Program: 68386
Project: 68386
Buggy source:
public boolean startElement(XPathFragment xPathFragment,UnmarshalRecord unmarshalRecord,Attributes atts){
  unmarshalRecord.removeNullCapableValue(this);
  XMLField xmlField=(XMLField)xmlBinaryDataMapping.getField();
  XPathFragment lastFragment=xmlField.getLastXPathFragment();
  if (!xmlBinaryDataMapping.isSwaRef() && !xmlBinaryDataMapping.shouldInlineBinaryData() && !lastFragment.isAttribute()) {
    if ((unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller() != null) && unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller().isXOPPackage()) {
      XMLBinaryAttachmentHandler handler=new XMLBinaryAttachmentHandler(unmarshalRecord,this,this.xmlBinaryDataMapping);
      unmarshalRecord.getXMLReader().setContentHandler(handler);
    }
  }
 else   if (lastFragment.isAttribute()) {
    String value=atts.getValue(lastFragment.getNamespaceURI(),lastFragment.getLocalName());
    Object fieldValue=null;
    if (xmlBinaryDataMapping.isSwaRef()) {
      if (unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller() != null) {
        if (xmlBinaryDataMapping.getAttributeClassification() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
          fieldValue=unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller().getAttachmentAsDataHandler(value);
        }
 else {
          fieldValue=unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller().getAttachmentAsByteArray(value);
        }
        xmlBinaryDataMapping.setAttributeValueInObject(unmarshalRecord.getCurrentObject(),XMLBinaryDataHelper.getXMLBinaryDataHelper().convertObject(fieldValue,xmlBinaryDataMapping.getAttributeClassification(),unmarshalRecord.getSession()));
      }
    }
 else {
      fieldValue=((XMLConversionManager)unmarshalRecord.getSession().getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(value);
      xmlBinaryDataMapping.setAttributeValueInObject(unmarshalRecord.getCurrentObject(),XMLBinaryDataHelper.getXMLBinaryDataHelper().convertObject(fieldValue,xmlBinaryDataMapping.getAttributeClassification(),unmarshalRecord.getSession()));
    }
  }
  return true;
}

Fixed version (ground truth):
public boolean startElement(XPathFragment xPathFragment,UnmarshalRecord unmarshalRecord,Attributes atts){
  try {
    unmarshalRecord.removeNullCapableValue(this);
    XMLField xmlField=(XMLField)xmlBinaryDataMapping.getField();
    XPathFragment lastFragment=xmlField.getLastXPathFragment();
    if (!lastFragment.isAttribute()) {
      BinaryMappingContentHandler handler=new BinaryMappingContentHandler(unmarshalRecord,this,this.xmlBinaryDataMapping);
      String qnameString=xPathFragment.getLocalName();
      if (xPathFragment.getPrefix() != null) {
        qnameString=xPathFragment.getPrefix() + "String_Node_Str" + qnameString;
      }
      handler.startElement(xPathFragment.getNamespaceURI(),xPathFragment.getLocalName(),qnameString,atts);
      unmarshalRecord.getXMLReader().setContentHandler(handler);
    }
 else     if (lastFragment.isAttribute()) {
      String value=atts.getValue(lastFragment.getNamespaceURI(),lastFragment.getLocalName());
      Object fieldValue=null;
      if (xmlBinaryDataMapping.isSwaRef()) {
        if (unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller() != null) {
          if (xmlBinaryDataMapping.getAttributeClassification() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
            fieldValue=unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller().getAttachmentAsDataHandler(value);
          }
 else {
            fieldValue=unmarshalRecord.getUnmarshaller().getAttachmentUnmarshaller().getAttachmentAsByteArray(value);
          }
          xmlBinaryDataMapping.setAttributeValueInObject(unmarshalRecord.getCurrentObject(),XMLBinaryDataHelper.getXMLBinaryDataHelper().convertObject(fieldValue,xmlBinaryDataMapping.getAttributeClassification(),unmarshalRecord.getSession()));
        }
      }
 else {
        fieldValue=((XMLConversionManager)unmarshalRecord.getSession().getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(value);
        xmlBinaryDataMapping.setAttributeValueInObject(unmarshalRecord.getCurrentObject(),XMLBinaryDataHelper.getXMLBinaryDataHelper().convertObject(fieldValue,xmlBinaryDataMapping.getAttributeClassification(),unmarshalRecord.getSession()));
      }
    }
    return true;
  }
 catch (  SAXException ex) {
    throw XMLMarshalException.unmarshalException(ex);
  }
}