perhaps there is some commonality in your setups or some command line switch is being used by the both of you that is causing the crash. I have tried to reproduce the crash on my machine and I can't do it.
If the cause of the crash is not known, perhaps we can help the developers if we can figure out what is causing it.
I have created a fresh mame.ini and cleaned all directories using the X64 version I have attached and I can't make it crash here.