Nothing unique on your PC. I reproduced. There is a bug in how the mask is handling memory. It happens on OpenCL and CPU path. I did not try it on another module (not D&S).
Now we need to wait for someone to look into the fix. Meanwhile, keep your settings to large, keep AMD off, avoid having browser with a lot of tabs open if you are editing in dt.
@g-man@hannoschwalm I have just installed the latest weekly build for Windows and can confirm that the problem seems fixed as my computer is not crashing when moving the thresholds slider. Thanks for fixing this.