If it turns out that there's actually nothing to answer — e.g. if the question asks "Why does this code not do X?" and it turns out that the code does do X, but the OP had a typo in a different part of their code — then I would vote to close the question as "too localized".
The description of that closing reason says (emphasis mine):
"This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ."
Failing to do something because you had a completely unrelated problem somewhere else is, IMO, definitely an "extraordinarily narrow situation" whose solution is "unlikely to help any future visitors". As I wrote in another answer to a similar question recently:
Nobody's ever going to search for, say, "How to parse XML in Perl?", find an answer that says "Just fix the typo in the file name," and think "Oh, wow, that was my problem too!"
If you don't have enough rep to vote to close, you can still flag the question; the "too localized" option is hidden behind "it doesn't belong here, or it is a duplicate" when flagging, but it's there. Besides ♦ mods, 10k+ users can also see questions flagged for those reasons in the flagged posts review tool, and can vote to actually close them.