Comment by copsarebastards

I understand the problem, I'm saying that it's not GCC's problem. If you don't want undefined behavior, don't put undefined behavior in your code. The code you wrote isn't clear or reasonable, because it relies undefined behavior. It's a valid criticism that this code does appear to be straightforward when it isn't, but that's not a criticism of GCC, it's a criticism of ANSI C. If you don't like it, use a better language. C was designed 4 decades ago; and they can't possibly have forseen every problem that we've discovered in that time.