bug#37655: 27.0.50; reversing `gnus-thread-sort-by-most-recent-date' does not work properly

[Hong Xu <hong@topbug.net>]

On 10/9/19 2:04 PM, Eric Abrahamsen wrote:
> Hong Xu <hong@topbug.net> writes:
> 
>> On 10/9/19 11:55 AM, Eric Abrahamsen wrote:
>>> I can reproduce this, but oddly it only seems to have gone wrong for
>>> that one thread -- all the other threads in the mailbox seem to be
>>> sorted correctly. I also note that the Summary buffer displays the date
>>> of both messages in the thread as one day earlier than the Date header
>>> in the message itself. So I wonder if there's just something weird about
>>> one or both of the messages that's causing Gnus to handle the date
>>> incorrectly.
>>> When I have a bit more time I'll try to figure out what date Gnus is
>>> trying to use for that thread.
>>>
>>
>> On my personal messages, there is also only exactly one thread placed
>> in the wrong position. My guess is that there may be something on the
>> boundary not handled properly during sorting ...
> 
> Ah, I guess that would make sense. Are the dates also displayed
> incorrectly in the Summary format line for the messages in that thread?
> 

I don't observe incorrect date. Is there an incorrect date in the example above?

I also observed that `gnus-thread-latest-date' does not return correct dates for some messages, although they displayed as in one thread.