output: #fixed code
                                  @Override
      public Environment setUpEnvironment(@SuppressWarnings("rawtypes") AbstractBuild build, Launcher launcher, BuildListener listener) throws IOException, InterruptedException, Run.RunnerAbortedException {
          GhprbTrigger trigger = Ghprb.extractTrigger(build);
          if (trigger != null && trigger.getBuilds() != null) {
              trigger.getBuilds().onEnvironmentSetup(build, launcher, listener);
          }
  
          return new hudson.model.Environment(){};
      }
input: #vulnerable code 
                                  @Override
      public Environment setUpEnvironment(@SuppressWarnings("rawtypes") AbstractBuild build, Launcher launcher, BuildListener listener) throws IOException, InterruptedException, Run.RunnerAbortedException {
          GhprbTrigger trigger = Ghprb.extractTrigger(build);
          if (trigger != null) {
              trigger.getBuilds().onEnvironmentSetup(build, launcher, listener);
          }
  
          return new hudson.model.Environment(){};
      } 
                              #location 5 
                              #vulnerability type NULL_DEREFERENCE