set-marker and make-marker, Wrong type argument: integer-or-marker-p, nil

[ishi soichi <soichi777@gmail.com>]

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Emacs23

 This should be simple for many of you.
I am trying to develop a function that searches a word definition stored in
a dict file.

As you can see, when reading a text, you might need to look for additional
information about the encountered word.
The following function searches the information for the word in the region.


(defvar sfl-dictionary-directory "~/Dropbox/ElmLab/dict")
(defvar sfl-base-dict-file "test5.txt")

(defun sfl-search-word-meaning ()
  (interactive)
  (let ((word
 (buffer-substring (region-beginning) (region-end)))
(result))
    (with-current-buffer
     (find-file (concat sfl-dictionary-directory "/" sfl-base-dict-file))
     (goto-char (point-min))
     (search-forward word)
     (set-marker (make-marker) (beginning-of-line))
     (goto-char (end-of-line))
     (setq result (buffer-substring (region-beginning) (region-end)))
     (message result))))


But this gives an error

save-current-buffer: Wrong type argument: integer-or-marker-p, nil

It looks like (set-marker ... part is doing something wrong.

Could anyone point out the mistake I am making?

soichi

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