dMenuItem.py -> self.SetBitmap(self.Icon) message

[jfabiani]

Something similar was reported years ago while working with python 2 and wxPython 2.8 and you fixed it.
wx._core.wxAssertionError: C++ assertion "Assert failure" failed at /u/Downloads/wxPython-4.0.4/ext/wxWidgets/src/gtk/menu.cpp(729) in SetBitmap(): only normal menu items can have bitmaps

I doubt this has much to do with the Seg Fault (I even commented it out to test) but I thought I'd report it anyway.