pylint #4593 pylint complains when initializing attribute via property() [open]

Suppose I have a new-style class which uses a property() call to define a setter:

class C(object):
    def __init__(self):
        self.a = 5
    def set_a(self, val):
        self._a = val
    def get_a(self):
        return self._a
    a = property(get_a, set_a)

pylint complains that self._a is initialized outside of __init__. It would be nice if it could figure out that C.set_a is a valid place to initialize self._a. (I realize this may well not be a trivial request.)