Crashing for me as well.  It is Lux that is crashing.  I played around with the render settings and put them to No GPU acceleration, as in just using the CPU option for the rendering.  That seems to solved it for me.  My graphics card is an NVidia gforce 550 Ti, so not too many cuda cores on that one, and I'm not sure about openCl support for that card.  I'm using the openCl version of Lux, 64bit.