output: #fixed code
                                  public QueueTaskFuture<?> startJob(GhprbCause cause, GhprbRepository repo) {
          
  
          for (GhprbExtension ext : Ghprb.getJobExtensions(this, GhprbBuildStep.class)) {
              if (ext instanceof GhprbBuildStep) {
                  ((GhprbBuildStep)ext).onStartBuild(super.job, cause);
              }
          }
          
          ArrayList<ParameterValue> values = getDefaultParameters();
          final String commitSha = cause.isMerged() ? "origin/pr/" + cause.getPullID() + "/merge" : cause.getCommit();
          values.add(new StringParameterValue("sha1", commitSha));
          values.add(new StringParameterValue("ghprbActualCommit", cause.getCommit()));
          String triggerAuthor = "";
          String triggerAuthorEmail = "";
          String triggerAuthorLogin = "";
          
          GhprbPullRequest pr = getRepository().getPullRequest(cause.getPullID());
          String lastBuildId = pr.getLastBuildId();
          BuildData buildData = null;
          if (!(job instanceof MatrixProject) && !StringUtils.isEmpty(lastBuildId)) {
              AbstractBuild<?, ?> lastBuild = job.getBuild(lastBuildId);
              buildData = lastBuild.getAction(BuildData.class);
          }
  
          try {
              triggerAuthor = getString(cause.getTriggerSender().getName(), "");
          } catch (Exception e) {}
          try {
              triggerAuthorEmail = getString(cause.getTriggerSender().getEmail(), "");
          } catch (Exception e) {}
          try {
              triggerAuthorLogin = getString(cause.getTriggerSender().getLogin(), "");
          } catch (Exception e) {}
  
          setCommitAuthor(cause, values);
          values.add(new StringParameterValue("ghprbAuthorRepoGitUrl", getString(cause.getAuthorRepoGitUrl(), "")));
  
          values.add(new StringParameterValue("ghprbTriggerAuthor", triggerAuthor));
          values.add(new StringParameterValue("ghprbTriggerAuthorEmail", triggerAuthorEmail));
          values.add(new StringParameterValue("ghprbTriggerAuthorLogin", triggerAuthorLogin));
          values.add(new StringParameterValue("ghprbTriggerAuthorLoginMention", !triggerAuthorLogin.isEmpty() ? "@"
                  + triggerAuthorLogin : ""));
          final StringParameterValue pullIdPv = new StringParameterValue("ghprbPullId", String.valueOf(cause.getPullID()));
          values.add(pullIdPv);
          values.add(new StringParameterValue("ghprbTargetBranch", String.valueOf(cause.getTargetBranch())));
          values.add(new StringParameterValue("ghprbSourceBranch", String.valueOf(cause.getSourceBranch())));
          values.add(new StringParameterValue("GIT_BRANCH", String.valueOf(cause.getSourceBranch())));
          
          // it's possible the GHUser doesn't have an associated email address
          values.add(new StringParameterValue("ghprbPullAuthorEmail", getString(cause.getAuthorEmail(), "")));
          values.add(new StringParameterValue("ghprbPullAuthorLogin", String.valueOf(cause.getPullRequestAuthor().getLogin())));
          values.add(new StringParameterValue("ghprbPullAuthorLoginMention", "@" + cause.getPullRequestAuthor().getLogin()));
          
          values.add(new StringParameterValue("ghprbPullDescription", escapeText(String.valueOf(cause.getShortDescription()))));
          values.add(new StringParameterValue("ghprbPullTitle", String.valueOf(cause.getTitle())));
          values.add(new StringParameterValue("ghprbPullLink", String.valueOf(cause.getUrl())));
          values.add(new StringParameterValue("ghprbPullLongDescription", escapeText(String.valueOf(cause.getDescription()))));
          
          values.add(new StringParameterValue("ghprbCommentBody", escapeText(String.valueOf(cause.getCommentBody()))));
          
          values.add(new StringParameterValue("ghprbGhRepository", repo.getName()));
          values.add(new StringParameterValue("ghprbCredentialsId", getString(getGitHubApiAuth().getCredentialsId(), "")));
          
          
  
          // add the previous pr BuildData as an action so that the correct change log is generated by the GitSCM plugin
          // note that this will be removed from the Actions list after the job is completed so that the old (and incorrect)
          // one isn't there
          return this.job.scheduleBuild2(job.getQuietPeriod(), cause, new ParametersAction(values), buildData);
      }
input: #vulnerable code 
                                  public QueueTaskFuture<?> startJob(GhprbCause cause, GhprbRepository repo) {
          ArrayList<ParameterValue> values = getDefaultParameters();
          final String commitSha = cause.isMerged() ? "origin/pr/" + cause.getPullID() + "/merge" : cause.getCommit();
          values.add(new StringParameterValue("sha1", commitSha));
          values.add(new StringParameterValue("ghprbActualCommit", cause.getCommit()));
          String triggerAuthor = "";
          String triggerAuthorEmail = "";
          String triggerAuthorLogin = "";
          
          GhprbPullRequest pr = getRepository().getPullRequest(cause.getPullID());
          String lastBuildId = pr.getLastBuildId();
          BuildData buildData = null;
          if (!(job instanceof MatrixProject) && !StringUtils.isEmpty(lastBuildId)) {
              AbstractBuild<?, ?> lastBuild = job.getBuild(lastBuildId);
              buildData = lastBuild.getAction(BuildData.class);
          }
  
          try {
              triggerAuthor = getString(cause.getTriggerSender().getName(), "");
          } catch (Exception e) {}
          try {
              triggerAuthorEmail = getString(cause.getTriggerSender().getEmail(), "");
          } catch (Exception e) {}
          try {
              triggerAuthorLogin = getString(cause.getTriggerSender().getLogin(), "");
          } catch (Exception e) {}
  
          setCommitAuthor(cause, values);
          values.add(new StringParameterValue("ghprbAuthorRepoGitUrl", getString(cause.getAuthorRepoGitUrl(), "")));
  
          values.add(new StringParameterValue("ghprbTriggerAuthor", triggerAuthor));
          values.add(new StringParameterValue("ghprbTriggerAuthorEmail", triggerAuthorEmail));
          values.add(new StringParameterValue("ghprbTriggerAuthorLogin", triggerAuthorLogin));
          values.add(new StringParameterValue("ghprbTriggerAuthorLoginMention", !triggerAuthorLogin.isEmpty() ? "@"
                  + triggerAuthorLogin : ""));
          final StringParameterValue pullIdPv = new StringParameterValue("ghprbPullId", String.valueOf(cause.getPullID()));
          values.add(pullIdPv);
          values.add(new StringParameterValue("ghprbTargetBranch", String.valueOf(cause.getTargetBranch())));
          values.add(new StringParameterValue("ghprbSourceBranch", String.valueOf(cause.getSourceBranch())));
          values.add(new StringParameterValue("GIT_BRANCH", String.valueOf(cause.getSourceBranch())));
          
          // it's possible the GHUser doesn't have an associated email address
          values.add(new StringParameterValue("ghprbPullAuthorEmail", getString(cause.getAuthorEmail(), "")));
          values.add(new StringParameterValue("ghprbPullAuthorLogin", String.valueOf(cause.getPullRequestAuthor().getLogin())));
          values.add(new StringParameterValue("ghprbPullAuthorLoginMention", "@" + cause.getPullRequestAuthor().getLogin()));
          
          values.add(new StringParameterValue("ghprbPullDescription", escapeText(String.valueOf(cause.getShortDescription()))));
          values.add(new StringParameterValue("ghprbPullTitle", String.valueOf(cause.getTitle())));
          values.add(new StringParameterValue("ghprbPullLink", String.valueOf(cause.getUrl())));
          values.add(new StringParameterValue("ghprbPullLongDescription", escapeText(String.valueOf(cause.getDescription()))));
          
          values.add(new StringParameterValue("ghprbCommentBody", escapeText(String.valueOf(cause.getCommentBody()))));
          
          values.add(new StringParameterValue("ghprbGhRepository", repo.getName()));
          values.add(new StringParameterValue("ghprbCredentialsId", getString(getGitHubApiAuth().getCredentialsId(), "")));
          
          
  
          // add the previous pr BuildData as an action so that the correct change log is generated by the GitSCM plugin
          // note that this will be removed from the Actions list after the job is completed so that the old (and incorrect)
          // one isn't there
          return this.job.scheduleBuild2(job.getQuietPeriod(), cause, new ParametersAction(values), buildData);
      } 
                              #location 10 
                              #vulnerability type NULL_DEREFERENCE