java.lang.reflect.InvocationTargetException: java.lang.NullPointerException
        at org.netbeans.modules.debugger.support.java.JavaDebugger.getVariablesFilter(JavaDebugger.java:359)
        at org.netbeans.modules.debugger.support.java.JavaWatch.getVariablesFilter(JavaWatch.java:143)
        at org.netbeans.modules.debugger.support.java.nodes.JavaWatchNode.computeName(JavaWatchNode.java:201)
        at org.netbeans.modules.debugger.support.java.nodes.JavaVariableNode.init(JavaVariableNode.java:128)
        at org.netbeans.modules.debugger.support.java.nodes.JavaVariableNode.<init>(JavaVariableNode.java:109)
        at org.netbeans.modules.debugger.support.java.nodes.JavaWatchNode.<init>(JavaWatchNode.java:77)
        at java.lang.reflect.Constructor.newInstance(Native Method)
        at org.netbeans.modules.debugger.NodesRegistry.getNode(NodesRegistry.java:177)
        at org.netbeans.modules.debugger.NodesRegistry.getNode(NodesRegistry.java:115)
        at org.netbeans.modules.debugger.NodesRegistry.getNode(NodesRegistry.java:82)
        at org.netbeans.modules.debugger.support.nodes.DebuggerNode.createNode(DebuggerNode.java:80)
        at org.netbeans.modules.debugger.support.nodes.WatchesRootNode$WatchesRootChildren.createNodes(WatchesRootNode.java:195)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1817)
        at org.openide.nodes.Children.refreshEntry(Children.java:806)
        at org.openide.nodes.Children$Keys.refreshKey(Children.java:1651)
        at org.netbeans.modules.debugger.support.nodes.WatchesRootNode$WatchesRootChildren.refreshHelper(WatchesRootNode.java:234)
        at org.netbeans.modules.debugger.support.nodes.WatchesRootNode$WRListener.refreshWatches(WatchesRootNode.java:363)
        at org.netbeans.modules.debugger.support.nodes.WatchesRootNode$WRListener.propertyChange(WatchesRootNode.java:359)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:152)
        at org.netbeans.modules.debugger.delegator.DelegatingWatch.firePropertyChange(DelegatingWatch.java:329)
        at org.netbeans.modules.debugger.delegator.DelegatingWatch.setInnerWatch(DelegatingWatch.java:325)
        at org.netbeans.modules.debugger.delegator.DelegatingWatch.validate(DelegatingWatch.java:126)
        at org.netbeans.modules.debugger.delegator.DelegatingWatch.setVariableName(DelegatingWatch.java:262)
        at org.openide.actions.DebuggerPerformer$AddWatchPerformer.performAction(DebuggerPerformer.java:198)
        at org.openide.util.actions.CallbackSystemAction.performAction(CallbackSystemAction.java:78)
        at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:66)
        at org.netbeans.core.ModuleActions$1.run(ModuleActions.java:86)
        at org.openide.util.Task.run(Task.java:152)
        at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:611)