There are many questions that contains only some code and a remark like "it doesn't work."
https://stackoverflow.com/questions/5283635/php-and-mysql-update-problem is one example.
Judging by "extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet,"
I'd say that these questions are indeed too localized: nobody is interested in them but their OPs.
But of course for the "enthusiast Q&A site" paradigm, such questions are most welcome as they usually become a source of easy rep for the enthusiasts. This increases the number of ads shown.
Do such questions merit closure as "too localized" In fact, doesn't the "too localized" rule contradict the Q&A site paradigm? If so, maybe it would be reasonable to remove it as a close reason.