Follow the image_transport tutorial and met a problem with my_subscriber node

[Yuc_Yao]

Follow the tutorial and the my_publisher node went well, but when I rosrun my_subscriber node, the 'view' window flashed and gone, command line is shown as followed:

rosrun image_transport_tutorial my_subscriber

(view:4441): GLib-GObject-CRITICAL **: 20:30:25.725: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

(view:4441): GLib-GObject-CRITICAL **: 20:30:25.776: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

Attempt to unlock mutex that was not locked