#0  0x00007f42f0c37bcc in g_object_unref (_object=0xaaaaaaaaaaaaaaaa) at /build/buildd/glib2.0-2.37.6/./gobject/gobject.c:3099
  [Error: /build/buildd/glib2.0-2.37.6/./gobject/gobject.c was not found in source tree]
#1  0x000000000045128c in hostname_proxy_new_cb (source_object=<optimized out>, res=<optimized out>, user_data=0x160c9b0) at nautilus-places-sidebar.c:3264
  3259: {
  3260: 	NautilusPlacesSidebar *sidebar = user_data;
  3261: 	GError *error = NULL;
  3262: 
  3263: 	sidebar->hostnamed_proxy = g_dbus_proxy_new_for_bus_finish (res, &error);
  3264: 	g_clear_object (&sidebar->hostnamed_cancellable);
  3265: 
  3266: 	if (error != NULL) {
  3267: 		g_debug ("Failed to create D-Bus proxy: %s", error->message);
  3268: 		g_error_free (error);
  3269: 		return;
#2  0x00007f42f0ee6b0e in run_in_thread (job=<optimized out>, c=<optimized out>, _data=0x451240 <hostname_proxy_new_cb>) at /build/buildd/glib2.0-2.37.6/./gio/gsimpleasyncresult.c:879
  [Error: /build/buildd/glib2.0-2.37.6/./gio/gsimpleasyncresult.c was not found in source tree]
#3  0x00007f42f0ee6b7c in g_simple_async_result_complete (simple=0x7f42a0004870) at /build/buildd/glib2.0-2.37.6/./gio/gsimpleasyncresult.c:762
  [Error: /build/buildd/glib2.0-2.37.6/./gio/gsimpleasyncresult.c was not found in source tree]
#4  0x00007fff62e2bf50 in ?? ()
#5  0x00007f42f0968200 in g_main_context_ref_thread_default () at /build/buildd/glib2.0-2.37.6/./glib/gmain.c:824
  [Error: /build/buildd/glib2.0-2.37.6/./glib/gmain.c was not found in source tree]
#6  0x00007fff62e2bf40 in ?? ()
#7  0x00007fff62e2bf48 in ?? ()
#8  0x00007f42a0004870 in ?? ()
#9  0x00007f42f0ee6b60 in ?? () at /build/buildd/glib2.0-2.37.6/./gio/gsimpleasyncresult.c:866 from /tmp/apport_sandbox_xPyGjV/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#10 0x0000000001f479d0 in ?? ()
#11 0x0000000000000000 in ?? ()