Run the following test case. Repeatedly show the PopupMenu on the Label and
the Button by right clicking on each of them. Java will crash after a few
clicks. I am only seeing the crash when the JIT is turned on, so this may be
a JIT bug. The crash occurs with both native and green threads.

The test case runs fine on 1.2fcs.


import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.util.Hashtable;

public class action4
    extends Frame
    implements ActionListener, MouseListener {

  PopupMenu pm = new PopupMenu();

  public static void main (String argv[]) {
    new action4();
  }

  public action4() {
    MenuItem item = new MenuItem("file-1");
    item.addActionListener(this);
    Menu m = new Menu("file");
    m.add(item);
    item = new MenuItem("file-2");
    m.add(item);
    MenuBar mb = new MenuBar();
    mb.add(m);

    setMenuBar(mb);
    setSize(100, 100);
    setLayout(new BorderLayout());

    Label l = new Label("label");
    addPopup(l, "label");
    add(l, "North");

    Panel p = new Panel();
    addPopup(p, "Panel");
    add(p, "Center");

    Button b = new Button("button");
    addPopup(b, "button");
    add(b, "South");

    show();
  }

  public void actionPerformed(ActionEvent e) {
    System.out.println("actionPerformed, event=" + e + ", mod=" + getMods(e));
    System.out.println(" command=" + e.getActionCommand());
    System.out.println(" param=" + e.paramString());
    System.out.println(" source=" + e.getSource());
  }

  String getMods(ActionEvent e) { return getMods(e.getModifiers()); }

  String getMods(MouseEvent e) { return getMods(e.getModifiers()); }

  String getMods(int mods) {
    String modstr = "";
    if ((mods & ActionEvent.SHIFT_MASK) == ActionEvent.SHIFT_MASK)
      modstr += (" SHIFT");
    if ((mods & ActionEvent.ALT_MASK) == ActionEvent.ALT_MASK)
      modstr += (" ALT");
    if ((mods & ActionEvent.CTRL_MASK) == ActionEvent.CTRL_MASK)
      modstr += (" CTRL");
    if ((mods & ActionEvent.META_MASK) == ActionEvent.META_MASK)
      modstr += (" META");
    return modstr;
  }

  public void mouseClicked (MouseEvent e) {
    mouseAction("mouseClicked", e);
  }

  public void mouseEntered (MouseEvent e) {
    // System.out.println("mouseEntered " + e);
    // printMods(e.getModifiers());
  }

  public void mouseExited (MouseEvent e) {
    // System.out.println("mouseExited " + e);
    // printMods(e.getModifiers());
  }

  public void mousePressed (MouseEvent e) {
    mouseAction("mousePressed", e);
    // System.out.println("mousePressed " + e);
    // printMods(e.getModifiers());
  }

  public void mouseReleased (MouseEvent e) {
    mouseAction("mouseReleased", e);
    // System.out.println("mouseReleased " + e);
    // printMods(e.getModifiers());
  }

  void mouseAction (String which, MouseEvent e) {
    Component c = e.getComponent();
    System.out.println(which + "e=" + e + ", mods=" + getMods(e) +
                       ", component=" + c);
    if (e.isPopupTrigger()) {
      System.out.println("isPopup");
      PopupMenu pm = getHash(c);
      pm.show(c, c.getSize().width/2, c.getSize().height/2);
    }
  }


  void addPopup(Component c, String name) {
    PopupMenu pm = new PopupMenu();
    MenuItem mi = new MenuItem(name + "-1");
    mi.addActionListener(this);
    pm.add(mi);

    mi = new MenuItem(name + "-2");
    pm.add(mi);

    setHash(c, pm);
    c.add(pm);
    c.addMouseListener(this);
  }


  Hashtable popupTable = new Hashtable();

  void setHash(Component c, PopupMenu p) {
    popupTable.put(c, p);
  }

  PopupMenu getHash(Component c) {
    return (PopupMenu)(popupTable.get(c));
  }

}

Stack backtrace:
SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_MAPERR [addr: 0x4]

        stackpointer=fe704a74

Full thread dump Classic VM (JDK-1.2.2-H, native threads):
    "Screen Updater" (TID:0xfacc0720, sys_thread_t:0x533280, state:CW, native ID:0xa) prio=4
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java, Compiled Code)
        at sun.awt.ScreenUpdater.run(ScreenUpdater.java, Compiled Code)
    "Thread-0" (TID:0xfacb8d28, sys_thread_t:0x2ee50, state:CW, native ID:0x1) prio=5
    "AWT-Motif" (TID:0xfacc0500, sys_thread_t:0x4ca430, state:MW, native ID:0x9) prio=5
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "SunToolkit.PostEventQueue-0" (TID:0xfacc0518, sys_thread_t:0x4ac8a8, state:CW, native ID:0x8) prio=5
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.PostEventQueue.run(SunToolkit.java, Compiled Code)
    "AWT-EventQueue-0" (TID:0xfacc08f8, sys_thread_t:0x4a1af8, state:R, native ID:0x7) prio=6
        at sun.awt.motif.MPopupMenuPeer.pShow(Native Method)
        at sun.awt.motif.MPopupMenuPeer.show(MPopupMenuPeer.java, Compiled Code)
        at java.awt.PopupMenu.show(PopupMenu.java, Compiled Code)
        at action4.mouseAction(action4.java, Compiled Code)
        at action4.mousePressed(action4.java, Compiled Code)
        at java.awt.Component.processMouseEvent(Component.java, Compiled Code)
        at java.awt.Component.processEvent(Component.java, Compiled Code)
        at java.awt.Container.processEvent(Container.java, Compiled Code)
        at java.awt.Component.dispatchEventImpl(Component.java, Compiled Code)
        at java.awt.Container.dispatchEventImpl(Container.java, Compiled Code)
        at java.awt.Component.dispatchEvent(Component.java, Compiled Code)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java, Compiled Code)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java, Compiled Code)
    "Finalizer" (TID:0xfac98320, sys_thread_t:0x6e2b0, state:CW, native ID:0x6) prio=8
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Code)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Code)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:174)
    "Reference Handler" (TID:0xfac983b0, sys_thread_t:0x6c748, state:CW, native ID:0x5)
 prio=10
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:114)
    "Signal dispatcher" (TID:0xfac983e0, sys_thread_t:0x65238, state:CW, native ID:0x4) prio=5
Monitor Cache Dump:
    java.lang.Class@FACA95C8/FAD40018: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
        Waiting to enter:
            "AWT-Motif" (0x4ca430)
    sun.awt.ScreenUpdater@FACC0720/FADAE7D0: <unowned>
        Waiting to be notified:
            "Screen Updater" (0x533280)
    sun.awt.PostEventQueue@FACC0518/FAD7D5D8: <unowned>
        Waiting to be notified:
            "SunToolkit.PostEventQueue-0" (0x4ac8a8)
    java.lang.ref.ReferenceQueue$Lock@FAC98338/FACCDCD8: <unowned>
        Waiting to be notified:
            "Finalizer" (0x6e2b0)
    java.lang.ref.Reference$Lock@FAC983C0/FACCD8A8: <unowned>
        Waiting to be notified:
            "Reference Handler" (0x6c748)
    java.awt.Component$AWTTreeLock@FACA0020/FACFC838: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
    Thread queue lock: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
        Waiting to be notified:
            "Thread-0" (0x2ee50)
    Monitor registry: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry

SIGABRT 6* abort (generated by abort(3) routine)
    si_signo [6]: SIGABRT 6* abort (generated by abort(3) routine)
    si_errno [0]: Error 0
    si_code [-1]: SI_LWP [pid: 19408, uid: 71346]
        stackpointer=fe704244

Full thread dump Classic VM (JDK-1.2.2-H, native threads):
    "Screen Updater" (TID:0xfacc0720, sys_thread_t:0x533280, state:CW, native ID:0xa) prio=4
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java, Compiled Code)
        at sun.awt.ScreenUpdater.run(ScreenUpdater.java, Compiled Code)
    "Thread-0" (TID:0xfacb8d28, sys_thread_t:0x2ee50, state:CW, native ID:0x1) prio=5
    "AWT-Motif" (TID:0xfacc0500, sys_thread_t:0x4ca430, state:MW, native ID:0x9) prio=5
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "SunToolkit.PostEventQueue-0" (TID:0xfacc0518, sys_thread_t:0x4ac8a8, state:CW, native ID:0x8) prio=5
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.PostEventQueue.run(SunToolkit.java, Compiled Code)
    "AWT-EventQueue-0" (TID:0xfacc08f8, sys_thread_t:0x4a1af8, state:R, native ID:0x7) prio=6
        at sun.awt.motif.MPopupMenuPeer.pShow(Native Method)
        at sun.awt.motif.MPopupMenuPeer.show(MPopupMenuPeer.java, Compiled Code)
        at java.awt.PopupMenu.show(PopupMenu.java, Compiled Code)
        at action4.mouseAction(action4.java, Compiled Code)
        at action4.mousePressed(action4.java, Compiled Code)
        at java.awt.Component.processMouseEvent(Component.java, Compiled Code)
        at java.awt.Component.processEvent(Component.java, Compiled Code)
        at java.awt.Container.processEvent(Container.java, Compiled Code)
        at java.awt.Component.dispatchEventImpl(Component.java, Compiled Code)
        at java.awt.Container.dispatchEventImpl(Container.java, Compiled Code)
        at java.awt.Component.dispatchEvent(Component.java, Compiled Code)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java, Compiled Code)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java, Compiled Code)
    "Finalizer" (TID:0xfac98320, sys_thread_t:0x6e2b0, state:CW, native ID:0x6) prio=8
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Code)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Code)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:174)
    "Reference Handler" (TID:0xfac983b0, sys_thread_t:0x6c748, state:CW, native ID:0x5) prio=10
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:114)
    "Signal dispatcher" (TID:0xfac983e0, sys_thread_t:0x65238, state:CW, native ID:0x4)
 prio=5
Monitor Cache Dump:
    java.lang.Class@FACA95C8/FAD40018: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
        Waiting to enter:
            "AWT-Motif" (0x4ca430)
    sun.awt.ScreenUpdater@FACC0720/FADAE7D0: <unowned>
        Waiting to be notified:
            "Screen Updater" (0x533280)
    sun.awt.PostEventQueue@FACC0518/FAD7D5D8: <unowned>
        Waiting to be notified:
            "SunToolkit.PostEventQueue-0" (0x4ac8a8)
    java.lang.ref.ReferenceQueue$Lock@FAC98338/FACCDCD8: <unowned>
        Waiting to be notified:
            "Finalizer" (0x6e2b0)
    java.lang.ref.Reference$Lock@FAC983C0/FACCD8A8: <unowned>
        Waiting to be notified:
            "Reference Handler" (0x6c748)
    java.awt.Component$AWTTreeLock@FACA0020/FACFC838: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
    Thread queue lock: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry
        Waiting to be notified:
            "Thread-0" (0x2ee50)
    Monitor registry: owner "AWT-EventQueue-0" (0x4a1af8) 1 entry