Program: 53275
Project: 53275
Buggy source:
private boolean getLNData(java.nio.ByteBuffer buff,int[] pError,java.util.Set<RequestTypes> MoreData,int command){
  int res=command;
  buff.get();
  if (res == 0xD8) {
    StateError stateError=StateError.forValue(buff.get());
    ServiceError serviceError=ServiceError.forValue(buff.get());
    throw new GXDLMSException(stateError.toString() + "String_Node_Str" + serviceError.toString());
  }
  boolean server=this.getServer();
  if (res != 0x60 && res != 0x63 && res != Command.GetResponse.getValue() && res != Command.SetResponse.getValue() && res != Command.SetRequest.getValue() && res != Command.GetRequest.getValue() && res != Command.MethodRequest.getValue() && res != Command.MethodResponse.getValue()) {
    throw new GXDLMSException("String_Node_Str");
  }
  byte AttributeID=buff.get();
  buff.get();
  if (server && AttributeID == 0x2) {
    MoreData.add(RequestTypes.DATABLOCK);
  }
 else   if (res == Command.SetRequest.getValue()) {
    MoreData.clear();
  }
 else   if (res == Command.SetResponse.getValue() || res == Command.MethodResponse.getValue()) {
    if (buff.get() != 0) {
      pError[0]=buff.get();
    }
  }
 else {
    if (server && AttributeID == 0x01) {
    }
 else {
      byte Priority=buff.get();
      if (AttributeID == 0x01 && Priority != 0) {
        pError[0]=buff.get();
      }
 else {
        if (AttributeID == 0x02) {
          if (Priority == 0) {
            MoreData.add(RequestTypes.DATABLOCK);
          }
          packetIndex=buff.getInt();
          buff.get();
          int[] index=new int[]{buff.position()};
          GXCommon.getObjectCount(buff,index);
          buff.position(index[0]);
        }
      }
    }
  }
  return true;
}

Fixed version (ground truth):
private boolean getLNData(java.nio.ByteBuffer buff,int[] pError,java.util.Set<RequestTypes> MoreData,int command){
  int res=command;
  buff.get();
  if (res == 0xD8) {
    StateError stateError=StateError.forValue(buff.get());
    ServiceError serviceError=ServiceError.forValue(buff.get());
    throw new GXDLMSException(stateError.toString() + "String_Node_Str" + serviceError.toString());
  }
  boolean server=this.getServer();
  if (res != 0x60 && res != 0x63 && res != Command.GetResponse.getValue() && res != Command.SetResponse.getValue() && res != Command.SetRequest.getValue() && res != Command.GetRequest.getValue() && res != Command.MethodRequest.getValue() && res != Command.MethodResponse.getValue()) {
    throw new GXDLMSException("String_Node_Str");
  }
  byte AttributeID=buff.get();
  buff.get();
  if (server && AttributeID == 0x2) {
    MoreData.add(RequestTypes.DATABLOCK);
  }
 else   if (res == Command.SetRequest.getValue()) {
    MoreData.clear();
  }
 else   if (res == Command.SetResponse.getValue() || res == Command.MethodResponse.getValue()) {
    pError[0]=buff.get();
  }
 else {
    if (server && AttributeID == 0x01) {
    }
 else {
      byte Priority=buff.get();
      if (AttributeID == 0x01 && Priority != 0) {
        pError[0]=buff.get();
      }
 else {
        if (AttributeID == 0x02) {
          if (Priority == 0) {
            MoreData.add(RequestTypes.DATABLOCK);
          }
          packetIndex=buff.getInt();
          buff.get();
          int[] index=new int[]{buff.position()};
          GXCommon.getObjectCount(buff,index);
          buff.position(index[0]);
        }
      }
    }
  }
  return true;
}