#0  0x00007fbff42e1324 in type_check_is_value_type_U (type=<optimized out>) at /build/buildd/glib2.0-2.31.16/./gobject/gtype.c:4105
        tflags = G_TYPE_FLAG_VALUE_ABSTRACT
        node = 0x16551270
#1  g_type_check_is_value_type (type=<optimized out>) at /build/buildd/glib2.0-2.31.16/./gobject/gtype.c:4133
No locals.
#2  0x00007fbff42e3bd1 in g_value_type_compatible (src_type=374674032, dest_type=26950544) at /build/buildd/glib2.0-2.31.16/./gobject/gvalue.c:500
        _g_boolean_var_ = <optimized out>
#3  0x00007fbff42c3939 in g_value_object_collect_value (value=0x7fbfcc19f708, n_collect_values=<optimized out>, collect_values=<optimized out>, collect_flags=<optimized out>) at /build/buildd/glib2.0-2.31.16/./gobject/gobject.c:3335
        object = 0x1bb9530
#4  0x00007fbff42d7e1d in g_signal_emit_valist (instance=0x1bce220, signal_id=<optimized out>, detail=0, var_args=0x7ffff27a4dc8) at /build/buildd/glib2.0-2.31.16/./gobject/gsignal.c:3007
        _val = 0x7fbfcc19f708
        _flags = 0
        _collect_format = <optimized out>
        _cvalues = {{v_int = 29070640, v_long = 29070640, v_int64 = 29070640, v_double = 1.4362804526618375e-316, v_pointer = 0x1bb9530}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_long = 0, v_int64 = 0, v_double = 0, v_pointer = 0x0}}
        _vtab = <optimized out>
        _n_values = <optimized out>
        error = <optimized out>
        ptype = 26950544
        instance_and_params = 0x7fbfcc19f6f0
        signal_return_type = 4
        param_values = 0x7fbfcc19f708
        node = 0x296d280
        i = <optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#5  0x00007fbff42d81d2 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.16/./gobject/gsignal.c:3090
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7ffff27a4ea0, reg_save_area = 0x7ffff27a4de0}}
#6  0x00007fbff0fcf0a7 in ?? ()
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.