#fixed code
                             public List<Result> fetchNewResults(String algorithmName){
		List<Result> newResults = new LinkedList<Result>();
		
		//newResults.add(currentResultReceivers.get(algorithmName).getNewResults());
		newResults.add(new UniqueColumnCombination(new ColumnIdentifier("table", "col1")));
		
		return newResults;
	}
#vulnerable code 
                             public List<Result> fetchNewResults(String algorithmName){
		List<Result> newResults = new LinkedList<Result>();
		
		for (ResultPrinter printer : currentResultPrinters.get(algorithmName)) {
//			newResults.addAll(printer.getNewResults());
		}
		newResults.add(new UniqueColumnCombination(new ColumnIdentifier("table", "col1")));
		
		return newResults;
	} 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE