When running the basher you often see this exception.
This can probably be avoided.

java.lang.NullPointerException: bar
        at sun.awt.motif.X11Graphics.<init>(X11Graphics.java:45)
        at sun.awt.motif.MComponentPeer.getGraphics(MComponentPeer.java:154)
        at sun.awt.motif.MComponentPeer.handleExpose(MComponentPeer.java:259)
        at java.lang.Thread.run(Thread.java)