Error when dslr is created

java.lang.ArrayIndexOutOfBoundsException: 1
	at org.eclipse.swt.custom.StyledTextRenderer.getLineSize(StyledTextRenderer.java:302)
	at org.eclipse.swt.custom.StyledTextRenderer.reset(StyledTextRenderer.java:1266)
	at org.eclipse.swt.custom.StyledText.resetCache(StyledText.java:8010)
	at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:10089)
	at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:10254)
	at org.eclipse.jface.text.TextViewer.applyTextPresentation(TextViewer.java:4716)
	at org.eclipse.jface.text.TextViewer.changeTextPresentation(TextViewer.java:4766)
	at org.eclipse.jface.text.presentation.PresentationReconciler.applyTextRegionCollection(PresentationReconciler.java:559)
	at org.eclipse.jface.text.presentation.PresentationReconciler.processDamage(PresentationReconciler.java:548)
	at org.eclipse.jface.text.presentation.PresentationReconciler.access$3(PresentationReconciler.java:544)
	at org.eclipse.jface.text.presentation.PresentationReconciler$InternalListener.inputDocumentChanged(PresentationReconciler.java:118)
	at org.eclipse.jface.text.TextViewer.fireInputDocumentChanged(TextViewer.java:2759)
	at org.eclipse.jface.text.TextViewer.setDocument(TextViewer.java:2800)
	at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:660)
	at org.eclipse.jface.text.source.projection.ProjectionViewer.setDocument(ProjectionViewer.java:365)
	at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:610)
	at org.eclipse.ui.texteditor.AbstractTextEditor.initializeSourceViewer(AbstractTextEditor.java:4006)
	at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:3476)
	at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:61)
	at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:448)
	at org.drools.eclipse.editors.AbstractRuleEditor.createPartControl(AbstractRuleEditor.java:79)
	at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:241)
	at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:330)
	at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:211)
	at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:312)
	at org.drools.eclipse.dsl.editor.DSLRuleEditor2.addPages(DSLRuleEditor2.java:64)
	at org.eclipse.ui.forms.editor.FormEditor.createPages(FormEditor.java:140)
	at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:348)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:153)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:99)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:364)
	at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1005)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:970)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:137)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:412)
	at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:331)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:190)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:105)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:74)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:56)
	at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:129)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:1012)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:672)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:778)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:749)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:743)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:727)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:104)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:40)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:233)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:144)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:5831)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:212)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:36)
	at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:201)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:196)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135)
	at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78)
	at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39)
	at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:52)
	at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:60)
	at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374)
	at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:174)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:634)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:598)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:788)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:401)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1238)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3277)
	at org.eclipse.ui.internal.WorkbenchPage.access$26(WorkbenchPage.java:3192)
	at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:3174)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:71)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3169)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3133)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3123)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:563)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:518)
	at org.drools.eclipse.wizard.rule.NewRulePackagePage.finish(NewRulePackagePage.java:161)
	at org.drools.eclipse.wizard.rule.NewRulePackageWizard.performFinish(NewRulePackageWizard.java:50)
	at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:772)
	at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:411)
	at org.eclipse.jface.dialogs.Dialog.lambda$0(Dialog.java:619)
	at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:81)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5686)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1370)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4940)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4518)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
	at org.eclipse.jface.window.Window.open(Window.java:794)
	at org.eclipse.ui.internal.handlers.WizardHandler$New.executeHandler(WizardHandler.java:269)
	at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:290)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:291)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:93)
	at sun.reflect.GeneratedMethodAccessor94.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:318)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:252)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:161)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
	at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:393)
	at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:151)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
	at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5686)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1370)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4940)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4518)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1170)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1059)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:667)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:597)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:656)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:592)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1498)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1471)