Strange window splits when viewing messages

[suvayu]

When I read an email from a search (by hitting RET) and then move on to the next email with <down> arrow, nm tries to create another nm-view window instead of updating the present one with the new message. I have attached a screen shot of Emacs when this happens.

Also I would like to say nevermore looks like a great library. I would love it if your usability features could be used from other notmuch modes. For example, I would love to use your incremental search from notmuch-tree (I like the threaded view).

[tjim]

What is <down> bound to? Mine is bound to next-line, and I don't see this behavior. If <down> is bound to something else, how does next-line behave?

[suvayu]

Sorry for the delay, I became preoccupied with more immediate things.

<down>, n, and C-n are all bound to <next-line> and I see the same behaviour with all of them. If it matters, I use notmuch emacs from the git master. Right now I am using commit 6ef676aa.

To test, this is what I do:

$ emacs -Q -l minimal-init.el

Where minimal-init.el is like this (with a few convenience stuff like faces, and variables removed):

(setq debug-on-error t
      debug-on-signal nil
      debug-on-quit nil)

(add-to-list 'load-path "/usr/share/emacs/site-lisp")
(add-to-list 'load-path "~/.emacs.d/lisp")

I then load nevermore with M-x load-library followed by M-x nm RET. Please let me know how if I can provide more information.

[tjim]

Hi. Just tried with that version of notmuch and I don't see the behavior you describe. Maybe an OS/emacs version issue? I am on OS X, 24.3.1. I think I can see how to simplify that code (nm-show-messages), if you can't debug I'll just try a pass at cleaning it up and perhaps that will help.

[suvayu]

Okay.

I'm on Fedora 20, kernel 3.15.6-200.fc20.x86_64, with an Emacs compiled from source from the emacs-24 branch: GNU Emacs 24.3.92.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.9) of 2014-07-31 on .

[tjim]

Installed fedora 20 + emacs 24.3.1 from source, don't see this behavior. (Not sure where to get 24.3.92.1) Gotta think it's something weird about your particular configuration...

[suvayu]

My Emacs is from the emacs-24 branch of the emacs git repository: git://git.savannah.gnu.org/emacs.git. I tested again with the absolute minimum of settings, I still see the problem. Of course if you cannot reproduce it, there is no way it can be fixed. If you have any other ideas that I can use to investigate and provide info, I can try that. Otherwise we should let it be, it is not a critical problem for me.

[tjim]

Thanks. I checked out from git and verified the behavior. Emacs has changed the behavior of display-buffer-below-selected. I suspect this is an emacs bug, but in any case I have pushed a workaround, give it a try.

[suvayu]

I just tested, the problem is solved with 3242368b2669! Thank you very much :)