That sort of code is a bit tricky though. Since the fault code paths (hopefully) are very rarely executed, the error messages are easy to overlook, and tend to

That sort of code is a bit tricky though. Since the fault code paths (hopefully) are very rarely executed, the error messages are easy to overlook, and tend to rapidly become stale. This is to an extent always a problem with error messages, but it's an ever bigger problem when you have half a dozen error messages depending on various parameters, since they create more and even more rare code paths for staleness to hide in.