Bug 176441 [Markers] NPE while refreshing the problem view
I got this exception using I20070228-0930. No steps to reproduce. It seems to happen when refreshing the problem view. java.lang.NullPointerException at org.eclipse.ui.views.markers.internal.MarkerAdapter.buildAllMarkers(MarkerAdapter.java:251) at org.eclipse.ui.views.markers.internal.MarkerView.updateForContentsRefresh(MarkerView.java:570) at org.eclipse.ui.views.markers.internal.MarkerView$MarkerProcessJob.run(MarkerView.java:151) 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
*/
	protected Collection findEnabledFilters() {
		MarkerFilter[] allFilters = getAllFilters();
		ArrayList filters = new ArrayList(0);
		for (int i = 0; i < allFilters.length; i++) {
			if (allFilters[i].isEnabled()) {
				filters.add(allFilters[i]);
			}
		}
		return filters;
	}
	/**
	 * 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();