#0  0x00007f5cfb5ff6fc in g_hash_table_lookup (hash_table=0x243fd20, key=0x27c2030) at /build/buildd/glib2.0-2.29.10/./glib/ghash.c:1016
        node_hash = <value optimized out>
        __PRETTY_FUNCTION__ = "g_hash_table_lookup"
#1  0x00007f5cfc05679d in handler_list_lookup (node=<value optimized out>, detail=0, instance=0x27c2030, emission_return=0x0, instance_and_params=0x416c640) at /build/buildd/glib2.0-2.29.10/./gobject/gsignal.c:406
        hlbsa = <value optimized out>
        key = {signal_id = 41647744, handlers = 0x7f5cfc06c547, tail_before = 0x27b7e80, tail_after = 0x7f5cfc046834}
#2  signal_emit_unlocked_R (node=<value optimized out>, detail=0, instance=0x27c2030, emission_return=0x0, instance_and_params=0x416c640) at /build/buildd/glib2.0-2.29.10/./gobject/gsignal.c:3173
        accumulator = 0x0
        emission = {next = 0x7fff970fb730, instance = 0x27c2030, ihint = {signal_id = 33, detail = 0, run_type = 0}, state = EMISSION_STOP, chain_type = 4}
        class_closure = 0x24889f0
        hlist = 0x7f5cfb8ba820
        handler_list = <value optimized out>
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 33
        max_sequential_handler_number = 10765
        return_value_altered = <value optimized out>
#3  0x00007f5cfc060707 in g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=0x7fff970fb2c8) at /build/buildd/glib2.0-2.29.10/./gobject/gsignal.c:2987
        instance_and_params = 0x416c640
        signal_return_type = 4
        param_values = 0x416c658
        node = 0x2488a60
        i = <value optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#4  0x00007f5cfc0608d2 in g_signal_emit (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./gobject/gsignal.c:3044
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff970fb3a0, reg_save_area = 0x7fff970fb2e0}}
#5  0x00007f5cfcdf459b in gtk_grab_notify_foreach (child=0x27c2030, data=0x7fff970fb580) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmain.c:2098
        __inst = 0x27c2030
        __t = <value optimized out>
        __r = <value optimized out>
        info = 0x7fff970fb580
        was_grabbed = 0
        is_grabbed = 0
        was_shadowed = 0
        is_shadowed = 1
        devices = <value optimized out>
#6  0x00007f5cfcd1d1d3 in gtk_box_get_path_for_child (container=<value optimized out>, child=0x24da890) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkbox.c:922
        path = 0x24889f0
        sibling_path = <value optimized out>
        box = <value optimized out>
        private = 0x7fff970fb580
        list = <value optimized out>
        children = <value optimized out>
#7  0x0000000000000000 in ?? ()
No symbol table info available.