This question on Stack Overflow required 4 votes to close, despite the requirement on Stack Overflow being only 3 votes to close a question. A similar bug was fixed and marked in 2010 (though the comments note its reappearance).

I suspect this was caused by a server error partway through the request for the final close vote. When I cast the third close vote, I received an error (unfortunately, I didn't take note of it at the time). It doesn't appear to be an issue of the last two close votes coming in simultaneously: some time elapsed between the third and fourth votes, allowing me to click around and refresh a few times before the last vote was cast.

Here is what the question looked like after I cast the third close vote and refreshed the page:

screenshot of an open Stack Overflow question with 3 close votes

And here is what it looked like after someone else cast the fourth, closing it:

screenshot of a closed Stack Overflow question with 4 close votes

  • 7
    This is, I think, the same trick Shog once used to close a question as a duplicate of multiple targets, before the feature to edit the target list was implemented. He'd cast a binding vote for one target, then trigger a server error while that was being processed, then vote for the other. Commented Jan 13, 2021 at 3:57
  • There exists the possibility that one vote was retracted, another cast, then it closed on three valid votes without the deletion of the retracted one firing in time.
    – Rob
    Commented Jan 13, 2021 at 17:46


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