#0  0x00007f1532489c1c in g_object_unref (_object=0x21) at /build/buildd/glib2.0-2.39.92/./gobject/gobject.c:3009
        __inst = 0x21
        __r = <optimized out>
        _g_boolean_var_ = <optimized out>
        object = 0x21
        old_ref = <optimized out>
        __FUNCTION__ = "g_object_unref"
#1  0x00007f1532798ac6 in g_bus_unwatch_name (watcher_id=33) at /build/buildd/glib2.0-2.39.92/./gio/gdbusnamewatching.c:823
        client = <optimized out>
        __FUNCTION__ = "g_bus_unwatch_name"
#2  0x00007f152f4ed7c0 in ?? ()
No symbol table info available.
#3  0x00007f152f4ed750 in ?? ()
No symbol table info available.
#4  0x00007f1530f1a40c in ffi_call (cif=0x8445c70200cf81, cif@entry=<error reading variable: Cannot access memory at address 0x7f1530f1aae4>, fn=0xf03fa83c0960f03, rvalue=0xd2843774c084c296, avalue=0x7f152f4ed760) at ../src/x86/ffi64.c:522
        classes = <error reading variable classes (Cannot access memory at address 0x7f1530f1aa8c)>
        stack = 0x89c7b70f41000000 <Address 0x89c7b70f41000000 out of bounds>
        argp = 0x7f152f4ed650 ""
        arg_types = <optimized out>
        gprcount = -945820673
        ssecount = <optimized out>
        ngpr = <error reading variable ngpr (Cannot access memory at address 0x7f1530f1aa84)>
        nsse = <error reading variable nsse (Cannot access memory at address 0x7f1530f1aa88)>
        i = <optimized out>
        avn = <optimized out>
        ret_in_memory = <optimized out>
        reg_args = 0x89c7b70f41000000