Comment 8 for bug 1102394

This crash happens if empathy-auth-client crash while doing the facebook auth, which cause the channel to be closed, then wocky receive the challenge and assert:

(telepathy-gabble:1192): wocky-DEBUG: Writing xml: <auth wocky-zb:client-uses-full-bind-result="true" mechanism="X-FACEBOOK-PLATFORM" xmlns:wocky-zb="http://www.google.com/talk/protocol/auth" xmlns="urn:ietf:params:xml:ns:xmpp-sasl"/>
(telepathy-gabble:1192): tp-glib/channel-DEBUG: tp_base_channel_close_dbus: called by :1.184
(telepathy-gabble:1192): gabble-DEBUG: gabble_server_tls_channel_close (server-tls-channel.c:305): Close() called on the TLS channel 0x10a6a40
(telepathy-gabble:1192): gabble-DEBUG: server_tls_channel_closed_cb (server-tls-manager.c:197): Server TLS channel closed.
(telepathy-gabble:1192): gabble-DEBUG: gabble_server_tls_channel_dispose (server-tls-channel.c:144): Dispose TLS channel
(telepathy-gabble:1192): gabble-DEBUG: gabble_server_tls_channel_finalize (server-tls-channel.c:127): Finalize TLS channel
(telepathy-gabble:1192): tp-glib/channel-DEBUG: tp_base_channel_close_dbus: called by :1.184
(telepathy-gabble:1192): gabble-DEBUG: gabble_server_sasl_channel_close (server-sasl-channel.c:958): called on 0x10a6ad0
(telepathy-gabble:1192): wocky-DEBUG: Parsing chunk: <challenge xmlns="urn:ietf:params:xml:ns:xmpp-sasl">dmVyc2lvbj0xJm1ldGhvZD1hdXRoLnhtcHBfbG9naW4mbm9uY2U9QkYxNjRFMDE1OTkxRjdBQkIzMUIyOUYxQzAxNTUyQkU=</challenge>
(telepathy-gabble:1192): wocky-DEBUG: _end_element_ns: Received stanza
* challenge xmlns='urn:ietf:params:xml:ns:xmpp-sasl'
    "dmVyc2lvbj0xJm1ldGhvZD1hdXRoLnhtcHBfbG9naW4mbm9uY2U9QkYxNjRFMDE1OTkxRjdBQkIzMUIyOUYxQzAxNTUyQkU="
**
wocky:ERROR:wocky-auth-registry.c:426:wocky_auth_registry_challenge_async_func: assertion failed: (priv->handler != NULL)

Program received signal SIGABRT, Aborted.
0x00007ffff5b9f445 in raise () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0 0x00007ffff5b9f445 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff5ba2bab in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007ffff5f8ed97 in g_assertion_message (domain=domain@entry=0x7ffff730b93b "wocky", file=file@entry=0x7ffff730ba1a "wocky-auth-registry.c", line=line@entry=426,
    func=func@entry=0x7ffff730bde0 "wocky_auth_registry_challenge_async_func", message=<optimized out>) at /build/buildd/glib2.0-2.33.3/./glib/gtestutils.c:1861
#3 0x00007ffff5f8f2b4 in g_assertion_message_expr (domain=domain@entry=0x7ffff730b93b "wocky", file=file@entry=0x7ffff730ba1a "wocky-auth-registry.c", line=line@entry=426,
    func=func@entry=0x7ffff730bde0 "wocky_auth_registry_challenge_async_func", expr=expr@entry=0x7ffff730ba04 "priv->handler != NULL") at /build/buildd/glib2.0-2.33.3/./glib/gtestutils.c:1872
#4 0x00007ffff72d6b2e in wocky_auth_registry_challenge_async_func (self=<optimized out>, challenge_data=0x76b680, callback=0x7ffff72fbe70 <wocky_sasl_auth_response_cb>, user_data=0xafc980)
    at wocky-auth-registry.c:426
#5 0x00007ffff72fc17b in sasl_auth_stanza_received (source=<optimized out>, res=<optimized out>, user_data=user_data@entry=0xafc980) at wocky-sasl-auth.c:562
#6 0x00007ffff66e3fae in g_simple_async_result_complete (simple=0xa5f040) at /build/buildd/glib2.0-2.33.3/./gio/gsimpleasyncresult.c:767
#7 0x00007ffff73035e8 in _xmpp_connection_received_data (source=0x726040, result=0x7a9c20, user_data=<optimized out>) at wocky-xmpp-connection.c:562
#8 0x00007ffff66cebe4 in async_ready_callback_wrapper (source_object=0x726040, res=0x7a9c20, user_data=0xe29110) at /build/buildd/glib2.0-2.33.3/./gio/ginputstream.c:529
#9 0x00007ffff66e3fae in g_simple_async_result_complete (simple=0x7a9c20) at /build/buildd/glib2.0-2.33.3/./gio/gsimpleasyncresult.c:767
#10 0x00007ffff7307436 in wocky_tls_job_result_gssize (job=<optimized out>, result=160) at wocky-tls.c:369
#11 0x00007ffff66cebe4 in async_ready_callback_wrapper (source_object=0x7a9d70, res=0x75d070, user_data=0x742480) at /build/buildd/glib2.0-2.33.3/./gio/ginputstream.c:529
#12 0x00007ffff66e3fae in g_simple_async_result_complete (simple=0x75d070) at /build/buildd/glib2.0-2.33.3/./gio/gsimpleasyncresult.c:767
#13 0x00007ffff66e40dc in complete_in_idle_cb (data=0x75d070) at /build/buildd/glib2.0-2.33.3/./gio/gsimpleasyncresult.c:779
#14 0x00007ffff5f6d8b5 in g_main_dispatch (context=0x72be60) at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:2539
#15 g_main_context_dispatch (context=context@entry=0x72be60) at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:3075
#16 0x00007ffff5f6dbe8 in g_main_context_iterate (context=0x72be60, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>)
    at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:3146
#17 0x00007ffff5f6dfe2 in g_main_loop_run (loop=0x732270) at /build/buildd/glib2.0-2.33.3/./glib/gmain.c:3340
#18 0x00007ffff6ff0b52 in tp_run_connection_manager () from /usr/lib/x86_64-linux-gnu/libtelepathy-glib.so.0
#19 0x0000000000428c7c in gabble_main (argc=1, argv=0x7fffffffe068) at gabble.c:179
#20 0x00007ffff5b8a76d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#21 0x0000000000428899 in _start ()