2.80 (sub 46), 1df6a98b176f, 2019-03-05 00:32
Nvidia GT 640
Xeon 5450 3Ghz
How to reproduce:
Enable Rendered mode in top right area,
Create and add some nodes between color Ramp and Linear light (invert, mathnode 4 example). Cut them, add again…
Crashes are not always, but very often.
It happens often if I work with such NPR-shaders and render turned on.
IMO fast changes inside shader cause such crashes.