Program: 32221
Project: 32221
Buggy source:
/** 
 * Takes a list of RPCRequests and sends it to SDL in a synchronous fashion. Responses are captured through callback on OnMultipleRequestListener. For sending requests asynchronously, use sendRequests <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 sendSequentialRequests(final 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 requestCount=rpcs.size();
  if (requestCount == 0) {
    listener.onFinished();
    return;
  }
  RPCRequest rpc=rpcs.remove(0);
  rpc.setCorrelationID(CorrelationIdGenerator.generateId());
  rpc.setOnRPCResponseListener(new OnRPCResponseListener(){
    @Override public void onResponse(    int correlationId,    RPCResponse response){
      if (response.getSuccess()) {
        listener.onUpdate(rpcs.size());
        try {
          sendSequentialRequests(rpcs,listener);
        }
 catch (        SdlException e) {
          e.printStackTrace();
          listener.onError(correlationId,Result.GENERIC_ERROR,e.toString());
        }
      }
    }
    @Override public void onError(    int correlationId,    Result resultCode,    String info){
      listener.onError(correlationId,resultCode,info);
    }
  }
);
  sendRPCRequestPrivate(rpc);
}

Fixed version (ground truth):
/** 
 * Takes a list of RPCRequests and sends it to SDL in a synchronous fashion. Responses are captured through callback on OnMultipleRequestListener. For sending requests asynchronously, use sendRequests <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 sendSequentialRequests(final 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 requestCount=rpcs.size();
  if (requestCount == 0) {
    if (listener != null) {
      listener.onFinished();
    }
    return;
  }
  RPCRequest rpc=rpcs.remove(0);
  rpc.setCorrelationID(CorrelationIdGenerator.generateId());
  rpc.setOnRPCResponseListener(new OnRPCResponseListener(){
    @Override public void onResponse(    int correlationId,    RPCResponse response){
      if (response.getSuccess()) {
        if (listener != null) {
          listener.onUpdate(rpcs.size());
        }
        try {
          sendSequentialRequests(rpcs,listener);
        }
 catch (        SdlException e) {
          e.printStackTrace();
          if (listener != null) {
            listener.onError(correlationId,Result.GENERIC_ERROR,e.toString());
          }
        }
      }
    }
    @Override public void onError(    int correlationId,    Result resultCode,    String info){
      if (listener != null) {
        listener.onError(correlationId,resultCode,info);
      }
    }
  }
);
  sendRPCRequestPrivate(rpc);
}