Comment 2 for bug 1273014

StacktraceTop:
 g_source_remove (tag=21) at /build/buildd/glib2.0-2.39.3/./glib/gmain.c:2211
 queue_update (queue=0x127a150) at nd-queue.c:929
 g_closure_invoke (closure=0x13ce1c0, return_value=0x0, n_param_values=1, param_values=0x7fff2d0fe010, invocation_hint=0x7fff2d0fdfb0) at /build/buildd/glib2.0-2.39.3/./gobject/gclosure.c:777
 signal_emit_unlocked_R (node=node@entry=0x1233d30, detail=detail@entry=0, instance=instance@entry=0x14342c0, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff2d0fe010) at /build/buildd/glib2.0-2.39.3/./gobject/gsignal.c:3556
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff2d0fe198) at /build/buildd/glib2.0-2.39.3/./gobject/gsignal.c:3312