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
} catch (WorkbenchException e) {
			StatusManager.getManager().handle(e.getStatus());
			return;
		}
	}
	/**
	 * Load the user supplied filter
	 * 
	 * @param child
	 */
	private void loadUserFilter(IMemento child) {
		MarkerFieldFilterGroup newGroup = new MarkerFieldFilterGroup(null, this);
		newGroup.loadSettings(child);
		getAllFilters().add(newGroup);
	}
	/**
	 * Restore the pre-3.4 filters.
	 * 
	 * @param memento
	 */
	private void restoreLegacyFilters(IMemento memento) {
		IMemento[] sections = null;
		if (memento != null)
			sections = memento.getChildren(TAG_LEGACY_FILTER_ENTRY);
		for (int i = 0; i < sections.length; i++) {
			IMemento child = sections[i];
			String id = child.getString(IMemento.TAG_ID);
			if (id == null)
				continue;
			loadLegacyFilter(child);