Looking at gdk_display_get_screen(), it returns NULL if there are no
screens defined:
GdkScreen *
gdk_display_get_screen (GdkDisplay *display,
gint screen_num)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (ScreenCount (GDK_DISPLAY_X11 (display)->xdisplay) >
screen_num, NULL);
return GDK_DISPLAY_X11 (display)->screens[screen_num];
}
However, I'm not sure why it's doing so in this case...
(gdb) print ((GdkDisplayX11*)display)->xdisplay->nscreens
$45 = 1
(gdb) print screen_num
$46 = 0
(gdb) print ((GdkDisplayX11*)display)->xdisplay->screens[0]
$47 = {ext_data = 0x0, display = 0x9c7610, root = 92, width = 1280, height =
1024, mwidth = 382, mheight = 302, ndepths = 7,
depths = 0x9ce250, root_depth = 24, root_visual = 0x9ce2d0, default_gc =
0x9ce350, cmap = 32, white_pixel = 16777215,
black_pixel = 0, max_maps = 1, min_maps = 1, backing_store = 0, save_unders =
0, root_input_mask = 0}
--
GTK applications crashing reproducibly when using vesa
https://bugs.launchpad.net/bugs/246585
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