**System Information**
Windows 7 x64, GPU GT 520m,
**Blender Version**
Broken: 2.78b
Worked: (2.78a)
**Short description of error**
GPUShader: compile error
**Exact steps for others to reproduce the error**
making a simple plane. added a glass shader to the mix shader node. the error apears when we connect a light path in shadow ray to the Fac of mix shader. "GPUShader: compile error:
0(3676) : error C1104: too many parameters in function call"