Program: 11506
Project: 11506
Buggy source:
/** 
 * Add user selected bands to target product.
 */
private void addSelectedBands(){
  final Band[] sourceBands=OperatorUtils.getSourceBands(sourceProduct,sourceBandNames);
  final MetadataElement absRoot=AbstractMetadata.getAbstractedMetadata(sourceProduct);
  String tgtBandName;
  String tgtUnit;
  for (int i=0; i < sourceBands.length; i++) {
    final Band srcBand=sourceBands[i];
    final String srcBandName=srcBand.getName();
    final String unit=srcBand.getUnit();
    if (unit == null) {
      throw new OperatorException("String_Node_Str" + srcBandName + "String_Node_Str");
    }
    if (unit.contains(Unit.DB)) {
      throw new OperatorException("String_Node_Str");
    }
 else     if (unit.contains(Unit.PHASE)) {
      continue;
    }
 else     if (unit.contains(Unit.IMAGINARY)) {
      throw new OperatorException("String_Node_Str");
    }
 else     if (unit.contains(Unit.REAL)) {
      if (i + 1 >= sourceBands.length) {
        throw new OperatorException("String_Node_Str");
      }
      final String nextUnit=sourceBands[i + 1].getUnit();
      if (nextUnit == null || !nextUnit.contains(Unit.IMAGINARY)) {
        throw new OperatorException("String_Node_Str");
      }
      tgtBandName=srcBandName;
      tgtUnit=unit;
    }
 else {
      final String pol=OperatorUtils.getBandPolarization(srcBandName,absRoot);
      tgtBandName="String_Node_Str";
      if (pol != null && !pol.isEmpty()) {
        tgtBandName="String_Node_Str" + pol.toUpperCase();
      }
      tgtUnit=Unit.INTENSITY;
    }
    if (targetProduct.getBand(tgtBandName) == null) {
      Band tgtBand=targetProduct.addBand(tgtBandName,ProductData.TYPE_FLOAT32);
      tgtBand.setUnit(tgtUnit);
      targetBandToSourceBandMap.put(tgtBand,srcBand);
    }
  }
  if (outputSimulatedImage) {
    Band tgtBand=targetProduct.addBand("String_Node_Str",ProductData.TYPE_FLOAT32);
    tgtBand.setUnit("String_Node_Str");
  }
  targetBands=targetProduct.getBands();
  for (int i=0; i < targetBands.length; ++i) {
    if (targetBands[i].getUnit().equals(Unit.REAL)) {
      final String trgBandName=targetBands[i].getName();
      final String suffix=trgBandName.substring(trgBandName.indexOf("String_Node_Str"));
      ReaderUtils.createVirtualIntensityBand(targetProduct,targetBands[i],targetBands[i + 1],"String_Node_Str",suffix);
    }
  }
}

Fixed version (ground truth):
/** 
 * Add user selected bands to target product.
 */
private void addSelectedBands(){
  final Band[] sourceBands=OperatorUtils.getSourceBands(sourceProduct,sourceBandNames);
  final MetadataElement absRoot=AbstractMetadata.getAbstractedMetadata(sourceProduct);
  String tgtBandName;
  String tgtUnit;
  for (int i=0; i < sourceBands.length; i++) {
    final Band srcBand=sourceBands[i];
    final String srcBandName=srcBand.getName();
    final String unit=srcBand.getUnit();
    if (unit == null) {
      throw new OperatorException("String_Node_Str" + srcBandName + "String_Node_Str");
    }
    if (unit.contains(Unit.DB)) {
      throw new OperatorException("String_Node_Str");
    }
 else     if (unit.contains(Unit.PHASE)) {
      continue;
    }
 else     if (unit.contains(Unit.REAL) || unit.contains(Unit.IMAGINARY)) {
      tgtBandName=srcBandName;
      tgtUnit=unit;
    }
 else {
      final String pol=OperatorUtils.getBandPolarization(srcBandName,absRoot);
      tgtBandName="String_Node_Str";
      if (pol != null && !pol.isEmpty()) {
        tgtBandName="String_Node_Str" + pol.toUpperCase();
      }
      tgtUnit=Unit.INTENSITY;
    }
    if (targetProduct.getBand(tgtBandName) == null) {
      Band tgtBand=targetProduct.addBand(tgtBandName,ProductData.TYPE_FLOAT32);
      tgtBand.setUnit(tgtUnit);
      targetBandToSourceBandMap.put(tgtBand,srcBand);
    }
  }
  if (outputSimulatedImage) {
    Band tgtBand=targetProduct.addBand("String_Node_Str",ProductData.TYPE_FLOAT32);
    tgtBand.setUnit("String_Node_Str");
  }
  targetBands=targetProduct.getBands();
  for (int i=0; i < targetBands.length; ++i) {
    if (targetBands[i].getUnit().equals(Unit.REAL)) {
      final String trgBandName=targetBands[i].getName();
      final int idx=trgBandName.indexOf("String_Node_Str");
      String suffix="String_Node_Str";
      if (idx != -1) {
        suffix=trgBandName.substring(trgBandName.indexOf("String_Node_Str"));
      }
      ReaderUtils.createVirtualIntensityBand(targetProduct,targetBands[i],targetBands[i + 1],"String_Node_Str",suffix);
    }
  }
}