'Check that the insertion logic does not create an infinite lookup
chain with deleted entries (insertion should happen at the first
deleted entry, not at the free entry at the end of the chain).
See issue #1913.'

def test_add_discard(self):

    pyfunc = add_discard_usecase
    check = self.unordered_checker(pyfunc)
    check((1,), 5, 5)
