This concerns this question I (and then others) voted to close. It contains some bugs, which were found in this review by mdfst13. I wasn't sure if closing was a good idea and the current outcome says it was not:
... After the question has been edited to contain working code ...
IMHO the question should not be edited, as it'd invalidate the already given answer, which is good. At the same time, it makes no sense to post additional answers and the OP should start a new question after fixing the bugs. The question also should not be deleted as the answerer deserves their reputation.
But we have no "not deleted and not editable and not answerable" status, do we?
What's the proper cause of action?