Error during redisplay

[Bob Rogers]

   From: "Juanma Barranquero" <address@hidden>
   Date: Sun, 24 Feb 2008 03:56:36 +0100

   emacs -q --eval '(progn (ielm) (pop-to-buffer "*Messages*"))'

   => "Error during redisplay: (error Attempt to modify read-only object)"

                Juanma

I have a simpler way to reproduce what looks like the same problem:

   1.  emacs -Q

   2.  M-x shell RET

   3.  C-x C-b

It appears that, for the *shell* buffer, mode-line-process is
initialized to ":%s" in "define-derived-mode comint-mode" (comint.el
line 622), and this particular value is what format-mode-line (called
from list-buffers-noselect, buff-menu.el line 751) is complaining about.
But I'm not sure how to debug it further.

                                        -- Bob Rogers
                                           http://rgrjr.dyndns.org/