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
/**
	 * Get all of the filters applied to the receiver.
	 * 
	 * @return MarkerFilter[]
	 */
	MarkerFilter[] getAllFilters() {
		return getUserFilters();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.views.markers.internal.TableView#addDropDownContributions(org.eclipse.jface.action.IMenuManager)
	 */
	void addDropDownContributions(IMenuManager menu) {
		super.addDropDownContributions(menu);
		menu.add(new Separator(MENU_FILTERS_GROUP));
		
		filtersMenu = new MenuManager(MarkerMessages.filtersSubMenu_title);
		refreshFilterMenu();
		menu.appendToGroup(MENU_FILTERS_GROUP, filtersMenu);
	}
	/**
	 * Create the show in menu if there is a single selection.
	 * 
	 * @param menu
	 */
	void createShowInMenu(IMenuManager menu) {
		ISelection selection = getViewer().getSelection();
		if (!(selection instanceof IStructuredSelection))
			return;