This occurs with XToolkit from tiger onwards.

I've a List which has couple of items in it. After removing the items, if the List is double clicked, it throws the following Exception:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
        at java.util.Vector.elementAt(Vector.java:432)
        at sun.awt.X11.XListPeer.mouseReleased(XListPeer.java:604)
        at sun.awt.X11.XListPeer.handleJavaMouseEvent(XListPeer.java:525)
        at sun.awt.X11.XComponentPeer.handleEvent(XComponentPeer.java:611)
        at java.awt.Component.dispatchEventImpl(Component.java:4031)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)


To reproduce, run the following testcase:

import java.awt.*;
import java.awt.event.*;

public class ListTest {

    private static List list;

    public static void main(String[] args) {
        Frame f = new Frame();
        f.setLayout(new FlowLayout());
        list = new List();
        list.add("list1");
        list.add("list2");
        f.add(list);
        Button b = new Button("Remove");
        b.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                for (int i = 0; i < list.getSelectedIndexes().length; i++) {
                    list.remove(list.getSelectedIndexes()[i]);
                }
            }
        });
        f.add(b);
        f.setSize(200, 200);
        f.setVisible(true);
    }
}

The testcase shows a List with two items and a 'Remove' button. Select each item and click the 'Remove' button to remove them. After removing both the items, double click inside the List. If the exception is thrown, bug is reproduced.