Comment 2 for bug 1057398

StacktraceTop:
 g_type_instance_get_private (instance=instance@entry=0x7f727bf17000, private_type=140129683325904) at /build/buildd/glib2.0-2.33.14/./gobject/gtype.c:4517
 device_changed (client=0x7f727bf17000, variant=0x7f727c14f4c0, property=0x7f727c18d270 "Connected", device=0x7f727c0da4e0) at bluetooth-client.c:433
 device_g_signal (client=0x7f727bf17000, parameters=<optimized out>, proxy=0x7f727c0da4e0, sender_name=<optimized out>, signal_name=<optimized out>) at bluetooth-client.c:500
 device_g_signal (proxy=0x7f727c0da4e0, sender_name=<optimized out>, signal_name=<optimized out>, parameters=<optimized out>, client=0x7f727bf17000) at bluetooth-client.c:487
 ffi_call_unix64 () at ../src/x86/unix64.S:75