Bug 310908 [Markers] NPE thrown by markers job
I20100426-0852 I had one editor open in my window. It was maximized and opened on an external file. When I closed it, this NPE suddenly appeared. java.lang.NullPointerException at org.eclipse.ui.internal.views.markers.MarkerFieldFilterGroup.loadSettings(MarkerFieldFilterGroup.java:448) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.loadGroupWithID(MarkerContentGenerator.java:521) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.loadFilterSettings(MarkerContentGenerator.java:449) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.loadFiltersFrom(MarkerContentGenerator.java:467) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.loadFiltersPreference(MarkerContentGenerator.java:479) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.getAllFilters(MarkerContentGenerator.java:293) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.getEnabledFilters(MarkerContentGenerator.java:307) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.getResourcesForBuild(MarkerContentGenerator.java:904) at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.gatherMarkers(MarkerContentGenerator.java:1004) 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:54)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerFieldFilterGroup.java
}
	/**
	 * Get the root types for the receiver
	 * 
	 * @return Collection of {@link MarkerType}
	 */
	Collection getAllTypes() {
		return generator.getMarkerTypes();
	}
	/**
	 * Get the filters registered on the receiver.
	 * 
	 * @return MarkerFieldFilter[]
	 */
	private MarkerFieldFilter[] getFieldFilters() {
		if (fieldFilters == null) {
			calculateFilters();
		}
		return fieldFilters;
	}
	/**
	 * Calculate the filters for the receiver.
	 */
	protected void calculateFilters() {
		Map values = getValues();
		Collection filters = new ArrayList();
		MarkerField[] fields = generator.getVisibleFields();
		for (int i = 0; i < fields.length; i++) {
			MarkerFieldFilter fieldFilter = MarkerSupportInternalUtilities
					.generateFilter(fields[i]);