GNU bug report logs - #501
23.0.60; Viewing SVG files: Error when pressing C-v, M-v

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Markus Triska <markus.triska <at> gmx.at>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; Viewing SVG files: Error when pressing C-v, M-v
Date: Sun, 29 Jun 2008 14:37:51 +0200 (CEST)

When I open the file

   http://www.logic.at/prolog/test.svg

with "emacs -Q test.svg", and then press C-c C-c to view the image, it
is displayed correctly. When I then press C-v or M-v to scroll, I get:

   Wrong type argument: listp, t

The debug output with M-x toggle-debug-on-error is:

   Debugger entered--Lisp error: (wrong-type-argument listp t)
     image-mode-winprops(nil)
     image-mode-window-put(vscroll 17 nil)
     image-set-window-vscroll(17)
     image-next-line(31)
     image-scroll-up(nil)
     call-interactively(image-scroll-up nil nil)


In GNU Emacs 23.0.60.1 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2008-06-29 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Message #10 received at 501 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Markus Triska <markus.triska <at> gmx.at>
To: 501 <at> debbugs.gnu.org
Subject: Re: bug#501: Acknowledgement (23.0.60; Viewing SVG files: Error when  pressing C-v, M-v)
Date: Sat, 19 Jul 2008 00:37:39 +0200

The following patch fixes this problem for me.

2008-07-18  Markus Triska  <markus.triska <at> gmx.at>

	* image-mode.el (image-toggle-display): Record scroll settings
	when switching to image.

diff --git a/lisp/image-mode.el b/lisp/image-mode.el
index 00f2225..5ffbfe1 100644
--- a/lisp/image-mode.el
+++ b/lisp/image-mode.el
@@ -450,6 +450,7 @@ and showing the image as an image."
 	   (modified (buffer-modified-p)))
       (image-refresh image)
       (add-text-properties (point-min) (point-max) props)
+      (image-mode-setup-winprops)
       (set-buffer-modified-p modified)
       ;; Inhibit the cursor when the buffer contains only an image,
       ;; because cursors look very strange on top of images.

Message #15 received at 501-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 501-done <at> debbugs.gnu.org
Subject: Re: 23.0.60; Viewing SVG files: Error when pressing C-v, M-v
Date: Fri, 25 Jul 2008 01:45:00 -0400

> When I open the file
>
>    http://www.logic.at/prolog/test.svg
>
> with "emacs -Q test.svg", and then press C-c C-c to view the image, it
> is displayed correctly. When I then press C-v or M-v to scroll, I get:
>
>    Wrong type argument: listp, t

I've just checked in a fix.  Thanks.

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