Why are memory errors hard to debug?
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The first thing to understand about memory errors is why they're different from other bugs. I claim the main reason they are harder to debug is that they are fragile. By fragile, I mean the bug will often only show up under certain conditions, and that attempts to isolate the bug by changing the program or its input often mask its effects. Since the programmer is then forced to find the needle in the haystack, and cannot use techniques to cut down on the size of the haystack, locating the cause of the problem is very difficult.
Consequently, the first priority when tracking down suspected memory errors is to make the bug more robust. There is a bug in your code, but you need to do something so that the bug's effects cannot be masked by other actions of the program.
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