Comment 2 for bug 1309968

StacktraceTop:
 XVisualIDFromVisual (visual=0x0) at ../../src/Misc.c:60
 gdk_x11_window_foreign_new_for_display (display=0x1751080, window=29360210) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkwindow-x11.c:936
 gdk_x11_screen_get_active_window (screen=0x1756040) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkscreen-x11.c:1098
 os_scrollbar_map (widget=0x1ae82c0) at /build/buildd/overlay-scrollbar-0.2.16/./os/os-scrollbar.c:3333
 _g_closure_invoke_va (closure=0x1727b90, return_value=0x0, instance=0x1ae82c0, args=0x7ffffe0da678, n_params=0, param_types=<optimized out>) at /build/buildd/glib2.0-2.32.4/./gobject/gclosure.c:840