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
* Add group to the enabled filters.
	 * 
	 * @param group
	 */
	void toggleFilter(MarkerFieldFilterGroup group) {
		Collection enabled = getEnabledFilters();
		if (enabled.remove(group)) 
			group.setEnabled(false);
		else {
			group.setEnabled(true);
			enabled.add(group);
		}
		writeFiltersPreference();
		requestMarkerUpdate();
	}
	/**
	 * Update the filters.
	 * 
	 * @param filters
	 * @param andFilters
	 */
	void updateFilters(Collection filters, boolean andFilters) {
		setAndFilters(andFilters);
		this.filters = filters;
		enabledFilters = FILTERS_CHANGED;
		writeFiltersPreference();
		requestMarkerUpdate();
	}
	/**
	 * Set whether the filters are being ANDed or ORed.