Program: 30630
Project: 30630
Buggy source:
private void populateWritersByBarcode(){
  final TabbedTextFileWithHeaderParser barcodeParamsParser=new TabbedTextFileWithHeaderParser(BARCODE_PARAMS);
  final String[] columnLabels=new String[]{"String_Node_Str","String_Node_Str","String_Node_Str"};
  for (  final String columnLabel : columnLabels) {
    if (!barcodeParamsParser.hasColumn(columnLabel)) {
      throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str"+ columnLabel+ "String_Node_Str");
    }
  }
  final List<String> barcodeColumnLabels=new ArrayList<String>();
  if (readStructure.barcodes.length() == 1) {
    if (barcodeParamsParser.hasColumn("String_Node_Str")) {
      barcodeColumnLabels.add("String_Node_Str");
    }
 else     if (barcodeParamsParser.hasColumn("String_Node_Str")) {
      barcodeColumnLabels.add("String_Node_Str");
    }
 else {
      throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str");
    }
  }
 else {
    for (int i=1; i <= readStructure.barcodes.length(); i++) {
      final String barcodeLabel="String_Node_Str" + i;
      if (!barcodeParamsParser.hasColumn(barcodeLabel)) {
        throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str"+ barcodeLabel+ "String_Node_Str");
      }
      barcodeColumnLabels.add(barcodeLabel);
    }
  }
  for (  final TabbedTextFileWithHeaderParser.Row row : barcodeParamsParser) {
    final List<String> barcodeValues=new ArrayList<String>();
    for (    final String barcodeLabel : barcodeColumnLabels) {
      barcodeValues.add(row.getField(barcodeLabel));
    }
    final String[] barcodeValuesArray=barcodeValues.toArray(new String[]{});
    final String key=(barcodeValues.contains("String_Node_Str") ? null : IlluminaUtil.barcodeSeqsToString(barcodeValuesArray));
    if (writersByBarcode.containsKey(key)) {
      throw new PicardException("String_Node_Str" + key + "String_Node_Str"+ BARCODE_PARAMS);
    }
    final SAMFileWriter writer=buildSamFileWriter(new File(row.getField("String_Node_Str")),row.getField("String_Node_Str"),row.getField("String_Node_Str"),barcodeValuesArray);
    writersByBarcode.put(key,writer);
  }
  if (writersByBarcode.isEmpty()) {
    throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str");
  }
}

Fixed version (ground truth):
private void populateWritersByBarcode(){
  final TabbedTextFileWithHeaderParser barcodeParamsParser=new TabbedTextFileWithHeaderParser(BARCODE_PARAMS);
  final String[] columnLabels=new String[]{"String_Node_Str","String_Node_Str","String_Node_Str"};
  for (  final String columnLabel : columnLabels) {
    if (!barcodeParamsParser.hasColumn(columnLabel)) {
      throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str"+ columnLabel+ "String_Node_Str");
    }
  }
  final List<String> barcodeColumnLabels=new ArrayList<String>();
  if (readStructure.barcodes.length() == 1) {
    if (barcodeParamsParser.hasColumn("String_Node_Str")) {
      barcodeColumnLabels.add("String_Node_Str");
    }
 else     if (barcodeParamsParser.hasColumn("String_Node_Str")) {
      barcodeColumnLabels.add("String_Node_Str");
    }
 else {
      throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str");
    }
  }
 else {
    for (int i=1; i <= readStructure.barcodes.length(); i++) {
      final String barcodeLabel="String_Node_Str" + i;
      if (!barcodeParamsParser.hasColumn(barcodeLabel)) {
        throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str"+ barcodeLabel+ "String_Node_Str");
      }
      barcodeColumnLabels.add(barcodeLabel);
    }
  }
  for (  final TabbedTextFileWithHeaderParser.Row row : barcodeParamsParser) {
    final List<String> barcodeValues=new ArrayList<String>();
    for (    final String barcodeLabel : barcodeColumnLabels) {
      barcodeValues.add(row.getField(barcodeLabel));
    }
    final String[] barcodeValuesArray=barcodeValues.toArray(new String[]{});
    final String key=(barcodeValues.contains("String_Node_Str") ? null : StringUtil.join("String_Node_Str",barcodeValuesArray));
    if (writersByBarcode.containsKey(key)) {
      throw new PicardException("String_Node_Str" + key + "String_Node_Str"+ BARCODE_PARAMS);
    }
    final SAMFileWriter writer=buildSamFileWriter(new File(row.getField("String_Node_Str")),row.getField("String_Node_Str"),row.getField("String_Node_Str"),barcodeValuesArray);
    writersByBarcode.put(key,writer);
  }
  if (writersByBarcode.isEmpty()) {
    throw new PicardException("String_Node_Str" + BARCODE_PARAMS + "String_Node_Str");
  }
}