I agree, this is the type of bug where the test would not have been written until after the bug was found. When the bug gets found, the test will be written, th

I agree, this is the type of bug where the test would not have been written until after the bug was found. When the bug gets found, the test will be written, the code will be updated and no one will touch it unless another bug gets found; rinse and repeat. Just like it is hard to proof read your own papers, it is hard to write complete tests for your own code.