Static and dynamic analysis help when unit tests fail

This article discusses the importance of static and dynamic code analysis in conjunction with unit tests, highlighting how these techniques can provide valuable insights when tests fail.

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No one disputes the value of static or dynamic code analysis. However, some developers see that value as rather abstract and stop at writing unit tests. I recently came across an example from the C world that nicely illustrates how unit tests can sometimes fail to catch even the most common types of errors.

I've already discussed the bug I'm about to show you in the article " A beautiful error in the implementation of the string concatenation function ." I'll briefly recap it, and then we'll look at it from the perspective of early detection.

The LFortran project had the following function for concatenating two strings into a new buffer:

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