Windows 10 x64 home on Nvidia GTX 1070 with latest WHQL drivers.
Short description of error
"Material" viewport mode will crash if any if material group nodes contains more than 64 inputs/outputs. "Render" viewport mode will work fine though...
Exact steps for others to reproduce the error
- Open attached file.
- Switch viewport mode to "Material".
- [[ http://www.techkind.org/Blender/[Bugreports]_64_outputs.png | In next 1-10 seconds Blender will crash ]].
P.S. It may sounds funny & not practical limitation but not for me - in my "Real Materials" series those tricky collapseable sections with options sliders allows to keep things simple and use more than 64 material parameters...