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java.lang.NullPointerException: 	at org.eclipse.ui.internal.Workbench.createWorkbenchWindow(Workbench.java:1376)	at org.eclipse.ui.internal.Workbench.getActiveWorkbenchWindow(Workbench.java:1369)	at org.eclipse.cdt.codan.internal.ui.cxx.Startup$1.run(Startup.java:39)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4145)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762)	at org.eclipse.swt.widgets.Display.release(Display.java:3815)	at org.eclipse.swt.graphics.Device.dispose(Device.java:295)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:140)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)	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:636)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)	at org.eclipse.equinox.launcher.Main.run(Main.java:1450)