Comment 3 for bug 86644

Debug backtrace for the crash:

#0 0xb5ffc447 in focus_removed (widget=0x0, event=0x0, win=0x8b02700)
    at ../../../gtk/plugins/markerline.c:99
 conv = <value optimized out>
 __PRETTY_FUNCTION__ = "focus_removed"
#1 0xb7c3055d in _gtk_marshal_VOID__POINTER_UINT ()
   from /usr/lib/libgtk-x11-2.0.so.0
#2 0xb79c862b in IA__g_closure_invoke (closure=0x91a3d30, return_value=0x0,
    n_param_values=3, param_values=0xbf87cc2c, invocation_hint=0xbf87cb3c)
    at gclosure.c:490
 marshal = (
    GClosureMarshal) 0xb7c30500 <_gtk_marshal_VOID__POINTER_UINT>
 marshal_data = (gpointer) 0x0
 __PRETTY_FUNCTION__ = "IA__g_closure_invoke"
#3 0xb79d90f3 in signal_emit_unlocked_R (node=0x825ec00, detail=0,
    instance=0x86df8b8, emission_return=0x0, instance_and_params=0xbf87cc2c)
    at gsignal.c:2440
 tmp = <value optimized out>
 handler = (Handler *) 0x91ab500
 accumulator = (SignalAccumulator *) 0x0
 emission = {next = 0xbf87d044, instance = 0x86df8b8, ihint = {
    signal_id = 100, detail = 0, run_type = G_SIGNAL_RUN_FIRST},
  state = EMISSION_RUN, chain_type = 4}
 class_closure = (GClosure *) 0x825ec30
 handler_list = (Handler *) 0x8b02280
 return_accu = (GValue *) 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 = 100
 max_sequential_handler_number = 22342
 return_value_altered = 1
#4 0xb79da617 in IA__g_signal_emit_valist (instance=0x86df8b8,
    signal_id=100, detail=0, var_args=0xbf87ce74 "��m\b\001")
    at gsignal.c:2199
...