Size of empty class with diamond problem

Question

As far as k know, empty class must have size as 1 so that object do not refer to same memory location... Why empty class size is 2 in case of diamond problem...?

refer below code to verify size of class as 2:
https://code.sololearn.com/cGtKbwpeAw7L/?ref=app

Answer 1

This explains why : https://stackoverflow.com/questions/44624706/why-the-size-of-empty-class-that-is-derived-from-two-empty-classes-is-2

Answer 2

thanks Kinshuk Vasisht