Unfortunately we cannot guarantee that crashes will not occur in the master or promoted branches on github. These are still actively under development and are therefore untested and potentially significantly less stable than released branches. It is not advisable to develop projects on these branches as they are much more prone to crashing and corruption. Additionally, many crashes end up fixed hours or days after experiencing them on these branches.
Having said that, what steps are you taking to reproduce the crash on your end? Did you get a crash log that I can take a look at? Does this occur in a clean, blank project with no additional content or is it limited to one project?