**System Information**
Windows 10
Intel HD 4600
**Blender Version**
Broken: 2.78
Worked: (optional)
**Short description of error**
There are several corner cases while using AO that should be disabled:
# Lamps
# Cameras
# Empties
# Objects with Wireframe as the maximum draw type
**Exact steps for others to reproduce the error**
# Turn on AO
# Add any off the above objects