I built telepathy-gabble with DEB_BUILD_OPTIONS="noopt nostrip" and got the following complete backtrace:

#0  0x00000000004aee0f in gabble_request_pipeline_enqueue (pipeline=0x0, 
    msg=0x126c400, timeout=180, callback=0x4bf90d <pipeline_reply_cb>, 
    user_data=0x18e5a10) at request-pipeline.c:406
        priv = 0x1892ac0
        item = 0x122a900
        __PRETTY_FUNCTION__ = "gabble_request_pipeline_enqueue"
#1  0x00000000004bffff in request_send (request=0x18e5a10, timeout=180)
    at vcard-manager.c:1519
        jid = 0x18c7230 "bobdobbs@2entwine.net"
        msg = 0x126c400
        entry = 0x1892ac0
        conn = 0x125a0d0
        base = 0x125a0d0
        contact_repo = 0x1239460
        __PRETTY_FUNCTION__ = "request_send"
#2  0x00000000004c01fc in gabble_vcard_manager_request (self=0x1255430, 
    handle=31, timeout=180, callback=0, user_data=0x0, object=0x125a0d0)
    at vcard-manager.c:1579
        priv = 0x1255450
        connection = 0x125a0d0
        contact_repo = 0x1239460
        request = 0x18e5a10
        entry = 0x1892ac0
        __PRETTY_FUNCTION__ = "gabble_vcard_manager_request"
#3  0x0000000000470eb2 in aliases_request_basic_pep_cb (self=0x125a0d0, 
    msg=0x0, user_data=0x1f, error=0x7fffcb695f30) at conn-aliasing.c:259
        source = GABBLE_CONNECTION_ALIAS_FROM_JID
        handle = 31
#4  0x0000000000471135 in pep_request_cb (conn=0x125a0d0, msg=0x0, 
    user_data=0x18e4980, error=0x7fffcb695f30) at conn-aliasing.c:326
        ctx = 0x18e4980
#5  0x00000000004ae79b in gabble_request_pipeline_dispose (object=0x122a900)
    at request-pipeline.c:247
        self = 0x122a900
        priv = 0x122a920
        disconnected = {domain = 626, code = 5, 
          message = 0x5430e0 "Request failed because connection became disconnected"}
        item = 0x1935b60
        __PRETTY_FUNCTION__ = "gabble_request_pipeline_dispose"
#6  0x00007f653eee8d8a in g_object_unref () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#7  0x0000000000474f66 in gabble_connection_dispose (object=0x125a0d0)
    at connection.c:1105
        _tp_clear_pointer_tmp = 0x122a900
        self = 0x125a0d0
        base = 0x125a0d0
        priv = 0x125a2e0
        __PRETTY_FUNCTION__ = "gabble_connection_dispose"
#8  0x00007f653eee8d8a in g_object_unref () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#9  0x00000000004f67ce in pep_reply_cb (source=0x126c190, res=0x129d120, 
    user_data=0x125a0d0) at conn-location.c:106
        conn = 0x125a0d0
        reply_msg = 0x0
        error = 0x18d66b0
        from = 0x122fac0 ""
        __PRETTY_FUNCTION__ = "pep_reply_cb"
#10 0x00000000004cf334 in send_query_cb (source=0x15703c0, res=0x129d180, 
    user_data=0x129d120) at wocky-pep-service.c:296
        result = 0x129d120
        error = 0x18d6640
        reply = 0x0
#11 0x00007f653f3acbb9 in ?? () from /usr/lib/libgio-2.0.so.0
No symbol table info available.
#12 0x00007f653e420342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
No symbol table info available.
#13 0x00007f653e4242a8 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#14 0x00007f653e4247b5 in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#15 0x00007f653f97d4cf in tp_run_connection_manager ()
   from /usr/lib/libtelepathy-glib.so.0
No symbol table info available.
#16 0x000000000042e2c3 in gabble_main (argc=1, argv=0x7fffcb696418)
    at gabble.c:150
        loader = 0x1229af0
        out = 0
#17 0x000000000042df59 in main (argc=1, argv=0x7fffcb696418) at main.c:28