Last modified: 2013-02-22 05:45:05 UTC
To reproduce: 1/ Create a page with one revision 2/ Delete the page using normal delete 3/ Apply RevDelete to hide the content of the deleted revision 4/ Try to undelete the page using normal delete. The same can happen on pages with many revisions if selective undelete is used, when RevDelete happens to be applied to the latest revision to be selectively undeleted. (Eg in cases of vandalism or page move fixing) Example, try undeleting the following: http://en.wikipedia.org/w/index.php?title=Special:Undelete&target=User%3AFT2%2Ftest5 Error is correct but inelegant and inaccurate, suggesting something has not been caught or some text parameter is missing.
I can't reproduce. When doing your steps (on trunk) i get: Undelete failed; someone else may have undeleted the page first. Undeletion will not be performed if it will result in the top page or file revision being partially deleted. In such cases, you must uncheck or unhide the newest deleted revision. Can you confirm if the error is still present?
Looks like this edge case has been caught since 2010 by some kind of extra test for the top page or file being deleted. It now acts as I'd expect, error if the text is hidden, allows it if the edit summary is hidden. The error message has a slight bug, the presence of <p></p>: "Undelete failed; someone else may have undeleted the page first." "<p></p>" The error message should also by default link to the delete log for the page - it's telling the user there is probably an issue related to delete/undelete. At present the error doesn't give any useful links the user can click.
This appears to be fixed except that the message isn't quite as useful as it could be, but there is no obvious bug or uncaught error. The error message could use a link to the appropriate delete log entry. However the message has been updated since FT2's comment, there is no longer an empty p tag. Marking the bug appropriately, as it is not a revision deletion error.
Unassigning default assignments. http://article.gmane.org/gmane.science.linguistics.wikipedia.technical/54734
Still an issue?
https://test.wikipedia.org/wiki/Special:Undelete/Bug23594 : Undelete failed: Undeletion will not be performed if it will result in the top page or file revision being partially deleted. In such cases, you must uncheck or unhide the newest deleted revision. ---- I call this fixed; adding log excerpts is a separate enhancement request.