[Bug: 21.5-b28] XEmacs/gnus refuses to open newsgroup with identical messages

[Thomas Overgaard]

On Saturday 06 October 2007 18:09, Reiner Steib wrote: 

Problem solved, see later.

> Please provide more information.  Error message?  Which author?

It was the infamous "Wrong type argument: arrayp," followed by the headers 
from one of the messages.

> Message-IDs of "duplicate messages"?  BTW, I don't understand what you
> mean with the term "duplicate" or "identical" message.  In Usenet,
> articles cannot be identical because at least the Message-IDs need to
> be unique, else the news server would refuse to accept the second
> message.
>
The author is Stanislaw Flatto <compaid at brownbear.com.au> and he has started 
to post his messages to two different servers simultaneously, and of cause 
the headers like Message-ID differ.
>
> Could be a problem when sorting by date.  I can't reproduce the
> problem when entering alt.os.linux.slackware (with ~1000) articles and
> `gnus-thread-sort-functions' set to '(gnus-thread-sort-by-date).

I've been using this setting for years:
(setq gnus-thread-sort-functions
      '(gnus-article-sort-by-number (not gnus-thread-sort-by-date)))

So far this has only been a problem two or three times before, but now it has 
become a real issue. So now I changed it to:
(setq gnus-thread-sort-functions
      '((not gnus-thread-sort-by-date)))

Problem solved, thanks for the pointer and sorry for the inconvenience.
-- 
Thomas Overgaard
Markledet 16
6950 Ringkjøbing

Thomas at Overgaard.mail.dk