java.lang.NullPointerException
   at java.awt.Rectangle.<init>(Rectangle.java:197)
   at org.netbeans.editor.BaseCaret.update(BaseCaret.java:761)
   at org.netbeans.editor.BaseCaret$4.run(BaseCaret.java:725)
   at org.netbeans.editor.Utilities.runInEventDispatchThread(Utilities.java:1045)
   at org.netbeans.editor.BaseCaret.dispatchUpdate(BaseCaret.java:716)
   at org.netbeans.editor.BaseCaret.modifiedUpdate(BaseCaret.java:1438)
   at org.netbeans.editor.BaseCaret.atomicUnlock(BaseCaret.java:1455)
   at org.netbeans.editor.BaseDocument.fireAtomicUnlock(BaseDocument.java:1804)
   at org.netbeans.editor.BaseDocument.atomicUnlockImpl(BaseDocument.java:1718)
   at org.netbeans.editor.BaseDocument.atomicUnlockImpl(BaseDocument.java:1706)
   at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:326)
   at org.openide.text.NbDocument.runAtomic(NbDocument.java:436)
   at org.netbeans.modules.editor.guards.PositionBounds.setText(PositionBounds.java:248)
   at org.netbeans.modules.editor.guards.GuardedSectionImpl.setText(GuardedSectionImpl.java:181)
   at org.netbeans.modules.editor.guards.SimpleSectionImpl.setText(SimpleSectionImpl.java:76)
   at org.netbeans.api.editor.guards.SimpleSection.setText(SimpleSection.java:69)
   at org.netbeans.modules.form.JavaCodeGenerator.regenerateVariables(JavaCodeGenerator.java:1139)
   at org.netbeans.modules.form.JavaCodeGenerator.regenerateCode(JavaCodeGenerator.java:3439)
   at org.netbeans.modules.form.RADComponent.rename(RADComponent.java:533)
   at org.netbeans.modules.form.RADComponentNode.setName(RADComponentNode.java:398)
   at org.openide.actions.RenameAction.performAction(RenameAction.java:102)
   at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:586)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:583)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
   at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
   at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
   at java.awt.Component.processMouseEvent(Component.java:6505)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6270)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4492)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2719)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:696)
   at java.awt.EventQueue$4.run(EventQueue.java:694)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)