I'm not sure if this is a bug. But it looks like it, because before Blender 2.78 this crash didn't occure.
OS's: Arch linux, windows 10
GPU's: nvidia gtx950m and several others.
Broken: 2.78 4bb1e22
Worked: 2.77a abf6f08 (is from arch linux repo i think)
The code is part of the blenchmark add-on. Several users reported that it is not working since Blender version 2.78
Short description of error
calling bpy.ops.wm.open_mainfile from class which is invoked from pop-up button results in crash.
Exact steps for others to reproduce the error
- install and enable attached addon (samplescriptje)
- click Render > sample
- click ok in popup