?? ()
g_closure_invoke (closure=0x878080, return_value=0x0, n_param_values=2, param_values=0x7fff45b17b70, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gclosure.c:777
signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0x7fff45b17b70) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3547
g_signal_emit_valist (instance=0x862000, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3296
g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3352