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/ProblemView.java
return category;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.views.markers.internal.MarkerView#canBeEditable()
	 */
	boolean canBeEditable() {
		return false;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.views.markers.internal.MarkerView#initToolBar(org.eclipse.jface.action.IToolBarManager)
	 */
	protected void initToolBar(IToolBarManager tbm) {
		tbm.add(getFilterAction());
		tbm.update(false);
	}
	/**
	 * Select the category for the receiver.
	 * 
	 * @param description
	 * @param sorter -
	 *            the sorter to select for
	 */
	public void selectCategory(String description, CategoryComparator sorter) {
		if (description == null)
			selectCategoryField(null, sorter);
		Iterator definedGroups = MarkerSupportRegistry.getInstance()