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java.lang.NullPointerException: 	at org.springsource.ide.eclipse.gradle.ui.cli.editor.TasksViewer.dispose(TasksViewer.java:203)	at org.springsource.ide.eclipse.gradle.ui.launch.GradleLaunchTasksTab.dispose(GradleLaunchTasksTab.java:316)	at org.eclipse.debug.ui.AbstractLaunchConfigurationTabGroup.dispose(AbstractLaunchConfigurationTabGroup.java:63)	at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupWrapper.dispose(LaunchConfigurationTabGroupWrapper.java:151)	at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.disposeTabGroup(LaunchConfigurationTabGroupViewer.java:205)	at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.dispose(LaunchConfigurationTabGroupViewer.java:197)	at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.close(LaunchConfigurationsDialog.java:348)	at org.eclipse.jface.window.Window.handleShellCloseEvent(Window.java:748)	at org.eclipse.jface.dialogs.TrayDialog.handleShellCloseEvent(TrayDialog.java:224)	at org.eclipse.jface.window.Window$3.shellClosed(Window.java:694)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:98)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1070)	at org.eclipse.swt.widgets.Decorations.closeWidget(Decorations.java:308)	at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1696)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4612)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339)	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1626)	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5023)	at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)	at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2443)	at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:496)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339)	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1626)	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5023)	at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)	at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2443)	at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:496)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339)	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1626)	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5023)	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:832)	at org.eclipse.jface.window.Window.open(Window.java:808)	at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.open(LaunchConfigurationsDialog.java:1154)	at org.eclipse.debug.ui.DebugUITools$2.run(DebugUITools.java:611)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.debug.ui.DebugUITools.openLaunchConfigurationDialogOnGroup(DebugUITools.java:619)	at org.eclipse.debug.ui.DebugUITools.openLaunchConfigurationDialogOnGroup(DebugUITools.java:552)	at org.eclipse.debug.ui.actions.OpenLaunchDialogAction.run(OpenLaunchDialogAction.java:82)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:519)	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)	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:382)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)