elscreen-start fails

[sanderboer]

emacs 24.3 on windows.

elscreen-start fails with "wrong type argument consp, nil"

I tried to eval elscreen.el bit by bit, this function fails with this error:

(defun elscreen-mode-line-update ()
(when (elscreen-screen-modified-p 'elscreen-mode-line-update)
(setq elscreen-mode-line-string
(format "[%d]" (elscreen-get-current-screen)))
(force-mode-line-update)))

(let ((point (memq 'mode-line-position mode-line-format))
(elscreen-mode-line-elm '(elscreen-display-screen-number
(" " elscreen-mode-line-string))))
(when (null (member elscreen-mode-line-elm mode-line-format))
(setcdr point (cons elscreen-mode-line-elm (cdr point)))))

[zenzike]

I'm also getting this problem on emacs 24.3.1 running on OSX: moving (elscreen-start) to near the beginning of my .emacs script fixed this.

[Eagleeye777]

Same here

[nispio]

This error happened to me too when I modified my mode-line-format. Currently, elscreen assumes that mode-line-format contains mode-line-position at some point. I fixed it by waiting to modify my mode-line until after running elscreen-start.

This issue could probably be fixed in elscreen fairly easily. I'm willing to propose a solution if @knu would consider pulling it.

[aki-s]

@nispio @knu
Just changing https://github.com/knu/elscreen/blob/master/elscreen.el#L1297
to
(when (and (null (member elscreen-mode-line-elm mode-line-format)) point)
seems to be the best answer.