Bug 30581 NPE in organize Import
Found the following in the log of PR 30427 java.lang.NullPointerException at org.eclipse.jdt.ui.actions.OrganizeImportsAction.doChooseImports (OrganizeImportsAction.java:400) at org.eclipse.jdt.ui.actions.OrganizeImportsAction.access$1 (OrganizeImportsAction.java:398) at org.eclipse.jdt.ui.actions.OrganizeImportsAction$3.chooseImports (OrganizeImportsAction.java:393) at org.eclipse.jdt.internal.corext.codemanipulation.OrganizeImportsOperation.run (OrganizeImportsOperation.java:546) at org.eclipse.jdt.internal.core.BatchOperation.executeOperation (BatchOperation.java:34) at org.eclipse.jdt.internal.core.JavaModelOperation.execute (JavaModelOperation.java:326) at org.eclipse.jdt.internal.core.JavaModelOperation.run (JavaModelOperation.java:626) at org.eclipse.core.internal.resources.Workspace.run (Workspace.java:1564) at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:2571) at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run (WorkbenchRunnableAdapter.java:32) at org.eclipse.jdt.internal.ui.util.BusyIndicatorRunnableContext$BusyRunnable.inter nalRun(BusyIndicatorRunnableContext.java:107) at org.eclipse.jdt.internal.ui.util.BusyIndicatorRunnableContext$BusyRunnable.run (BusyIndicatorRunnableContext.java:74) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:65) at org.eclipse.jdt.internal.ui.util.BusyIndicatorRunnableContext.run (BusyIndicatorRunnableContext.java:120) at org.eclipse.jdt.ui.actions.OrganizeImportsAction.runOnSingle (OrganizeImportsAction.java:361) at org.eclipse.jdt.ui.actions.OrganizeImportsAction.run (OrganizeImportsAction.java:252) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun (SelectionDispatchAction.java:191) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run (SelectionDispatchAction.java:169) at org.eclipse.jface.action.Action.runWithEvent(Action.java:769) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection (ActionContributionItem.java:411) at org.eclipse.jface.action.ActionContributionItem.handleWidgetEvent (ActionContributionItem.java:365) at org.eclipse.jface.action.ActionContributionItem.access$0 (ActionContributionItem.java:356) at org.eclipse.jface.action.ActionContributionItem$ActionListener.handleEvent (ActionContributionItem.java:48) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:77) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:855) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:1825) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1616) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1446) at org.eclipse.ui.internal.Workbench.run(Workbench.java:1429) at org.eclipse.core.internal.boot.InternalBootLoader.run (InternalBootLoader.java:845) at org.eclipse.core.boot.BootLoader.run(BootLoader.java:462) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.eclipse.core.launcher.Main.basicRun(Main.java:247) at org.eclipse.core.launcher.Main.run(Main.java:703) at org.eclipse.core.launcher.Main.main(Main.java:539)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/OrganizeImportsAction.java
}		
		
	}
	
	static final class OrganizeImportError extends Error {
	}
	
	private void doRunOnMultiple(ICompilationUnit[] cus, MultiStatus status, IProgressMonitor monitor) throws OperationCanceledException {
		if (monitor == null) {
			monitor= new NullProgressMonitor();
		}	
	
		monitor.beginTask(ActionMessages.getString("OrganizeImportsAction.multi.op.description"), cus.length); 
		try {
			IPreferenceStore store= PreferenceConstants.getPreferenceStore();
			String[] prefOrder= JavaPreferencesSettings.getImportOrderPreference(store);
			int threshold= JavaPreferencesSettings.getImportNumberThreshold(store);
			boolean ignoreLowerCaseNames= store.getBoolean(PreferenceConstants.ORGIMPORTS_IGNORELOWERCASE);
	
			IChooseImportQuery query= new IChooseImportQuery() {
				public TypeInfo[] chooseImports(TypeInfo[][] openChoices, ISourceRange[] ranges) {
					throw new OrganizeImportError();
				}
			};
	
			for (int i= 0; i < cus.length; i++) {
				ICompilationUnit cu= cus[i];
				String cuLocation= cu.getPath().makeRelative().toString();