Bug 67716 [ProblemsView] Trying to sort in Problems View removes all items from view
Configure the problems view to display "selected resource and it children". Open a file with a couple of warnings. Sort by any of the columns in the table. All table items are removed and the view is displaying ZERO hits.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
clipboard = new Clipboard(parent.getDisplay());
		super.createPartControl(parent);
		initDragAndDrop();
		getSite().getPage().addSelectionListener(focusListener);
		focusSelectionChanged(getSite().getPage().getActivePart(), 
				getSite().getPage().getSelection());
		ResourcesPlugin.getWorkspace().addResourceChangeListener(resourceListener);
		refresh();
		
		
		getViewer().getControl().addHelpListener(new HelpListener() {
			/*
			 *  (non-Javadoc)
			 * @see org.eclipse.swt.events.HelpListener#helpRequested(org.eclipse.swt.events.HelpEvent)
			 */
			public void helpRequested(HelpEvent e) {
				String contextId = null;
				
				ConcreteMarker marker =
					(ConcreteMarker) ((IStructuredSelection) getViewer().getSelection())
						.getFirstElement();
				if (marker != null) {
					contextId = IDE.getMarkerHelpRegistry().getHelp(marker.getMarker());
				}
				if (contextId == null) {
					contextId = PlatformUI.PLUGIN_ID + ".task_list_view_context";
				}
				WorkbenchHelp.displayHelp(contextId);
			}
		});