Bug 300032 [Markers] NPE in MarkerFieldFilterGroup.selectByScope
I20100115-1100 I had a Java editor open and dirty. The Problems view was NOT visible (topmost in that view stack was Progress). I pressed 'Alt+Shift+W, P, Return' to reveal the file in the Package Explorer. The stored file had no compile problems, but the the working copy in the editor had a problem which I fixed shortly before I started the Show In action. java.lang.NullPointerException at org.eclipse.ui.internal.views.markers.MarkerFieldFilterGroup.selectByScope(MarkerFieldFilterGroup.java:693) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.select(MarkerContentGenerator.java:781) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.internalGatherMarkers(MarkerContentGenerator.java:1073) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.gatherMarkers(MarkerContentGenerator.java:1013) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.generateMarkerEntries(MarkerContentGenerator.java:991) at org.eclipse.ui.internal.views.markers.MarkerUpdateJob.clean(MarkerUpdateJob.java:117) at org.eclipse.ui.internal.views.markers.MarkerUpdateJob.buildMarkers(MarkerUpdateJob.java:77) at org.eclipse.ui.internal.views.markers.MarkerUpdateJob.run(MarkerUpdateJob.java:57) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
requestMarkerUpdate();
			
		}
	}
	/**
	 * Return whether or not the list contains a resource that will require
	 * update.
	 * 
	 * @return boolean <code>true</code> if update is required.
	 */
	boolean updateNeededForSelection(Object[] newElements) {
		Iterator filters = getEnabledFilters().iterator();
		while (filters.hasNext()) {
			MarkerFieldFilterGroup filter = (MarkerFieldFilterGroup) filters
					.next();
			int scope = filter.getScope();
			if (scope == MarkerFieldFilterGroup.ON_ANY
					|| scope == MarkerFieldFilterGroup.ON_WORKING_SET)
				continue;
			if (newElements == null || newElements.length < 1)
				continue;
			if (selectedResources.length == 0)
				return true; 
			if (Arrays.equals(selectedResources, newElements))
				continue;
			if (scope == MarkerFieldFilterGroup.ON_ANY_IN_SAME_CONTAINER) {
				Collection oldProjects = MarkerResourceUtil
						.getProjectsAsCollection(selectedResources);
				Collection newProjects = MarkerResourceUtil