderlayer panel, the image editor switches to a seemingly random renderlayer when rendering is finished, instead of showing the active renderlayer.
Exact steps for others to reproduce the error
- Open Blend file attached and hit F12
- Select another render and render again.
- Repeat #2 a few times and notice that the image editor starts to show you a random renderlayer in the stack, instead of the one you are rendering.