Re: Strange behavior editing a file from Dired

[Eli Zaretskii <eliz@gnu.org>]

> From: Richard Stallman <rms@gnu.org>
> Date: Thu, 08 Dec 2016 15:35:51 -0500
> 
> When I review mails before sending them out, I move down through
> a Dired buffer typing C-o.  Sometimes I switch to the other window
> and type C-x 1, edit that message file, and save it.  Then I switch
> back to the Dired buffer.
> 
> Occasionally I find that point has moved up some number of lines in
> the Dired buffer.  The number of lines varies.
> 
> This has been happening for months.
> 
> When I notice it, I type C-h l, but I have not noticed anything
> significant in the output.  And I have not been able to reproduce it.
> 
> Has anyone else seen something like this?

I haven't, but I don't use Dired much with this paradigm.

I would suggest to define some appropriate hook (pos-command-hook, if
nothing better exists) that watches the value of point in that buffer,
and signals an error when it changes.  Then you might be able to catch
the villain red-handed.