Program: 69659
Project: 69659
Buggy source:
public QTI12AssessmentStatisticsController(UserRequest ureq,WindowControl wControl,QTIStatisticResourceResult resourceResult,boolean printMode){
  super(ureq,wControl);
  type=resourceResult.getType();
  this.resourceResult=resourceResult;
  mediaBaseURL=resourceResult.getMediaBaseURL();
  seriesfactory=new SeriesFactory(resourceResult);
  qtiStatisticsManager=CoreSpringFactory.getImpl(QTIStatisticsManager.class);
  mainVC=createVelocityContainer("String_Node_Str");
  mainVC.put("String_Node_Str",new StatisticsComponent("String_Node_Str"));
  mainVC.contextPut("String_Node_Str",new Boolean(printMode));
  downloadRawLink=LinkFactory.createLink("String_Node_Str",mainVC,this);
  downloadRawLink.setCustomEnabledLinkCSS("String_Node_Str");
  mainVC.put("String_Node_Str",downloadRawLink);
  QTICourseNode testNode=resourceResult.getTestCourseNode();
  StatisticAssessment stats=resourceResult.getQTIStatisticAssessment();
  List<Item> items=new ArrayList<>();
  QTIDocument qtiDocument=resourceResult.getQTIDocument();
  for (  Section section : qtiDocument.getAssessment().getSections()) {
    for (    Item item : section.getItems()) {
      items.add(item);
    }
  }
  cutValue=getCutValueSetting(testNode);
  maxScore=getMaxScoreSetting(testNode,items);
  initCourseNodeInformation(stats);
  initDurationHistogram(resourceResult.getQTIStatisticAssessment());
  if (QTIType.test.equals(type)) {
    initScoreHistogram(stats);
    initScoreStatisticPerItem(items,stats.getNumOfParticipants());
  }
 else {
    initItemsOverview(items);
  }
  putInitialPanel(mainVC);
}

Fixed version (ground truth):
public QTI12AssessmentStatisticsController(UserRequest ureq,WindowControl wControl,QTIStatisticResourceResult resourceResult,boolean printMode){
  super(ureq,wControl);
  type=resourceResult.getType();
  this.resourceResult=resourceResult;
  mediaBaseURL=resourceResult.getMediaBaseURL();
  seriesfactory=new SeriesFactory(resourceResult);
  qtiStatisticsManager=CoreSpringFactory.getImpl(QTIStatisticsManager.class);
  courseResourceID=RepositoryManager.getInstance().lookupRepositoryEntryKey(resourceResult.getCourseOres(),false);
  repoEntryId=resourceResult.getQTIRepositoryEntry().getResourceableId();
  mainVC=createVelocityContainer("String_Node_Str");
  mainVC.put("String_Node_Str",new StatisticsComponent("String_Node_Str"));
  mainVC.contextPut("String_Node_Str",new Boolean(printMode));
  downloadRawLink=LinkFactory.createLink("String_Node_Str",mainVC,this);
  downloadRawLink.setCustomEnabledLinkCSS("String_Node_Str");
  mainVC.put("String_Node_Str",downloadRawLink);
  QTICourseNode testNode=resourceResult.getTestCourseNode();
  StatisticAssessment stats=resourceResult.getQTIStatisticAssessment();
  List<Item> items=new ArrayList<>();
  QTIDocument qtiDocument=resourceResult.getQTIDocument();
  for (  Section section : qtiDocument.getAssessment().getSections()) {
    for (    Item item : section.getItems()) {
      items.add(item);
    }
  }
  cutValue=getCutValueSetting(testNode);
  maxScore=getMaxScoreSetting(testNode,items);
  initCourseNodeInformation(stats);
  initDurationHistogram(resourceResult.getQTIStatisticAssessment());
  if (QTIType.test.equals(type)) {
    initScoreHistogram(stats);
    initScoreStatisticPerItem(items,stats.getNumOfParticipants());
  }
 else {
    initItemsOverview(items);
  }
  putInitialPanel(mainVC);
}