.
Thread 1 (process 6318):
#0  0x00007f0a68400533 in g_signal_emit_valist (
    instance=<value optimized out>, signal_id=<value optimized out>, 
    detail=369, var_args=0x7fffacebad70)
    at /build/buildd/glib2.0-2.25.15/gobject/gsignal.c:3015
	signal_return_type = 1
	param_values = <value optimized out>
	node = <value optimized out>
	i = <value optimized out>
	n_params = <value optimized out>
	__PRETTY_FUNCTION__ = "g_signal_emit_valist"
#1  0x00007f0a68400f43 in g_signal_emit_by_name (
    instance=<value optimized out>, detailed_signal=<value optimized out>)
    at /build/buildd/glib2.0-2.25.15/gobject/gsignal.c:338
	detail = <value optimized out>
	signal_id = <value optimized out>
	__PRETTY_FUNCTION__ = "g_signal_emit_by_name"
#2  0x0000000000000000 in ?? ()
No symbol table info available.