PyCharm: Call to __init__ of super class is missed

In the following code, the inspector on PyCharm Pro 2018.3.2 shows a warning at line 11 that "Call to __init__ of super class is missed".

#! /usr/bin/python3

from abc import ABC, abstractmethod

class Foo(ABC):
    @abstractmethod
    def __init__(self):
        pass

class Bar(Foo):
    def __init__(self):
        _b = 'b'

Indeed, the initializer of the Foo class is missed when initalizing an instance of the Bar class, on purpose. Why is this a warning? I'm learning about Python classes and inheritance, and this warning has me very confused. What should be the syntax if one wants to override the parent's initializer?