This line here tells me that an image was rendering when it crashed (on Thread 14): RenderSubregionFromStack_RobustAdaptive
And another line on Thread 0 says that an edit box was edited. So I think this falls under known behaviour which can be avoided (although it would be great if it handled this more safely).
I know there may be other instabilities even when not rendering, so if it crashes again and it's not rendering an image, can you send another crash report for that?
We're looking into the 3D Preview sizing issue in 4.4.67.