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Edge case, low priority, but odd enough that it caught my eye so I'm documenting it while it's fresh in my mind. Most of this I have not been able to test or reproduce, so I'll just post some examples and guess at what's going on... Exceptions noted.

Example #1: Will an executable moved to another directory still work?

  • 2009-08-31 18:35:46Z: asked
  • 2009-08-31 18:38:18Z: first answer posted
  • 2009-08-31 18:40:23Z: closed and migrated; first answer deleted
  • 2009-08-31 18:40:54Z: second answer posted
  • 2009-08-31 18:41:19Z: third answer posted

Second and third answers remain visible and fully-unlocked. Primary anomaly: Answers accepted to migrated question post-migration.

Example #2: Creating a group in trying not to use Sudo nor 777

  • 2009-08-31 17:02:54Z: asked
  • 2009-08-31 17:19:05Z: first answer posted
  • 2009-08-31 17:19:34Z: closed and migrated; first answer deleted
  • 2009-08-31 17:42:42Z: Second answer posted

The second answer remains visible and fully-unlocked. Primary anomaly: answer accepted to migrated question over twenty minutes after migration.

Example #3: Listing everything else than *{.tex, .aux} by ls

  • 2009-08-30 19:09:51Z: asked
  • 2009-08-30 19:17:43Z: first answer posted
  • 2009-08-30 19:17:45Z: second answer posted
  • 2009-08-30 19:18:01Z: closed and migrated; first and second answers deleted
  • 2009-08-30 19:20:10Z: first answer undeleted by author
  • 2009-08-30 19:19:20Z: third answer posted

Both the first and second answers remain visible and fully-unlocked. Primary anomaly: author able to undelete second answer.


If I understand correctly, there's a grace period for posting to closed questions, intended to avoid losing the work of authors who are busy composing their answers when a question is closed. That explains #1, but not #2... unless the grace period has been extended to > 23 minutes. #3 i can verify - it's possible for authors to undelete their own answers on migrated questions.


Normally, there's a good reason for the grace period (if that's what's really going on here): it avoids wasting authors' time when closing is controversial and the question ends up being re-opened anyway. In the case of migration however, "re-opening" is a much less likely (requires moderator intervention) - it would make more sense to just redirect them to the migrated question and ask that they respond there.

I don't think allowing authors to undelete answers on migrated questions really makes much sense; otherwise, why delete them in the first place? They should be locked.

share|improve this question
Looking into this - thanks for the research! –  Jarrod Dixon Sep 4 '09 at 6:37
@Jarrod: how's it coming over there? Here's another one: stackoverflow.com/questions/3136767/… –  Ether Jun 29 '10 at 3:46
@Jarrod, another example: Two new answers posted after migration (and hence not migrated) and its timeline. –  Arjan Jan 23 '11 at 22:51
@JarrodDixon any update? Been [status-review] for 2 years –  Jim Sep 4 '12 at 19:55
See also judaism.stackexchange.com/a/29347, posted after the Q was closed (no migration). Ping also @JarrodDixon. –  msh210 Jun 13 '13 at 17:16

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