[java-gnome-hackers] Main loop crashes

[Jester <jsn...@gm...>]

I really like much of java-gnome but face a serious problem that may prevent me
from porting a large-scale project from swing to gtk. When I run a background
thread to retrieve some data widgets with a DrawingArea go blank. A subsequent
close action on any window will crash the main loop in the following way:

Exception in thread "main" org.gnome.glib.FatalError: Gdk-CRITICAL
gdk_window_get_position: assertion `GDK_IS_WINDOW (window)' failed
        at org.gnome.gtk.GtkMain.gtk_main(Native Method)
        at org.gnome.gtk.GtkMain.main(GtkMain.java:82)
        at org.gnome.gtk.Gtk.main(Gtk.java:119)
        at ubnz.gtk.ToolbarDemo.main(ToolbarDemo.java:326)

I've tried multiple potential workarounds, but the problem persists. Any idea
how to resolve this?

Thanks a bunch!
Jester