Description: 

[FFJ Build 010803 CE, Red Hat Linux 6.2 with JDK 1.3.1]

Steps to reproduce:
-------------------
1) Copy-Paste a Attributies node
2) in the Explorere expand copy of the Attributies node
3) rename an expanded anttribute

IDE throws:

Wed Aug 08 14:40:14 CEST 2001: java.lang.NullPointerException: Posted StackTrace
Annotation: Exception occurred in Request Processor
org.openide.util.RequestProcessor$Holder: Posted StackTrace(task xxx@xxxx
[-5820973, 1, -1])
        at
org.openide.util.RequestProcessor$Task.createHolder(RequestProcessor.java:322)
        at org.openide.util.RequestProcessor.post(RequestProcessor.java:100)
        at org.openide.util.RequestProcessor.post(RequestProcessor.java:73)
        at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:89)
        at
org.openide.awt.Actions$ButtonBridge.actionPerformed(Actions.java:351)
        at
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1450)
        at
javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1504)
        at
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:378)
        at
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:279)
[catch] at
javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:886)
        at java.awt.Component.processMouseEvent(Component.java:3715)
        at java.awt.Component.processEvent(Component.java:3544)
        at java.awt.Container.processEvent(Container.java:1164)
        at java.awt.Component.dispatchEventImpl(Component.java:2593)
        at java.awt.Container.dispatchEventImpl(Container.java:1213)
        at java.awt.Component.dispatchEvent(Component.java:2497)
        at
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2216)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
        at java.awt.Container.dispatchEventImpl(Container.java:1200)
        at java.awt.Window.dispatchEventImpl(Window.java:914)
        at java.awt.Component.dispatchEvent(Component.java:2497)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:339)
        at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)
 
Wed Aug 08 14:40:14 CEST 2001: java.lang.NullPointerException: null
java.lang.NullPointerException
        at
java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:230)
        at
java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:234)
        at
org.netbeans.modules.xml.tree.event.TreeEventChangeSupport.firePropertyChangeNow(TreeEventChangeSupport.java:167)
        at
org.netbeans.modules.xml.tree.event.TreeEventManager.firePropertyChange(TreeEventManager.java:113)
        at
org.netbeans.modules.xml.tree.event.TreeEventChangeSupport.firePropertyChange(TreeEventChangeSupport.java:161)
        at
org.netbeans.modules.xml.tree.TreeObject.firePropertyChange(TreeObject.java:304)
        at
org.netbeans.modules.xml.tree.TreeObject.firePropertyChange(TreeObject.java:346)
        at
org.netbeans.modules.xml.tree.TreeAttribute.setTreeNameImpl(TreeAttribute.java:213)
        at
org.netbeans.modules.xml.tree.TreeAttribute.setTreeName(TreeAttribute.java:232)
        at
org.netbeans.modules.xml.tree.TreeAttribute.setQName(TreeAttribute.java:197)
        at
org.netbeans.modules.xml.node.AttributeNode.setPresentableNameProperty(AttributeNode.java:78)
        at
org.netbeans.modules.xml.node.AbstractObjectNode.updatePresentableNameProperty(AbstractObjectNode.java:201)
        at
org.netbeans.modules.xml.node.AbstractObjectNode.setNameImpl(AbstractObjectNode.java:241)
        at
org.netbeans.modules.xml.node.AbstractObjectNode.setName(AbstractObjectNode.java:252)
        at org.openide.nodes.FilterNode.setName(FilterNode.java:219)
        at org.openide.actions.RenameAction.performAction(RenameAction.java:73)
        at org.openide.util.actions.NodeAction.performAction(NodeAction.java:92)
        at
org.openide.util.actions.NodeAction.actionPerformed(NodeAction.java:83)
        at org.netbeans.core.ModuleActions$1.run(ModuleActions.java:76)
        at org.openide.util.Task.run(Task.java:124)
[catch] at
org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:626)


Work Around: 
1) Copy Attributes node as colection of attributes.
2) Copy Attributes node save the document and next rename attribute.


Evaluation: 

xxx@xxxx 2001-09-21 This is error in clone method.

A comment.