In mult-level heirarchies, this causes a stackoverflow exception because the control flow opts to calling the original method instead of the one defined at the super-super level.

For example:

classClass1{publicvirtualvoidMethod(){}}

classClass2(Class1):# This does not implement MethodpassclassClass3(class2):defMethod(self):super().Method()

In this case, calling Class3.Method will cause a stackoverflow exception because it will call back to the virtual Method method instead of the concrete base class implementation.