output: #fixed code
                               private static final Collection<MapArea> createAreasForSimpleMultipolygon(OsmRelation relation,
  			TLongObjectMap<MapNode> nodeIdMap, OsmEntityProvider db) throws EntityNotFoundException {
  
  		assert isSimpleMultipolygon(relation, db);
  
  		OsmEntity tagSource = null;
  		List<MapNode> outerNodes = null;
  		List<List<MapNode>> holes = new ArrayList<List<MapNode>>();
  
  		for (OsmRelationMember member : membersAsList(relation)) {
  			if (member.getType() == EntityType.Way) {
  
  				OsmWay way = db.getWay(member.getId());
  
  				if ("inner".equals(member.getRole())) {
  
  					List<MapNode> hole = new ArrayList<MapNode>(way.getNumberOfNodes());
  
  					for (long nodeId : nodesAsList(way).toArray()) {
  						hole.add(nodeIdMap.get(nodeId));
  					}
  
  					holes.add(hole);
  
  				} else if ("outer".equals(member.getRole())) {
  
  					tagSource = relation.getNumberOfTags() > 1 ? relation : way;
  
  					outerNodes = new ArrayList<MapNode>(way.getNumberOfNodes());
  					for (long nodeId : nodesAsList(way).toArray()) {
  						outerNodes.add(nodeIdMap.get(nodeId));
  					}
  
  				}
  
  			}
  		}
  
  		return singleton(new MapArea(tagSource.getId(), tagSource instanceof OsmRelation,
  				OSMToMapDataConverter.tagsOfEntity(tagSource), outerNodes, holes));
  
  	}
input: #vulnerable code 
                               private static final Collection<MapArea> createAreasForSimpleMultipolygon(OsmRelation relation,
  			TLongObjectMap<MapNode> nodeIdMap, OsmEntityProvider db) throws EntityNotFoundException {
  
  		assert isSimpleMultipolygon(relation, db);
  
  		OsmEntity tagSource = null;
  		List<MapNode> outerNodes = null;
  		List<List<MapNode>> holes = new ArrayList<List<MapNode>>();
  
  		for (OsmRelationMember member : membersAsList(relation)) {
  			if (member.getType() == EntityType.Way) {
  
  				OsmWay way = db.getWay(member.getId());
  
  				if ("inner".equals(member.getRole())) {
  
  					List<MapNode> hole = new ArrayList<MapNode>(way.getNumberOfNodes());
  
  					for (long nodeId : nodesAsList(way).toArray()) {
  						hole.add(nodeIdMap.get(nodeId));
  					}
  
  					holes.add(hole);
  
  				} else if ("outer".equals(member.getRole())) {
  
  					tagSource = relation.getNumberOfTags() > 1 ? relation : way;
  
  					outerNodes = new ArrayList<MapNode>(way.getNumberOfNodes());
  					for (long nodeId : nodesAsList(way).toArray()) {
  						outerNodes.add(nodeIdMap.get(nodeId));
  					}
  
  				}
  
  			}
  		}
  
  		return singleton(new MapArea(tagSource, outerNodes, holes));
  
  	} 
                              #location 39 
                              #vulnerability type NULL_DEREFERENCE