[pilsen_fcs 010725_1; merlin-beta-refresh (b73)]

http://openide.netbeans.org/issues/show_bug.cgi?id=13961

An attempt to expand the Tools | Options | Editor Settings node for the first
time results in NPE in the beans introspector (see attachment). From that
moment on, the node is no longer displayed as expandable.

The problem can be successfully reproduced after restarting the IDE.

Doesn't occur on JDK 1.3.1, so it's probably specific to Merlin.

Thu Jul 26 11:44:22 CEST 2001: java.lang.NullPointerException: null
java.lang.NullPointerException
        at java.beans.Introspector.processPropertyDescriptors(Introspector.java:655)
        at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:514)
        at java.beans.Introspector.getBeanInfo(Introspector.java:342)
        at java.beans.Introspector.getBeanInfo(Introspector.java:179)
        at java.beans.Introspector.getBeanInfo(Introspector.java:122)
        at org.openide.util.Utilities.getBeanInfo(Utilities.java:228)
        at org.openide.nodes.BeanNode.initialization(BeanNode.java:456)
        at org.openide.nodes.BeanNode.<init>(BeanNode.java:121)
        at org.netbeans.core.ControlPanelNode$ControlPanelItemNode.<init>(ControlPanelNode.java:153)
        at org.netbeans.core.ControlPanelNode$1.createNode(ControlPanelNode.java:162)
        at org.openide.nodes.BeanChildren.createNodes(BeanChildren.java:83)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1757)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:125)
        at org.openide.nodes.Children$Info.nodes(Children.java:880)
        at org.openide.nodes.Children.updateAdd(Children.java:688)
        at org.openide.nodes.Children.setEntries(Children.java:480)
        at org.openide.nodes.Children$18.run(Children.java:1645)
        at org.openide.util.Mutex.leave(Mutex.java:565)
        at org.openide.util.Mutex.readAccess(Mutex.java:162)
        at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:139)
        at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:170)
        at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:171)
        at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(VariableHeightLayoutCache.java:1464)
        at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(VariableHeightLayoutCache.java:1273)
        at javax.swing.tree.VariableHeightLayoutCache.ensurePathIsExpanded(VariableHeightLayoutCache.java:969)
        at javax.swing.tree.VariableHeightLayoutCache.setExpandedState(VariableHeightLayoutCache.java:167)
        at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1488)
        at javax.swing.plaf.basic.BasicTreeUI$TreeExpansionHandler.treeExpanded(BasicTreeUI.java:2306)
        at javax.swing.JTree.fireTreeExpanded(JTree.java:2241)
        at javax.swing.JTree.setExpandedState(JTree.java:3012)
        at javax.swing.JTree.expandPath(JTree.java:1747)
        at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2087)
        at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2074)
        at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2028)
        at javax.swing.plaf.basic.BasicTreeUI$MouseHandler.handleSelection(BasicTreeUI.java:2802)
        at javax.swing.plaf.basic.BasicTreeUI$MouseHandler.mousePressed(BasicTreeUI.java:2772)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:221)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:220)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:220)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:220)
        at java.awt.Component.processMouseEvent(Component.java:4965)
        at java.awt.Component.processEvent(Component.java:4778)
        at java.awt.Container.processEvent(Container.java:1383)
        at java.awt.Component.dispatchEventImpl(Component.java:3488)
        at java.awt.Container.dispatchEventImpl(Container.java:1440)
        at java.awt.Component.dispatchEvent(Component.java:3349)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3176)
[catch] at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2885)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2842)
        at java.awt.Container.dispatchEventImpl(Container.java:1426)
        at java.awt.Window.dispatchEventImpl(Window.java:1531)
        at java.awt.Component.dispatchEvent(Component.java:3349)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:439)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:131)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)