Program: 32223
Project: 32223
Buggy source:
/** 
 * Takes a list of RPCRequests and sends it to SDL. Responses are captured through callback on OnMultipleRequestListener. For sending requests synchronously, use sendSequentialRequests <br> <strong>NOTE: This will override any listeners on individual RPCs</strong>
 * @param rpcs is the list of RPCRequests being sent
 * @param listener listener for updates and completions
 * @throws SdlException if an unrecoverable error is encountered
 */
@SuppressWarnings("String_Node_Str") public void sendRequests(List<RPCRequest> rpcs,final OnMultipleRequestListener listener) throws SdlException {
  if (_proxyDisposed) {
    throw new SdlException("String_Node_Str",SdlExceptionCause.SDL_PROXY_DISPOSED);
  }
  SdlTrace.logProxyEvent("String_Node_Str",SDL_LIB_TRACE_KEY);
synchronized (CONNECTION_REFERENCE_LOCK) {
    if (!getIsConnected()) {
      SdlTrace.logProxyEvent("String_Node_Str",SDL_LIB_TRACE_KEY);
      throw new SdlException("String_Node_Str",SdlExceptionCause.SDL_UNAVAILABLE);
    }
  }
  if (rpcs == null) {
    throw new SdlException("String_Node_Str",SdlExceptionCause.INVALID_ARGUMENT);
  }
  int arraySize=rpcs.size();
  if (arraySize == 0) {
    throw new SdlException("String_Node_Str",SdlExceptionCause.INVALID_ARGUMENT);
  }
  for (int i=0; i < arraySize; i++) {
    RPCRequest rpc=rpcs.get(i);
    rpc.setCorrelationID(CorrelationIdGenerator.generateId());
    listener.addCorrelationId(rpc.getCorrelationID());
    rpc.setOnRPCResponseListener(listener.getSingleRpcResponseListener());
    sendRPCRequestPrivate(rpc);
  }
}

Fixed version (ground truth):
/** 
 * Takes a list of RPCRequests and sends it to SDL. Responses are captured through callback on OnMultipleRequestListener. For sending requests synchronously, use sendSequentialRequests <br> <strong>NOTE: This will override any listeners on individual RPCs</strong>
 * @param rpcs is the list of RPCRequests being sent
 * @param listener listener for updates and completions
 * @throws SdlException if an unrecoverable error is encountered
 */
@SuppressWarnings("String_Node_Str") public void sendRequests(List<? extends RPCRequest> rpcs,final OnMultipleRequestListener listener) throws SdlException {
  if (_proxyDisposed) {
    throw new SdlException("String_Node_Str",SdlExceptionCause.SDL_PROXY_DISPOSED);
  }
  SdlTrace.logProxyEvent("String_Node_Str",SDL_LIB_TRACE_KEY);
synchronized (CONNECTION_REFERENCE_LOCK) {
    if (!getIsConnected()) {
      SdlTrace.logProxyEvent("String_Node_Str",SDL_LIB_TRACE_KEY);
      throw new SdlException("String_Node_Str",SdlExceptionCause.SDL_UNAVAILABLE);
    }
  }
  if (rpcs == null) {
    throw new SdlException("String_Node_Str",SdlExceptionCause.INVALID_ARGUMENT);
  }
  int arraySize=rpcs.size();
  if (arraySize == 0) {
    throw new SdlException("String_Node_Str",SdlExceptionCause.INVALID_ARGUMENT);
  }
  for (int i=0; i < arraySize; i++) {
    RPCRequest rpc=rpcs.get(i);
    rpc.setCorrelationID(CorrelationIdGenerator.generateId());
    if (listener != null) {
      listener.addCorrelationId(rpc.getCorrelationID());
      rpc.setOnRPCResponseListener(listener.getSingleRpcResponseListener());
    }
    sendRPCRequestPrivate(rpc);
  }
}