**System Information**
Ubuntu 16.04 64bits Nvidia titan black
**Blender Version**
Broken: master Hash e9d06f0
**Short description of error**
It looks like recent changes to sculpt mode made it unstable.
When a brush with a sculpt plane offset ability use a different sculpt plane than area sculpt plane is used, Blender crashes.
**Exact steps for others to reproduce the error**
Open attached .blend.
Use defined brush on subdivided default cube. -> Crash
{F992292}
{F992293}