Eli Zaretskii  writes:

>> Date: Fri, 08 Aug 2025 02:52:28 +0530
>> From:  James Thomas via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>> 
>> +If N is negative, reinsert the earliest available kill.
>
> Thanks, but that is not what I see when I try "C-u - 1 C-y".  It
> inserts the 2nd earliest kill, i.e., not the first one I killed, but
> the one after it.  Which seems to be consistent with this snippet:

Well, obviously, because it's wrong! :-) And undocumented to boot...