output: #fixed code
                                private void run(final Class<?> clazz, final Class<?> test,
        final MethodMutatorFactory... mutators) {
  
      final ReportOptions data = new ReportOptions();
  
      final Set<Predicate<String>> tests = Collections.singleton(Prelude
          .isEqualTo(test.getName()));
      data.setTargetTests(tests);
      data.setDependencyAnalysisMaxDistance(-1);
  
      final Set<Predicate<String>> mutees = Collections.singleton(Prelude
          .isEqualTo(clazz.getName()));
      data.setTargetClasses(mutees);
  
      data.setTimeoutConstant(PercentAndConstantTimeoutStrategy.DEFAULT_CONSTANT);
      data.setTimeoutFactor(PercentAndConstantTimeoutStrategy.DEFAULT_FACTOR);
  
      final ArrayList<Predicate<String>> inScope = new ArrayList<Predicate<String>>();
      inScope.addAll(mutees);
      inScope.addAll(tests);
  
      data.setClassesInScope(inScope);
  
      final JavaAgent agent = new JarCreatingJarFinder();
  
      try {
        createEngineAndRun(data, agent, mutators);
      } finally {
        agent.close();
      }
    }
input: #vulnerable code 
                                private void run(final Class<?> clazz, final Class<?> test,
        final MethodMutatorFactory... mutators) {
  
      final ReportOptions data = new ReportOptions();
  
      final Set<Predicate<String>> tests = Collections.singleton(Prelude
          .isEqualTo(test.getName()));
      data.setTargetTests(tests);
      data.setDependencyAnalysisMaxDistance(-1);
  
      final Set<Predicate<String>> mutees = Collections.singleton(Prelude
          .isEqualTo(clazz.getName()));
      data.setTargetClasses(mutees);
  
      data.setTimeoutConstant(PercentAndConstantTimeoutStrategy.DEFAULT_CONSTANT);
      data.setTimeoutFactor(PercentAndConstantTimeoutStrategy.DEFAULT_FACTOR);
  
      final ArrayList<Predicate<String>> inScope = new ArrayList<Predicate<String>>();
      inScope.addAll(mutees);
      inScope.addAll(tests);
  
      data.setClassesInScope(inScope);
  
      final CoverageDatabase coverageDatabase = new DefaultCoverageDatabase(
          this.config, new ClassPath(), new JavaAgentJarFinder(), data);
  
      coverageDatabase.initialise();
  
      final Collection<ClassGrouping> codeClasses = coverageDatabase
          .getGroupedClasses();
  
      final MutationEngine engine = DefaultMutationConfigFactory.createEngine(
          false, False.<String> instance(), Collections.<String> emptyList(),
          mutators);
  
      final MutationConfig mutationConfig = new MutationConfig(engine,
          Collections.<String> emptyList());
      final MutationTestBuilder builder = new MutationTestBuilder(mutationConfig,
          UnfilteredMutationFilter.factory(), this.config, data,
          new JavaAgentJarFinder());
  
      final List<TestUnit> tus = builder.createMutationTestUnits(codeClasses,
          this.config, coverageDatabase);
  
      this.pit.run(this.container, tus);
    } 
                              #location 42 
                              #vulnerability type NULL_DEREFERENCE