The unit test vcard/test-avatar-tokens.py makes Gabble crash.

Tested with Gabble master (99d02aca906087861dfab9dd4dde252957d53386).

100% reproductible.


  File "./vcard/test-avatar-tokens.py", line 55, in test
    conn.Disconnect()

(telepathy-gabble:31119): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
GLib-GObject-CRITICAL **: g_signal_handlers_destroy: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
aborting...

#0  IA__g_logv (log_domain=0x2b2a776a92fc "GLib-GObject", 
    log_level=G_LOG_LEVEL_CRITICAL, 
    format=0x2b2a77d9c567 "%s: assertion `%s' failed", args1=0x7fff33d0b160)
    at gmessages.c:503
#1  0x00002b2a77d49d83 in IA__g_log (log_domain=0x2b2a785f89e0 "", 
    log_level=2017228536, format=0x2677bf0 "") at gmessages.c:517
#2  0x00002b2a77682ffd in g_object_real_dispose (object=0x2b2a785f89e0)
    at gobject.c:739
#3  0x00002b2a77683292 in IA__g_object_unref (_object=<value optimized out>)
    at gobject.c:2393
#4  0x00002b2a77d323e2 in g_hash_table_remove_all_nodes (hash_table=0x26744f0, 
    notify=1) at ghash.c:374
#5  0x00002b2a77d32c48 in IA__g_hash_table_remove_all (hash_table=0x26744f0)
    at ghash.c:1051
#6  0x00002b2a77d32df5 in IA__g_hash_table_destroy (hash_table=0x2b2a785f89e0)
    at ghash.c:758
#7  0x000000000042d215 in gabble_roster_close_all (self=0x2670c20)
    at roster.c:1705
#8  0x00002b2a776811dd in IA__g_closure_invoke (closure=0x2676150, 
    return_value=0x0, n_param_values=3, param_values=0x2684280, 
    invocation_hint=0x7fff33d0b440) at gclosure.c:767
#9  0x00002b2a77698240 in signal_emit_unlocked_R (node=0x266bf90, detail=0, 
    instance=0x2672120, emission_return=0x0, instance_and_params=0x2684280)
    at gsignal.c:3244
#10 0x00002b2a77699929 in IA__g_signal_emit_valist (instance=0x2672120, 
    signal_id=<value optimized out>, detail=0, var_args=0x7fff33d0b620)
    at gsignal.c:2977
#11 0x00002b2a77699e53 in IA__g_signal_emit (instance=0x2b2a785f89e0, 
    signal_id=2017228536, detail=40336368) at gsignal.c:3034
#12 0x00002b2a7800af83 in tp_base_connection_change_status (self=0x2672120, 
    status=<value optimized out>, reason=TP_CONNECTION_STATUS_REASON_REQUESTED)
    at base-connection.c:2656
#13 0x00002b2a771e0847 in gobject_message_function (connection=0x2664c60, 
    message=0x26667d0, user_data=<value optimized out>) at dbus-gobject.c:1284
#14 0x00002b2a77425ad9 in _dbus_object_tree_dispatch_and_unlock (
    tree=0x2664910, message=0x26667d0) at dbus-object-tree.c:856
#15 0x00002b2a77410b9f in dbus_connection_dispatch (connection=0x2664c60)
    at dbus-connection.c:4447
#16 0x00002b2a771dd3a5 in message_queue_dispatch (
    source=<value optimized out>, callback=<value optimized out>, 
    user_data=<value optimized out>) at dbus-gmain.c:101
#17 0x00002b2a77d3fc9b in IA__g_main_context_dispatch (context=0x26606d0)
    at gmain.c:1814
#18 0x00002b2a77d4344d in g_main_context_iterate (context=0x26606d0, block=1, 
    dispatch=1, self=<value optimized out>) at gmain.c:2448
#19 0x00002b2a77d4397d in IA__g_main_loop_run (loop=0x265afc0) at gmain.c:2656
#20 0x00002b2a7806e5c6 in tp_run_connection_manager (
    prog_name=0x465748 "telepathy-gabble", version=0x462bda "0.7.15.1", 
    construct_cm=0x416da0 <construct_cm>, argc=<value optimized out>, 
    argv=<value optimized out>) at run.c:261
#21 0x00002b2a782c81a6 in __libc_start_main () from /lib/libc.so.6
#22 0x000000000040fcb9 in _start ()