Bug 120736 [Markers] NPE during: "Fetching children of Problems".
[I20051213-0010, Windows XP] I can only reproduce this in my inner workspace, not in the outer one. It happens when I selected "New Window" and then close the new window immediately. java.lang.NullPointerException at org.eclipse.ui.views.markers.internal.MarkerView.scheduleCountUpdate(MarkerView.java:1432) at org.eclipse.ui.views.markers.internal.MarkerAdapter.fetchDeferredChildren(MarkerAdapter.java:201) at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:192) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:58)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
private static final String TAG_SELECTION = "selection"; 
	private static final String TAG_MARKER = "marker"; 
	private static final String TAG_RESOURCE = "resource"; 
	private static final String TAG_ID = "id"; 
	private static final String TAG_FILTERS_SECTION = "filters"; 
	private static final String TAG_FILTER_ENTRY = "filter"; 
	private static final String MENU_FILTERS_GROUP = "group.filter";
	private static final String MENU_SHOW_IN_GROUP = "group.showIn";
	
	private static final String OLD_FILTER_SECTION = "filter"; 
	private class UpdateJob extends WorkbenchJob {
		boolean buildDone = true;
		private Collection pendingMarkerUpdates = Collections
				.synchronizedSet(new HashSet());
		boolean refreshAll = false;
		UpdateJob() {
			super(MarkerMessages.MarkerView_queueing_updates);
		}
		/**
		 * Refresh the changed list.
		 * 
		 * @param changed