Ubuntu 16.04 LTS/ GTX 1070 8GB
Short description of error
Quite often when modelling an object with subsurf active, Blender will crash when toggling edit/ object mode. As I am not sure of a reliable way to reproduce on another system, I have attached a few recent crash reports generated by Blender running under RC2.
Exact steps for others to reproduce the error
Not sure how to most reliably reproduce, on my system crashes are fairly random, but seem to come from subsurf modelling and trigger by toggling edit/ object mode.
One such file that has crashed is attached, hopefully it can be of some help.