I've proposed the following new custom close reason for here on Meta.Programmers:

The problem described here can no longer be reproduced. Changes to the system or to the circumstances affecting the asker have rendered it obsolete. If you encounter a similar problem, please post a new question.

This is a direct copy of the one on Meta.StackOverflow (sorry Meta.StackExchange).

If we think that it's a good idea then it can be activated by another moderator.

  • Do it. Do it. Do it. – user40980 Apr 17 '14 at 2:04
  • For Meta, yes, it makes perfect sense. – Robert Harvey Apr 17 '14 at 2:15
  • voted to close this very question using new reason. Feels pretty meta :) – gnat Apr 17 '14 at 11:49