Comment 2 for bug 1279928

StacktraceTop:
 device_changed (client=0x429b920, variant=0x4288ea0, property=0x4208450 "Paired", device=0x4332b50) at bluetooth-client.c:437
 device_g_signal (proxy=<optimized out>, sender_name=<optimized out>, signal_name=<optimized out>, parameters=<optimized out>, client=0x429b920) at bluetooth-client.c:501
 ffi_call_unix64 () at ../src/x86/unix64.S:76
 ffi_call (cif=cif@entry=0x7fff2901c220, fn=0x7f03b5f993d0 <device_g_signal>, rvalue=0x7fff2901c190, avalue=avalue@entry=0x7fff2901c110) at ../src/x86/ffi64.c:522
 g_cclosure_marshal_generic (closure=0x4215c40, return_gvalue=0x0, n_param_values=<optimized out>, param_values=<optimized out>, invocation_hint=<optimized out>, marshal_data=0x0) at /build/buildd/glib2.0-2.39.4/./gobject/gclosure.c:1447