There is a race condition at around line nos 422-435 in ev-sidebar-thumbnails.c. An EvJob is being initialized and pushed to the scheduler before connecting the finished callback for the job.


>job = ev_job_thumbnail_new (priv->document,
		  	    page, priv->rotation,
			    get_scale_for_page (sidebar_thumbnails, page));
>ev_job_thumbnail_set_has_frame (EV_JOB_THUMBNAIL (job), FALSE);
>ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
>			
>g_object_set_data_full (G_OBJECT (job), "tree_iter",
>			 gtk_tree_iter_copy (&iter),
>			 (GDestroyNotify) gtk_tree_iter_free);
>g_signal_connect (job, "finished",
>		   G_CALLBACK (thumbnail_job_completed_callback),
>		   sidebar_thumbnails);