gnome-settings-daemon crashes with SIGSEGV in watcher_owner_changed()

[Sebastien Bacher]

On current natty:
- start a session with one keyboard layout
- use gnome-keyboard-properties to add a second one and delete it
- stop the indicator-application-service

then g-s-d crashes with that stacktrace:

#0 0x00f91a40 in watcher_owner_changed (obj=0x8a59e00, pspec=0x89c6478, user_data=0x89c8d20) at /build/buildd/libappindicator-0.2.92/./src/app-indicator.c:1139
        _g_boolean_var_ = <value optimised out>
        self = 0x89c8d20
        __PRETTY_FUNCTION__ = "watcher_owner_changed"
        name = <value optimised out>
#1 0x0017739c in g_cclosure_marshal_VOID__PARAM (closure=0x8a93dd8, return_value=0x0, n_param_values=2, param_values=0x89c7078, invocation_hint=0xbfa98030, marshal_data=0x0) at /build/buildd/glib2.0-2.27.93/gobject/gmarshal.c:533
        callback = 0xf91a10 <watcher_owner_changed>
        cc = 0x8a93dd8
        data1 = 0x8a59e00
        data2 = 0x89c8d20
        __PRETTY_FUNCTION__ = "g_cclosure_marshal_VOID__PARAM"
#2 0x001594b2 in g_closure_invoke (closure=0x8a93dd8, return_value=0x0, n_param_values=2, param_values=0x89c7078, invocation_hint=0xbfa98030) at /build/buildd/glib2.0-2.27.93/gobject/gclosure.c:767
        marshal = 0x177300 <g_cclosure_marshal_VOID__PARAM>
        marshal_data = 0x0
        in_marshal = 16503552
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#3 0x0016d228 in signal_emit_unlocked_R (node=0x89012f8, detail=1243, instance=0x8a59e00, emission_return=0x0, instance_and_params=0x89c7078) at /build/buildd/glib2.0-2.27.93/gobject/gsignal.c:3252
        tmp = <value optimised out>
        handler = 0x8a8d340
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x8a59e00, ihint = {signal_id = 1, detail = 1243, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x8901470
        handler_list = 0x8a8d340
        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 = 1
        max_sequential_handler_number = 775
        return_value_altered = 1
#4 0x00175f65 in g_signal_emit_valist (instance=0x8a59e00, signal_id=1, detail=1243, var_args=0xbfa981e0 "$\025'") at /build/buildd/glib2.0-2.27.93/gobject/gsignal.c:2983
        instance_and_params = 0x89c7078
        signal_return_type = 4
        param_values = 0x89c708c
        node = 0x89012f8
        i = <value optimised out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#5 0x00176142 in g_signal_emit (instance=0x8a59e00, signal_id=1, detail=1243) at /build/buildd/glib2.0-2.27.93/gobject/gsignal.c:3040
        var_args = 0xbfa981dc "xd\234\b$\025'"
#6 0x0015b3a1 in g_object_dispatch_properties_changed (object=0x8a59e00, n_pspecs=1, pspecs=0xbfa98270) at /build/buildd/glib2.0-2.27.93/gobject/gobject.c:925
        i = <value optimised out>
#7 0x0015a52f in g_object_notify_dispatcher (object=0x8a59e00, n_pspecs=1, pspecs=0xbfa98270) at /build/buildd/glib2.0-2.27.93/gobject/gobject.c:330
No locals.
#8 0x0015d9c1 in g_object_notify_queue_thaw (object=0x8a59e00, property_name=0xe9acbc "g-name-owner") at /build/buildd/glib2.0-2.27.93/gobject/gobjectnotifyqueue.c:132
        context = 0x194400
        pspecs_mem = {0x89c6478, 0x2, 0xbfa982d8, 0x270ff4, 0x8a96fa8, 0xa51ff4, 0xa533c0, 0x8a96fa8, 0xbfa982a8, 0x965c8d, 0x0, 0xbfa982ac, 0x270ff4, 0x8a86e00, 0x1, 0x1}
        pspecs = <value optimised out>
        free_me = 0x0
        slist = <value optimised out>
        n_pspecs = <value optimised out>
#9 g_object_notify_by_spec_internal (object=0x8a59e00, property_name=0xe9acbc "g-name-owner") at /build/buildd/glib2.0-2.27.93/gobject/gobject.c:983
        nqueue = 0x1
#10 g_object_notify (object=0x8a59e00, property_name=0xe9acbc "g-name-owner") at /build/buildd/glib2.0-2.27.93/gobject/gobject.c:1024
        pspec = 0x194400
        __PRETTY_FUNCTION__ = "g_object_notify"
#11 0x00e558f0 in on_name_owner_changed (connection=0x894b0c8, sender_name=0x8a917d0 "org.freedesktop.DBus", object_path=0x89d4c60 "/org/freedesktop/DBus", interface_name=0x8a92270 "org.freedesktop.DBus", signal_name=0x89d4be0 "NameOwnerChanged", parameters=0x8a96fa8, user_data=0x8a59e00) at /build/buildd/glib2.0-2.27.93/gio/gdbusproxy.c:1023
        proxy = 0x8a59e00
        old_owner = 0x897116e ":1.1181"
        new_owner = 0x8971176 ""
        __PRETTY_FUNCTION__ = "on_name_owner_changed"
#12 0x00e42d70 in emit_signal_instance_in_idle_cb (data=0x8a7dbd8) at /build/buildd/glib2.0-2.27.93/gio/gdbusconnection.c:3400
        signal_instance = 0x8a7dbd8
        parameters = 0x8a96fa8
        has_subscription = 1
#13 0x001d7501 in g_idle_dispatch (source=0x8a967f0, callback=0xe42cd0 <emit_signal_instance_in_idle_cb>, user_data=0x8a7dbd8) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:4536
No locals.
#14 0x001dbcb8 in g_main_dispatch (context=0x8915c20) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:2440
        dispatch = 0x1d74e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x8a7dbd8
        callback = 0xe42cd0 <emit_signal_instance_in_idle_cb>
        cb_funcs = 0x27133c
        cb_data = 0x8a91390
        current_source_link = {data = 0x8a967f0, next = 0x0}
        need_destroy = <value optimised out>
        source = 0x8a967f0
        current = 0x89546a0
        i = <value optimised out>
#15 g_main_context_dispatch (context=0x8915c20) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3013
No locals.
#16 0x001dc480 in g_main_context_iterate (context=0x8915c20, block=2017744, dispatch=1, self=<value optimised out>) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3091
        max_priority = 2147483647
        timeout = 1456
        some_ready = 1
        nfds = <value optimised out>
        allocated_nfds = <value optimised out>
        fds = 0x8a57740
#17 0x001dcb43 in g_main_loop_run (loop=0x89b0330) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#18 0x004729c9 in IA__gtk_main () at /build/buildd/gtk+2.0-2.24.0/gtk/gtkmain.c:1244
        tmp_list = <value optimised out>
        functions = 0x0
        init = <value optimised out>
        loop = 0x89b0330
#19 0x0804b654 in main ()
No symbol table info available.

it displays that warning before crashing "GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `AppIndicator'"

[Sebastien Bacher (seb128)]

ok, that seems to have been fixed along with bug #711749, closing it