Program: 24600
Project: 24600
Buggy source:
public void build(EdiHandler handler) throws EdiException {
  Preconditions.checkState(created != null,"String_Node_Str");
  Preconditions.checkState(stage != null,"String_Node_Str");
  Preconditions.checkState(interchangeVersionId != null,"String_Node_Str");
  StringBuffer createdDateBuffer=new StringBuffer();
  Strings.padLeft(Integer.toString(created.get(Calendar.YEAR)).substring(2,4),'0',2,createdDateBuffer,2);
  Strings.padLeft(Integer.toString(created.get(Calendar.MONTH)),'0',2,createdDateBuffer);
  Strings.padLeft(Integer.toString(created.get(Calendar.DAY_OF_MONTH)),'0',2,createdDateBuffer);
  StringBuffer createdTimeBuffer=new StringBuffer();
  Strings.padLeft(Integer.toString(created.get(Calendar.HOUR_OF_DAY)),'0',2,createdTimeBuffer);
  Strings.padLeft(Integer.toString(created.get(Calendar.MINUTE)),'0',2,createdTimeBuffer);
  String controlNumber=Strings.padLeft(Integer.toString(ediBuilder.getIsaSequenceNumber()),'0',9);
  String fields[]={authorizeInfoQualifier == null ? "String_Node_Str" : authorizeInfoQualifier,authorizeInfo == null ? "String_Node_Str" : authorizeInfo,securityInfoQualifier == null ? "String_Node_Str" : securityInfoQualifier,securityInfo == null ? "String_Node_Str" : securityInfo,interchangeSenderIdQualifier == null ? "String_Node_Str" : interchangeSenderIdQualifier,interchangeSenderId == null ? "String_Node_Str" : interchangeSenderId,interchangeReceiverIdQualifier == null ? "String_Node_Str" : interchangeReceiverIdQualifier,interchangeReceiverId == null ? "String_Node_Str" : interchangeReceiverId,createdDateBuffer.toString(),createdTimeBuffer.toString(),interchangeStandardsId == null ? "String_Node_Str" : interchangeStandardsId,interchangeVersionId,controlNumber,acknowledgeRequested ? "String_Node_Str" : "String_Node_Str",stage.getIndicator(),Character.toString(subElementSeparator)};
  handler.startSegment("String_Node_Str");
  for (  String field : fields) {
    handler.startElement(field);
    handler.endElement();
  }
}

Fixed version (ground truth):
public void build(EdiHandler handler) throws EdiException {
  Preconditions.checkState(created != null,"String_Node_Str");
  Preconditions.checkState(stage != null,"String_Node_Str");
  Preconditions.checkState(interchangeVersionId != null,"String_Node_Str");
  StringBuffer createdDateBuffer=new StringBuffer();
  Strings.padLeft(Integer.toString(created.get(Calendar.YEAR)).substring(2,4),'0',2,createdDateBuffer,2);
  Strings.padLeft(Integer.toString(created.get(Calendar.MONTH)),'0',2,createdDateBuffer);
  Strings.padLeft(Integer.toString(created.get(Calendar.DAY_OF_MONTH)),'0',2,createdDateBuffer);
  StringBuffer createdTimeBuffer=new StringBuffer();
  Strings.padLeft(Integer.toString(created.get(Calendar.HOUR_OF_DAY)),'0',2,createdTimeBuffer);
  Strings.padLeft(Integer.toString(created.get(Calendar.MINUTE)),'0',2,createdTimeBuffer);
  String controlNumber=Strings.padLeft(Integer.toString(ediBuilder.getIsaSequenceNumber()),'0',9);
  String fields[]={authorizeInfoQualifier == null ? "String_Node_Str" : authorizeInfoQualifier,authorizeInfo == null ? "String_Node_Str" : authorizeInfo,securityInfoQualifier == null ? "String_Node_Str" : securityInfoQualifier,securityInfo == null ? "String_Node_Str" : securityInfo,interchangeSenderIdQualifier == null ? "String_Node_Str" : interchangeSenderIdQualifier,interchangeSenderId == null ? "String_Node_Str" : interchangeSenderId,interchangeReceiverIdQualifier == null ? "String_Node_Str" : interchangeReceiverIdQualifier,interchangeReceiverId == null ? "String_Node_Str" : interchangeReceiverId,createdDateBuffer.toString(),createdTimeBuffer.toString(),interchangeStandardsId == null ? "String_Node_Str" : interchangeStandardsId,interchangeVersionId,controlNumber,acknowledgeRequested ? "String_Node_Str" : "String_Node_Str",stage.getIndicator(),Character.toString(subElementSeparator)};
  handler.startSegment("String_Node_Str");
  for (  String field : fields) {
    handler.startElement(field);
    handler.endElement();
  }
  handler.endSegment();
}