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Re: Strange error caused by post-command-hook.

From: ishikawa
Subject: Re: Strange error caused by post-command-hook.
Date: Wed, 11 Jul 2007 18:30:21 +0900
User-agent: Thunderbird (X11/20070509)

Dear Martin Rudalics,

Thank you for the suggestion.

I have inserted the re-defined find-file in my .emacs file.
Once the problem returns, I will report the value of
(Aha, I see that the problem may happen before find-file gets executed.
How complicated...)

Chiaki Ishikawa

martin rudalics wrote:
 > [...] once the following message begins to appear in the
 > minibuffer whenever a minibuffer interaction is attemped,
 >   Error in post-command-hook: (error Selecting deleted buffer)
 > this message seems to re-appear (almost) always in the mini-buffer.
 > This message obscures the prompt message which should have been shown
 > in the first place.  For example, if I type C-c C-f, the default
 > directory usually shown is obscured with overlapping message (above).
 > (Funny if I type C-c C-v, the error message doesn't show up.)

Do you intend the commands `find-file' and `find-alternate-file' here?
You could try to add ...

(defun find-file (filename &optional wildcards)
     (when post-command-hook
       (message "... %s" post-command-hook) (sit-for 1))
(find-file-read-args "Find file: " nil))) (let ((value (find-file-noselect filename nil nil wildcards)))
    (if (listp value)
    (mapcar 'switch-to-buffer (nreverse value))
      (switch-to-buffer value))))

... to your .emacs.  As soon as `find-file' triggers the message _and_
the error please tell us the value for `post-command-hook' printed by
the message (although your observations indicate that the error is
triggered _before_ the command gets executed).

 > Now, from reading the "C-H v" help message for 'post-command-hook', if
 > an error occurs when the hook is run from post-command-hook,
 > the hook is set to nil.  But if this is set to "nil" permanently, I
 > should not see this repetition of the same error message over and over
 > again. (Correct?)
> Does this mean that whatever is causing the incorrect hook to be installed
 > is trying to install this invalid hook again and again?


 > <<< Press Return to bury the buffer list >>>

This seems to come from `electric-buffer-list' which I don't know.
AFAICT it doesn't install a `post-command-hook' though.

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