Emacs24: "Marker points into wrong buffer"

[Uday Reddy]

Rene reports (viewmail-info, 2013-09-04)

I just upgraded emacs24 (emacs-snapshot 2:20130831-1~bpo70+1 taken from
http://emacs.naquadah.org/) which works great.

But it turns out that VM now invariably run into the following problem:

           "Marker points into wrong buffer"

which prevents me from reading/dealing with old and new emails.

[Uday Reddy (reddyuday)]

Again from Rene:

I just removed this line

   (vm-summary-faces-mode 1)

from my .vm.preferences and the problem went away.

Now I'm back with the latest version of emacs24.

[Göran Uddeborg (goeran-uddeborg)]

I got the same problem when moving from emacs 24.3 to emacs 24.4 in the upgrade from Fedora 20 to Fedora 21. It's repeatable using the attached inbox. Start "emacs -q", and then

M-x vm-visit-folder INBOX
M-x vm-summary-faces-mode

This gives the error message: Marker points into wrong buffer: #<marker at 51 in INBOX>

If enabling debugging, I get the backtrace below:

Debugger entered--Lisp error: (error "Marker points into wrong buffer" #<marker at 51 in INBOX>)
  goto-char(#<marker at 51 in INBOX>)
  (save-restriction (widen) (goto-char (vm-headers-of (vm-real-message-of m))) (re-search-forward arg (vm-text-of (vm-real-message-of m)) t))
  (save-excursion (save-restriction (widen) (goto-char (vm-headers-of (vm-real-message-of m))) (re-search-forward arg (vm-text-of (vm-real-message-of m)) t)))
  vm-vs-header([[#<marker at 1 in INBOX> #<marker at 51 in INBOX> #<marker at 51 in INBOX> #<marker at 117 in INBOX> #<marker at 121 in INBOX> #<marker at 122 in INBOX>] ["1" " 1" nil #<marker at 1 in INBOX Summary> #<marker at 59 in INBOX Summary> <<>> <-- From_ "0" #<buffer INBOX> nil nil nil nil nil nil none none #<overlay from 1 to 59 in INBOX Summary> nil] [t nil nil nil nil nil nil nil nil] ["4" "Wednesday" "24" "December" "2014" "20:38:15" "" "<email address hidden>" "<email address hidden>" nil "1" "Subject" "^From:" nil nil "12" nil nil (number " " mark "N <email address hidden> Dec 24 1/4 " thread-indent "\"Subject\"\n") nil nil nil nil nil nil nil] [nil <v> nil nil nil nil]] "Priority: urgent")
  apply(vm-vs-header [[#<marker at 1 in INBOX> #<marker at 51 in INBOX> #<marker at 51 in INBOX> #<marker at 117 in INBOX> #<marker at 121 in INBOX> #<marker at 122 in INBOX>] ["1" " 1" nil #<marker at 1 in INBOX Summary> #<marker at 59 in INBOX Summary> <<>> <-- From_ "0" #<buffer INBOX> nil nil nil nil nil nil none none #<overlay from 1 to 59 in INBOX Summary> nil] [t nil nil nil nil nil nil nil nil] ["4" "Wednesday" "24" "December" "2014" "20:38:15" "" "<email address hidden>" "<email address hidden>" nil "1" "Subject" "^From:" nil nil "12" nil nil (number " " mark "N <email address hidden> Dec 24 1/4 " thread-indent "\"Subject\"\n") nil nil nil nil nil nil nil] [nil <v> nil nil nil nil]] "Priority: urgent")
  (setq arglist (cdr (car selectors)) arglist (cdr (car selectors)) result (apply function m arglist) selectors (if result nil (cdr selectors)))
  (while selectors (setq selector (car (car selectors)) function (cdr (assq selector vm-virtual-selector-function-alist))) (if (null function) (error "Invalid virtual selector: %s" selector)) (setq arglist (cdr (car selectors)) arglist (cdr (car selectors)) result (apply function m arglist) selectors (if result nil (cdr selectors))))
  (let ((result nil) selector arglist function) (while selectors (setq selector (car (car selectors)) function (cdr (assq selector vm-virtual-selector-function-alist))) (if (null function) (error "Invalid virtual selector: %s" selector)) (setq arglist (cdr (car selectors)) arglist (cdr (car selectors)) result (apply function m arglist) selectors (if result nil (cdr selectors)))) result)
  vm-vs-or([[#<marker at 1 in INBOX> #<marker at 51 in INBOX> #<marker at 51 in INBOX> ...

[Uday Reddy (reddyuday)]

Göran Uddeborg writes:

> I got the same problem when moving from emacs 24.3 to emacs 24.4 in the
> upgrade from Fedora 20 to Fedora 21. It's repeatable using the attached
> inbox. Start "emacs -q", and then
>
> M-x vm-visit-folder INBOX
> M-x vm-summary-faces-mode

vm-summary-faces-mode is an add-on and is probably broken. See NEWS file
under 8.1.93a (2010-08-28).

Cheers,
Uday

[Göran Uddeborg (goeran-uddeborg)]

I see. My experiment was done using the officially released 8.1.2, but then I guess it was just as broken by that time.

[Uday Reddy (reddyuday)]

Göran Uddeborg writes:

> I see. My experiment was done using the officially released 8.1.2, but
> then I guess it was just as broken by that time.

Yes, emacs at that time was more tolerant of certain bugs. Now it is
stricter.

[Jeff Mincy (jeff-delphioutpost)]

I just debugged this problem. The default value for vm-summary-faces-alist has (header "Priority: urgent") and other header for vm-summary-high-priority. This can be fixed by selecting the folder-buffer in vm-vs-header. EG:
     (defun vm-vs-header (m arg)
       (save-excursion
         ;; JWM fix
         (vm-select-folder-buffer)
         (save-restriction
           (widen)
           (goto-char (vm-headers-of (vm-real-message-of m)))
           (re-search-forward arg (vm-text-of (vm-real-message-of m)) t))))