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How a Bugfix Can Take the Wrong Turn

When you debug your code to find a problem in your program, you observe the behavior of the program and make assumptions about the nature of the problem. But the behavior you observe can lead you to the wrong conclusions. Based on the wrong conclusions, you would design a fix that might look good at first glance, but would fix nothing or even make things worse.
In this article, I will give an example of a bug hunt that went down the wrong path. Read on to see how even seemingly simple systems can be surprisingly difficult to get right.