#vulnerable code 
                                private static Set<Annotation> parameterAnnotations(Member member) {
        Set<Annotation> result = new HashSet<>();
        Annotation[][] annotations =
                member instanceof Method ? ((Method) member).getParameterAnnotations() :
                member instanceof Constructor ? ((Constructor) member).getParameterAnnotations() : null;
        for (Annotation[] annotation : annotations) Collections.addAll(result, annotation);
        return result;
    } 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private static Set<Annotation> parameterAnnotations(Member member) {
        Annotation[][] annotations =
                member instanceof Method ? ((Method) member).getParameterAnnotations() :
                member instanceof Constructor ? ((Constructor) member).getParameterAnnotations() : null;
        return Arrays.stream(annotations).flatMap(Arrays::stream).collect(Collectors.toSet());
    }