Program: 96266
Project: 96266
Buggy source:
public _GtkStatusIconTray(final SystemTray systemTray){
  super();
  Gtk.startGui();
  Gtk.dispatch(new Runnable(){
    @Override public void run(){
      trayIcon=Gtk.gtk_status_icon_new();
      final GEventCallback gtkCallback=new GEventCallback(){
        @Override public void callback(        Pointer notUsed,        final GdkEventButton event){
          if (event.type == 4) {
            SwingUtil.invokeLater(popupRunnable);
          }
        }
      }
;
      final NativeLong button_press_event=Gobject.g_signal_connect_object(trayIcon,"String_Node_Str",gtkCallback,null,0);
      gtkCallbacks.add(gtkCallback);
      gtkCallbacks.add(button_press_event);
    }
  }
);
  Gtk.waitForStartup();
  Gtk.dispatch(new Runnable(){
    @Override public void run(){
      Gtk.gtk_status_icon_set_title(trayIcon,"String_Node_Str");
      if (SystemTray.isJavaFxLoaded) {
        Gtk.gtk_status_icon_set_name(trayIcon,"String_Node_Str");
      }
    }
  }
);
  SwingUtil.invokeLater(new Runnable(){
    @Override public void run(){
      final SwingMenu swingMenu=new SwingMenu(null){
        @Override public void setEnabled(        final MenuItem menuItem){
          Gtk.dispatch(new Runnable(){
            @Override public void run(){
              boolean enabled=menuItem.getEnabled();
              if (visible && !enabled) {
                Gtk.gtk_status_icon_set_visible(trayIcon,enabled);
                visible=false;
              }
 else               if (!visible && enabled) {
                Gtk.gtk_status_icon_set_visible(trayIcon,enabled);
                visible=true;
              }
            }
          }
);
        }
        @Override public void setImage(        final MenuItem menuItem){
          imageFile=menuItem.getImage();
          if (imageFile == null) {
            return;
          }
          Gtk.dispatch(new Runnable(){
            @Override public void run(){
              Gtk.gtk_status_icon_set_from_file(trayIcon,imageFile.getAbsolutePath());
              if (!isActive) {
                isActive=true;
                Gtk.gtk_status_icon_set_visible(trayIcon,true);
              }
            }
          }
);
          SwingUtil.invokeLater(new Runnable(){
            @Override public void run(){
              ((TrayPopup)_native).setTitleBarImage(imageFile);
            }
          }
);
        }
        @Override public void setText(        final MenuItem menuItem){
        }
        @Override public void setShortcut(        final MenuItem menuItem){
        }
        @Override public void remove(){
          if (!shuttingDown.getAndSet(true)) {
            Gtk.dispatch(new Runnable(){
              @Override public void run(){
                Gtk.gtk_status_icon_set_visible(trayIcon,false);
                Gobject.g_object_unref(trayIcon);
                trayIcon=null;
                gtkCallbacks.clear();
              }
            }
);
            Gtk.shutdownGui();
            super.remove();
          }
        }
      }
;
      JPopupMenu popupMenu=(JPopupMenu)swingMenu._native;
      popupMenu.pack();
      popupMenu.setFocusable(true);
      popupRunnable=new Runnable(){
        @Override public void run(){
          Point point=MouseInfo.getPointerInfo().getLocation();
          TrayPopup popupMenu=(TrayPopup)swingMenu._native;
          popupMenu.doShow(point,0);
        }
      }
;
      bind(swingMenu,null,systemTray);
    }
  }
);
}

Fixed version (ground truth):
public _GtkStatusIconTray(final SystemTray systemTray){
  super();
  Gtk.startGui();
  Gtk.dispatch(new Runnable(){
    @Override public void run(){
      trayIcon=Gtk.gtk_status_icon_new();
      final GEventCallback gtkCallback=new GEventCallback(){
        @Override public void callback(        Pointer notUsed,        final GdkEventButton event){
          if (event.type == 4) {
            SwingUtil.invokeLater(popupRunnable);
          }
        }
      }
;
      final NativeLong button_press_event=Gobject.g_signal_connect_object(trayIcon,"String_Node_Str",gtkCallback,null,0);
      gtkCallbacks.add(gtkCallback);
      gtkCallbacks.add(button_press_event);
    }
  }
);
  Gtk.waitForStartup();
  Gtk.dispatch(new Runnable(){
    @Override public void run(){
      Gtk.gtk_status_icon_set_title(trayIcon,"String_Node_Str");
      if (System.getProperty("String_Node_Str","String_Node_Str").equals("String_Node_Str")) {
        Gtk.gtk_status_icon_set_name(trayIcon,"String_Node_Str");
      }
    }
  }
);
  SwingUtil.invokeLater(new Runnable(){
    @Override public void run(){
      final SwingMenu swingMenu=new SwingMenu(null){
        @Override public void setEnabled(        final MenuItem menuItem){
          Gtk.dispatch(new Runnable(){
            @Override public void run(){
              boolean enabled=menuItem.getEnabled();
              if (visible && !enabled) {
                Gtk.gtk_status_icon_set_visible(trayIcon,enabled);
                visible=false;
              }
 else               if (!visible && enabled) {
                Gtk.gtk_status_icon_set_visible(trayIcon,enabled);
                visible=true;
              }
            }
          }
);
        }
        @Override public void setImage(        final MenuItem menuItem){
          imageFile=menuItem.getImage();
          if (imageFile == null) {
            return;
          }
          Gtk.dispatch(new Runnable(){
            @Override public void run(){
              Gtk.gtk_status_icon_set_from_file(trayIcon,imageFile.getAbsolutePath());
              if (!isActive) {
                isActive=true;
                Gtk.gtk_status_icon_set_visible(trayIcon,true);
              }
            }
          }
);
          SwingUtil.invokeLater(new Runnable(){
            @Override public void run(){
              ((TrayPopup)_native).setTitleBarImage(imageFile);
            }
          }
);
        }
        @Override public void setText(        final MenuItem menuItem){
        }
        @Override public void setShortcut(        final MenuItem menuItem){
        }
        @Override public void remove(){
          if (!shuttingDown.getAndSet(true)) {
            Gtk.dispatch(new Runnable(){
              @Override public void run(){
                Gtk.gtk_status_icon_set_visible(trayIcon,false);
                Gobject.g_object_unref(trayIcon);
                trayIcon=null;
                gtkCallbacks.clear();
              }
            }
);
            Gtk.shutdownGui();
            super.remove();
          }
        }
      }
;
      JPopupMenu popupMenu=(JPopupMenu)swingMenu._native;
      popupMenu.pack();
      popupMenu.setFocusable(true);
      popupRunnable=new Runnable(){
        @Override public void run(){
          Point point=MouseInfo.getPointerInfo().getLocation();
          TrayPopup popupMenu=(TrayPopup)swingMenu._native;
          popupMenu.doShow(point,0);
        }
      }
;
      bind(swingMenu,null,systemTray);
    }
  }
);
}