org.eclipse.swt.SWTException: Widget is disposed
	at org.eclipse.swt.SWT.error(SWT.java:4441)
	at org.eclipse.swt.SWT.error(SWT.java:4356)
	at org.eclipse.swt.SWT.error(SWT.java:4327)
	at org.eclipse.swt.widgets.Widget.error(Widget.java:476)
	at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:413)
	at org.eclipse.swt.widgets.Control.toDisplay(Control.java:1463)
	at org.eclipse.draw2d.SWTEventDispatcher.setHoverSource(SWTEventDispatcher.java:524)
	at org.eclipse.draw2d.SWTEventDispatcher.updateHoverSource(SWTEventDispatcher.java:605)
	at org.eclipse.draw2d.SWTEventDispatcher.updateFigureUnderCursor(SWTEventDispatcher.java:576)
	at org.eclipse.gef.ui.parts.DomainEventDispatcher.dispatchMouseReleased(DomainEventDispatcher.java:381)
	at org.eclipse.draw2d.LightweightSystem$EventHandler.mouseUp(LightweightSystem.java:548)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:220)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4425)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3773)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3393)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1122)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1006)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:147)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:630)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:574)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:125)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:133)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:103)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:378)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:232)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	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:1462)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)