[macOS] g_object_ref assertion failure with fullscreen windows
In a macOS application, an error is logged when a window is fullscreen and you hover the mouse over the Dock at the bottom of the screen. This is the message:
(<unknown>:16521): GLib-GObject-CRITICAL **: 23:57:37.264: g_object_ref: assertion 'G_IS_OBJECT (object)' failed
It looks like this commit has something to do with it: 5c039a1a
You can reproduce this easily by running gtk3-demo-application
on a Mac, clicking the green button to make it fullscreen, and then moving the mouse to the bottom of the screen to show the Dock.