Subject: Re: bug#11242: 24.1.50; Switching to rmai view buffer

From: Richard Stallman <[email-masked]>
Date: Sun, 15 Apr 2012 16:12:33 -0400

which calls `mail-bury' where we have two options to show a buffer whose
    name starts with a space, namely

    (defun mail-bury (&optional arg)
       ...
	 (bury-buffer (current-buffer)) <---------- HERE
	 ...
	   (switch-to-buffer newbuf)))) <----------- OR HERE

It's neither one.  It's done by this code.

    ;; If there is an Rmail buffer, return to it nicely
    ;; even if this message was not started by an Rmail command.
    (unless return-action
      (dolist (buffer (buffer-list))
	(if (eq (buffer-local-value 'major-mode buffer) 'rmail-mode)
	    (setq return-action `(rmail-mail-return ,newbuf)))))

When the bug occurs, NEWBUF is the message view buffer.
It was returned by other-buffer.

    (defun wcch ()
       (when (get-buffer-window " *message-viewer RMAIL*" t)
	 (backtrace)))

    (add-hook 'window-configuration-change-hook 'wcch)

    in your .emacs and when it triggers post the backtrace here.

There is no need.  I already said how that buffer gets selected:
later in mail-bury, where it handles return-action.

--
Dr Richard Stallman
President, Free Software Foundation
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