Program: 69292
Project: 69292
Buggy source:
/** 
 * @param item the target item for the jumpInLink null if not want to refer to a specific post
 * @return The jump in link
 */
public String getJumpInLink(Item item){
  String jumpInLink=null;
  RepositoryManager resMgr=RepositoryManager.getInstance();
  if (courseId != null && nodeId != null) {
    OLATResourceable oresCourse=OLATResourceManager.getInstance().findResourceable(courseId,CourseModule.getCourseTypeName());
    OLATResourceable oresNode=OresHelper.createOLATResourceableInstance("String_Node_Str",Long.valueOf(nodeId));
    RepositoryEntry repositoryEntry=resMgr.lookupRepositoryEntry(oresCourse,false);
    List<ContextEntry> ces=new ArrayList<>();
    ces.add(BusinessControlFactory.getInstance().createContextEntry(repositoryEntry));
    ces.add(BusinessControlFactory.getInstance().createContextEntry(oresNode));
    jumpInLink=BusinessControlFactory.getInstance().getAsURIString(ces,false);
  }
 else {
    RepositoryEntry repositoryEntry=resMgr.lookupRepositoryEntry(helperFeed,false);
    if (repositoryEntry != null) {
      ContextEntry ce=BusinessControlFactory.getInstance().createContextEntry(repositoryEntry);
      jumpInLink=BusinessControlFactory.getInstance().getAsURIString(Collections.singletonList(ce),false);
    }
 else {
      final BusinessControlFactory bCF=BusinessControlFactory.getInstance();
      String feedBP=LiveBlogArtefactHandler.LIVEBLOG + helperFeed.getResourceableId() + "String_Node_Str";
      final List<ContextEntry> ceList=bCF.createCEListFromString(feedBP);
      jumpInLink=bCF.getAsURIString(ceList,true);
    }
  }
  if (item != null && jumpInLink != null) {
    jumpInLink+="String_Node_Str" + item.getKey() + "String_Node_Str";
  }
  return jumpInLink;
}

Fixed version (ground truth):
/** 
 * @param item the target item for the jumpInLink null if not want to refer to a specific post
 * @return The jump in link
 */
public String getJumpInLink(Item item){
  String jumpInLink=null;
  RepositoryManager resMgr=RepositoryManager.getInstance();
  if (courseId != null && nodeId != null) {
    OLATResourceable oresCourse=OLATResourceManager.getInstance().findResourceable(courseId,CourseModule.getCourseTypeName());
    OLATResourceable oresNode=OresHelper.createOLATResourceableInstance("String_Node_Str",Long.valueOf(nodeId));
    RepositoryEntry repositoryEntry=resMgr.lookupRepositoryEntry(oresCourse,false);
    List<ContextEntry> ces=new ArrayList<>();
    ces.add(BusinessControlFactory.getInstance().createContextEntry(repositoryEntry));
    ces.add(BusinessControlFactory.getInstance().createContextEntry(oresNode));
    jumpInLink=BusinessControlFactory.getInstance().getAsURIString(ces,false);
  }
 else {
    RepositoryEntry repositoryEntry=resMgr.lookupRepositoryEntry(item.getFeed(),false);
    if (repositoryEntry != null) {
      ContextEntry ce=BusinessControlFactory.getInstance().createContextEntry(repositoryEntry);
      jumpInLink=BusinessControlFactory.getInstance().getAsURIString(Collections.singletonList(ce),false);
    }
 else {
      final BusinessControlFactory bCF=BusinessControlFactory.getInstance();
      String feedBP=LiveBlogArtefactHandler.LIVEBLOG + item.getFeed().getResourceableId() + "String_Node_Str";
      final List<ContextEntry> ceList=bCF.createCEListFromString(feedBP);
      jumpInLink=bCF.getAsURIString(ceList,true);
    }
  }
  if (item != null && jumpInLink != null) {
    jumpInLink+="String_Node_Str" + item.getKey() + "String_Node_Str";
  }
  return jumpInLink;
}