Program: 127777
Project: 127777
Buggy source:
private void convert(org.talend.core.model.general.Project newProject,Container fromModel,RepositoryNode parent,ERepositoryObjectType type,RepositoryNode recBinNode){
  if (parent == null || fromModel == null) {
    return;
  }
  for (  Object obj : fromModel.getSubContainer()) {
    Container container=(Container)obj;
    Folder oFolder=new Folder((Property)container.getProperty(),type);
    if (oFolder.getProperty() == null) {
      continue;
    }
    RepositoryNode folder=null;
    String label=container.getLabel();
    if (label.equals("String_Node_Str") || label.startsWith("String_Node_Str")) {
      continue;
    }
    boolean isJobDocRootFolder=((label.indexOf("String_Node_Str") != -1) && (label.indexOf("String_Node_Str") != -1));
    boolean isPicFolderName=label.equals(IHTMLDocConstants.PIC_FOLDER_NAME);
    if (isJobDocRootFolder || isPicFolderName) {
      continue;
    }
    if (RepositoryConstants.SYSTEM_DIRECTORY.equals(label)) {
      if (getMergeRefProject()) {
        parent.getChildren();
        boolean existSystemFolder=false;
        for (        IRepositoryNode node : parent.getChildren()) {
          if (RepositoryConstants.SYSTEM_DIRECTORY.equalsIgnoreCase(node.getLabel())) {
            existSystemFolder=true;
            break;
          }
        }
        IBrandingService breaningService=(IBrandingService)GlobalServiceRegister.getDefault().getService(IBrandingService.class);
        if (!existSystemFolder && !breaningService.isPoweredOnlyCamel()) {
          folder=new StableRepositoryNode(parent,RepositoryConstants.SYSTEM_DIRECTORY,ECoreImage.FOLDER_CLOSE_ICON);
          parent.getChildren().add(folder);
        }
 else {
          continue;
        }
      }
 else {
        folder=new StableRepositoryNode(parent,RepositoryConstants.SYSTEM_DIRECTORY,ECoreImage.FOLDER_CLOSE_ICON);
        parent.getChildren().add(folder);
      }
    }
 else     if (ERepositoryObjectType.GENERATED.name().equalsIgnoreCase(label)) {
      if (PluginChecker.isDocumentationPluginLoaded()) {
        convertDocumentation(newProject,container,parent,type,recBinNode);
      }
      continue;
    }
 else {
      if (getMergeRefProject()) {
        String a=parent.getProperties(EProperties.LABEL).toString();
        if (type == ERepositoryObjectType.SQLPATTERNS) {
          folder=getSQLPatternNode(a,label);
        }
        if (folder == null) {
          if (newProject != this.project && !hasTalendItems(container)) {
            continue;
          }
          folder=new RepositoryNode(oFolder,parent,ENodeType.SIMPLE_FOLDER);
          if (factory.getStatus(oFolder) != ERepositoryStatus.DELETED) {
            parent.getChildren().add(folder);
          }
        }
      }
 else {
        folder=new RepositoryNode(oFolder,parent,ENodeType.SIMPLE_FOLDER);
        if (factory.getStatus(oFolder) != ERepositoryStatus.DELETED) {
          parent.getChildren().add(folder);
        }
      }
    }
    folder.setProperties(EProperties.LABEL,label);
    folder.setProperties(EProperties.CONTENT_TYPE,type);
    convert(newProject,container,folder,type,recBinNode);
  }
  for (  Object obj : fromModel.getMembers()) {
    IRepositoryViewObject repositoryObject=(IRepositoryViewObject)obj;
    try {
      if (!repositoryObject.isDeleted()) {
        addNode(parent,type,recBinNode,repositoryObject);
      }
    }
 catch (    Exception e) {
      ExceptionHandler.log(Messages.getString("String_Node_Str",repositoryObject.getRepositoryObjectType(),repositoryObject.getLabel()));
      if (repositoryObject.getProperty() != null && repositoryObject.getProperty().getInformations().isEmpty()) {
        Information info=PropertiesFactory.eINSTANCE.createInformation();
        info.setLevel(InformationLevel.ERROR_LITERAL);
        info.setText(Messages.getString("String_Node_Str"));
        Property property=repositoryObject.getProperty();
        property.getInformations().add(info);
        try {
          factory.save(project,property);
        }
 catch (        PersistenceException e1) {
          ExceptionHandler.process(e1);
        }
        repositoryObject.getProperty();
      }
    }
  }
}

Fixed version (ground truth):
private void convert(org.talend.core.model.general.Project newProject,Container fromModel,RepositoryNode parent,ERepositoryObjectType type,RepositoryNode recBinNode){
  if (parent == null || fromModel == null) {
    return;
  }
  if ((ERepositoryObjectType.DOCUMENTATION).equals(type)) {
    handleDelFolderItems(newProject,parent);
  }
  for (  Object obj : fromModel.getSubContainer()) {
    Container container=(Container)obj;
    Folder oFolder=new Folder((Property)container.getProperty(),type);
    boolean found=false;
    if (ERepositoryObjectType.JOB_DOC.equals(type) || ERepositoryObjectType.JOBLET_DOC.equals(type)) {
      for (      FolderItem delFolder : delFolderItems) {
        String parentName=((FolderItem)delFolder.getParent()).getProperty().getLabel();
        String oFolderPath=oFolder.getPath();
        String jobPath="String_Node_Str" + delFolder.getState().getPath();
        String jobPath1="String_Node_Str" + delFolder.getState().getPath();
        String jobletPath="String_Node_Str" + delFolder.getState().getPath();
        String jobletPath1="String_Node_Str" + delFolder.getState().getPath();
        if (oFolder.getLabel().equals(delFolder.getProperty().getLabel())) {
          if ("String_Node_Str".equals(parentName) && oFolderPath.equals(jobPath)) {
            found=true;
          }
 else           if ("String_Node_Str".equals(parentName) && oFolderPath.equals(jobletPath)) {
            found=true;
          }
 else           if (oFolderPath.equals(jobPath1) || oFolderPath.equals(jobletPath1)) {
            found=true;
          }
          break;
        }
      }
    }
    if (found) {
      continue;
    }
    if (oFolder.getProperty() == null) {
      continue;
    }
    RepositoryNode folder=null;
    String label=container.getLabel();
    if (label.equals("String_Node_Str") || label.startsWith("String_Node_Str")) {
      continue;
    }
    boolean isJobDocRootFolder=((label.indexOf("String_Node_Str") != -1) && (label.indexOf("String_Node_Str") != -1));
    boolean isPicFolderName=label.equals(IHTMLDocConstants.PIC_FOLDER_NAME);
    if (isJobDocRootFolder || isPicFolderName) {
      continue;
    }
    if (RepositoryConstants.SYSTEM_DIRECTORY.equals(label)) {
      if (getMergeRefProject()) {
        parent.getChildren();
        boolean existSystemFolder=false;
        for (        IRepositoryNode node : parent.getChildren()) {
          if (RepositoryConstants.SYSTEM_DIRECTORY.equalsIgnoreCase(node.getLabel())) {
            existSystemFolder=true;
            break;
          }
        }
        IBrandingService breaningService=(IBrandingService)GlobalServiceRegister.getDefault().getService(IBrandingService.class);
        if (!existSystemFolder && !breaningService.isPoweredOnlyCamel()) {
          folder=new StableRepositoryNode(parent,RepositoryConstants.SYSTEM_DIRECTORY,ECoreImage.FOLDER_CLOSE_ICON);
          parent.getChildren().add(folder);
        }
 else {
          continue;
        }
      }
 else {
        folder=new StableRepositoryNode(parent,RepositoryConstants.SYSTEM_DIRECTORY,ECoreImage.FOLDER_CLOSE_ICON);
        parent.getChildren().add(folder);
      }
    }
 else     if (ERepositoryObjectType.GENERATED.name().equalsIgnoreCase(label)) {
      if (PluginChecker.isDocumentationPluginLoaded()) {
        convertDocumentation(newProject,container,parent,type,recBinNode);
      }
      continue;
    }
 else {
      if (getMergeRefProject()) {
        String a=parent.getProperties(EProperties.LABEL).toString();
        if (type == ERepositoryObjectType.SQLPATTERNS) {
          folder=getSQLPatternNode(a,label);
        }
        if (folder == null) {
          if (newProject != this.project && !hasTalendItems(container)) {
            continue;
          }
          folder=new RepositoryNode(oFolder,parent,ENodeType.SIMPLE_FOLDER);
          if (factory.getStatus(oFolder) != ERepositoryStatus.DELETED) {
            parent.getChildren().add(folder);
          }
        }
      }
 else {
        folder=new RepositoryNode(oFolder,parent,ENodeType.SIMPLE_FOLDER);
        if (factory.getStatus(oFolder) != ERepositoryStatus.DELETED) {
          parent.getChildren().add(folder);
        }
      }
    }
    folder.setProperties(EProperties.LABEL,label);
    folder.setProperties(EProperties.CONTENT_TYPE,type);
    convert(newProject,container,folder,type,recBinNode);
  }
  for (  Object obj : fromModel.getMembers()) {
    IRepositoryViewObject repositoryObject=(IRepositoryViewObject)obj;
    try {
      if (!repositoryObject.isDeleted()) {
        addNode(parent,type,recBinNode,repositoryObject);
      }
    }
 catch (    Exception e) {
      ExceptionHandler.log(Messages.getString("String_Node_Str",repositoryObject.getRepositoryObjectType(),repositoryObject.getLabel()));
      if (repositoryObject.getProperty() != null && repositoryObject.getProperty().getInformations().isEmpty()) {
        Information info=PropertiesFactory.eINSTANCE.createInformation();
        info.setLevel(InformationLevel.ERROR_LITERAL);
        info.setText(Messages.getString("String_Node_Str"));
        Property property=repositoryObject.getProperty();
        property.getInformations().add(info);
        try {
          factory.save(project,property);
        }
 catch (        PersistenceException e1) {
          ExceptionHandler.process(e1);
        }
        repositoryObject.getProperty();
      }
    }
  }
}