Comment by matkoniecz
4 years ago
Working and usable program typically contains wrong code of various kinds.
Nontrivial bugfree programs are extreme rarity.
> wrong C is not C
buggy C is still C, if on discovering undefined behavior people treat it as a bug - then it is just C program with some bugs in it.
If on discovering undefined behavior people treat it acceptable people treat it differently "on my compiler it does XYZ, therefore I will knowingly do ABC" then it is becoming something else.
It's not really a bug if it works as the way it was intended by the developer. It just exists in a world outside the law, makes its own laws based on what works, a renegade program. Most people don't read the C standard or care what it says (and it costs money, so it's almost as if reading it is discouraged), so it seems very likely the default human behavior is just to use this UB.