(gdb) run
Starting program: /home/steve/XFCE/ristretto/src/ristretto 
[Thread debugging using libthread_db enabled]
[New Thread 0x7f338cf937d0 (LWP 12486)]

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_copy: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_new_subpixbuf: assertion `GDK_IS_PIXBUF (src_pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(ristretto:12486): GdkPixbuf-CRITICAL **: gdk_pixbuf_new_subpixbuf: assertion `GDK_IS_PIXBUF (src_pixbuf)' failed

(ristretto:12486): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f338cf937d0 (LWP 12486)]
0x00007f338beaa616 in gdk_pixbuf_get_width ()
   from /usr/lib/libgdk_pixbuf-2.0.so.0
(gdb) print pixbuf
No symbol "pixbuf" in current context.
(gdb) bt
#0  0x00007f338beaa616 in gdk_pixbuf_get_width ()
   from /usr/lib/libgdk_pixbuf-2.0.so.0
#1  0x000000000040b864 in cb_rstto_picture_viewer_queued_repaint (
    viewer=0x12c5230) at picture_viewer.c:1083
#2  0x00007f338a73e20a in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#3  0x00007f338a7418e0 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f338a741dad in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#5  0x00007f338c8e6bc7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#6  0x0000000000413bae in main (argc=1, argv=0x7fff94fcb3d8) at main.c:123
(gdb) up
#1  0x000000000040b864 in cb_rstto_picture_viewer_queued_repaint (
    viewer=0x12c5230) at picture_viewer.c:1083
1083	                    pixbuf_width = (gdouble)gdk_pixbuf_get_width (p_src_pixbuf);
(gdb)