This question already has an answer here:
What is my desired action whether I see that totally (well, partially) wrong answer was accepted by question owner as correct? E.g. I see the productivity/readability/you-name-it issues with a suggested solution, but the answer somehow has the problem resolved and hence was marked as correct?
What am I supposed to do in such a case?
UPD that is not dup, I examined the relatives thoroughly. I am interested in a case when I’m non-related to discussion at all, but I clearly see, that the answer accepted has leaks. And my question is: “What am I supposed to do?” Leaving intact leads to effort to discredit the resource (what’s indeed not the goal,) disrating an answer makes no sence as well.