Program: 137063
Project: 137063
Buggy source:
public CsvArray preview(IProcessDescription description,String type,boolean errorOutputAsException) throws CoreException {
  CsvArray csvArray=new CsvArray();
  CSVReader csvReader=null;
  try {
    if (description.getLoopLimit() == null) {
      description.setLoopLimit(-1);
    }
    final String pathStr=TalendQuoteUtils.removeQuotes(description.getFilepath());
    String fileSeparator=TalendQuoteUtils.removeQuotes(description.getFieldSeparator());
    String encoding=TalendQuoteUtils.removeQuotes(description.getEncoding());
    int headValue=description.getHeaderRow();
    if (fileSeparator.contains("String_Node_Str")) {
      fileSeparator=String.valueOf('\t');
    }
    IPath filePath=new Path(pathStr);
    File file=filePath.toFile();
    if (!file.exists()) {
      MessageUI.openWarning(Messages.getString("String_Node_Str"));
      return csvArray;
    }
    csvReader=new CSVReader(new BufferedReader(new InputStreamReader(new java.io.FileInputStream(file),encoding == null ? "String_Node_Str" : encoding)),ParameterUtil.trimParameter(fileSeparator).charAt(0));
    initCsvReader(csvReader,description);
    for (int i=0; i < headValue && csvReader.readNext(); i++) {
    }
    String[] rowValues=null;
    long currentRecord=csvReader.getCurrentRecord();
    while (csvReader.readNext() && currentRecord < 50) {
      currentRecord=csvReader.getCurrentRecord();
      rowValues=csvReader.getValues();
      csvArray.add(rowValues);
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
 finally {
    if (csvReader != null) {
      try {
        csvReader.close();
      }
 catch (      IOException e) {
        e.printStackTrace();
      }
    }
  }
  return csvArray;
}

Fixed version (ground truth):
public CsvArray preview(IProcessDescription description,String type,boolean errorOutputAsException) throws CoreException {
  CsvArray csvArray=new CsvArray();
  CSVReader csvReader=null;
  try {
    if (description.getLoopLimit() == null) {
      description.setLoopLimit(-1);
    }
    final String pathStr=TalendQuoteUtils.removeQuotes(description.getFilepath());
    String fileSeparator=TalendQuoteUtils.removeQuotes(description.getFieldSeparator());
    String encoding=TalendQuoteUtils.removeQuotes(description.getEncoding());
    int headValue=description.getHeaderRow();
    if (fileSeparator.contains("String_Node_Str")) {
      fileSeparator=String.valueOf('\t');
    }
    IPath filePath=new Path(pathStr);
    File file=filePath.toFile();
    if (!file.exists()) {
      MessageUI.openWarning(Messages.getString("String_Node_Str"));
      return csvArray;
    }
    csvReader=new CSVReader(new BufferedReader(new InputStreamReader(new java.io.FileInputStream(file),encoding == null ? "String_Node_Str" : encoding)),ParameterUtil.trimParameter(fileSeparator).charAt(0));
    initCsvReader(csvReader,description);
    for (int i=0; i < headValue && csvReader.readNext(); i++) {
    }
    int limitRows=description.getLimitRows();
    int currentRecord=0;
    while (csvReader.readNext() && currentRecord < 50) {
      currentRecord++;
      if (limitRows != -1 && currentRecord > limitRows) {
        break;
      }
      csvArray.add(csvReader.getValues());
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
 finally {
    if (csvReader != null) {
      try {
        csvReader.close();
      }
 catch (      IOException e) {
        e.printStackTrace();
      }
    }
  }
  return csvArray;
}