Hashing fails for objects of local classes

[svetlin-mladenov]

def test_bound_method():
    class Test:
        def __init__(self):
            self.n = 0
        def inc(self):
            self.n += 1
        def get(self):
            return self.n
    obj = Test()
    fun = fcache(obj.get)
    assert fun() == 0

This code will fail despite the fact that Test is not being persisted on disk. Test is used just to compute the Hash of Test().get