g_object_unref: assertion 'G_IS_OBJECT (object)' failed Attempt to unlock mutex that was not locked

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Hello evryone, i am following this tutorial to create my image subscriber link text, using image_transport, however, i meet this problem when i run my subscriber.

(view:19049): GLib-GObject-CRITICAL **: 22:58:39.962: g_object_unref: assertion 'G_IS_OBJECT (object)' failed Attempt to unlock mutex that was not locked Aborted (core dumped) This is my source code:

#include <ros/ros.h>
#include <image_transport/image_transport.h>
#include <opencv2/highgui/highgui.hpp>
#include <cv_bridge/cv_bridge.h>

void imageCallback(const sensor_msgs::ImageConstPtr& msg)
{
  try
      {
    cv::imshow("view", cv_bridge::toCvShare(msg, "bgr8")->image);
    cv::waitKey(30);
  }
  catch (cv_bridge::Exception& e)
  {
    ROS_ERROR("Could not convert from '%s' to 'bgr8'.", msg->encoding.c_str());
  }
}

int main(int argc, char **argv)
{
  ros::init(argc, argv, "image_listener");
  ros::NodeHandle nh;
  cv::namedWindow("view");
  cv::startWindowThread();
  image_transport::ImageTransport it(nh);
  image_transport::Subscriber sub = it.subscribe("camera/image", 1, imageCallback);

  ros::spin();
  cv::waitKey(0);

  cv::destroyWindow("view"); 
}

Can you help me to solve this ? Thanks in advances!