Possible Duplicate:
Closing as duplicate removes links that point to other duplicates
Are broken duplicate question links automatically cleaned up?

The first comment on the following question pointed out a previous question and declared that is was similar but not a duplicate.

Are there any implementations of C++ that don't use vtables and vptrs?

I responded to the comment, and shortly thereafter the question was closed with a completely different link as a duplicate.

The first comment disappeared, and I thought it was because the owner had deleted it. Later they claim they had not deleted it, so I suspect a bug in the process that closes a question as a duplicate.

  • My original comment said something along the lines of "not a duplicate, but related anyway: (link)". It looks to me like the auto comment deletion process that ran at the time of the edit deleted anything with "duplicate" in the text. (I can't prove that of course, but I was just about to ask the very same question). So by the time the question got closed I had two comments on it, one manual "not a duplicate" and one automatic "possible duplicate". I found the first question I manually posted a link to whilst trying to find the one I remembered seeing. – Flexo Apr 30 '12 at 21:05
  • @awoodland, I tried to use data.stackexchange.com to find the exact comment text but the question isn't there yet. I presume they use a delayed version of the database. – Mark Ransom Apr 30 '12 at 21:07
  • data.stackexchange is normally a few months behind and even then it only carries publicly visible information at the time of the dump. – Flexo Apr 30 '12 at 21:07
  • @awoodland, months behind? Ouch. I thought maybe they would refresh it from a daily backup. – Mark Ransom Apr 30 '12 at 21:09
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    @MarkRansom: Coincidentally, Popular Demand posted a CW about this just a few minutes ago: Why are my SEDE results inaccurate/obsolete/incorrect/outdated?. According to it, the team tries to update the SEDE data dump monthly, but that information is almost a year and a half old as of this writing. – Dennis Apr 30 '12 at 21:13
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  • Oh, interesting... the automatic comment wasn't created now. So if there's already a comment with a link to the dupe + the word 'duplicate' a second comment is not created (I always thought that only a second automatic comment is not created). So most probably awoodland voted to close first, creating the automatic link and then the manual "not a duplicate" comment – Lorem Ipsum Apr 30 '12 at 21:16
  • @TimStone - my comment explicitly said "not a duplicate" and was never used in the voting as far as I can tell. It played no role in the process other than being deleted. That's awfully confusing if it's "as designed". – Flexo Apr 30 '12 at 21:29
  • @awoodland Yeah, that doesn't sound right... – Tim Stone Apr 30 '12 at 21:30
  • @yoda - the manual "not a duplicate" comment was added by me, first (i.e. before I found the Q I was looking for). The auto duplicate comment was still added when I found it and voted slightly later, it was never edited and nothing interfered with the automatic comment. – Flexo Apr 30 '12 at 21:30
  • @yoda - forgot to add that the two comments linked to completely different questions. – Flexo Apr 30 '12 at 21:38
  • @awoodland Interesting... definitely something seems off. – Lorem Ipsum Apr 30 '12 at 21:43