#fixed code
                                @Override
    public LookbackQuery withIntervals(Collection<Interval> intervals) {
        return withDataSource(new QueryDataSource(getInnerQueryUnchecked().withIntervals(intervals)));
    }
#vulnerable code 
                                @Override
    public LookbackQuery withIntervals(Collection<Interval> intervals) {
        return withDataSource(new QueryDataSource(getInnerQuery().withIntervals(intervals)));
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE