stacktrace:

#0  g_hash_table_foreach (hash_table=0x0, func=0x7fe3f250d910 <hashtable_foreach_with_values>, user_data=0x7fff2a991d90) at /build/buildd/glib2.0-2.29.6/./glib/ghash.c:1343
#1  0x00007fe3f250dd7e in hashtable_iterator (hash_type=33380976, instance=0x0, iterator=0x7fe3f2509ea0 <marshal_map_entry>, user_data=0x7fff2a991e30) at dbus-gvalue-utils.c:608
#2  0x00007fe3f2509192 in marshal_map (iter=0x7fff2a991e90, value=0x7fe3e009d420) at dbus-gvalue.c:1716
#3  0x00007fe3f2502c15 in dbus_g_proxy_marshal_args_to_message (proxy=<value optimized out>, method=0x7fe3f29896f3 "AddAndActivateConnection", args=0x210e800) at dbus-gproxy.c:2244
#4  0x00007fe3f2502cc1 in dbus_g_proxy_begin_call_internal (proxy=0x1dde550, method=0x7fe3f29896f3 "AddAndActivateConnection", 
    notify=0x7fe3f29708d0 <org_freedesktop_NetworkManager_add_and_activate_connection_async_callback>, user_data=0x20b0bb0, destroy=0x7fe3f29708c0 <_dbus_glib_async_data_free>, args=<value optimized out>, 
    timeout=-1) at dbus-gproxy.c:2277
#5  0x00007fe3f25056c2 in dbus_g_proxy_begin_call (proxy=0x1dde550, method=0x7fe3f29896f3 "AddAndActivateConnection", 
    notify=0x7fe3f29708d0 <org_freedesktop_NetworkManager_add_and_activate_connection_async_callback>, user_data=0x20b0bb0, destroy=0x7fe3f29708c0 <_dbus_glib_async_data_free>, 
    first_arg_type=<value optimized out>) at dbus-gproxy.c:2531
#6  0x00007fe3f29726e9 in org_freedesktop_NetworkManager_add_and_activate_connection_async (client=<value optimized out>, partial=<value optimized out>, device=<value optimized out>, 
    specific_object=<value optimized out>, callback=<value optimized out>, user_data=0x1d9a220) at nm-client-bindings.h:175
#7  nm_client_add_and_activate_connection (client=<value optimized out>, partial=<value optimized out>, device=<value optimized out>, specific_object=<value optimized out>, callback=<value optimized out>, 
    user_data=0x1d9a220) at nm-client.c:772
#8  0x0000000000417cdd in applet_menu_item_activate_helper_new_connection (connection=<value optimized out>, auto_created=<value optimized out>, canceled=<value optimized out>, user_data=0x7fe3e0018a70)
    at applet.c:525
#9  0x000000000042b319 in wireless_new_auto_connection (device=<value optimized out>, dclass_data=<value optimized out>, callback=<value optimized out>, callback_data=<value optimized out>)
    at applet-device-wifi.c:539
#10 0x0000000000418a02 in applet_menu_item_activate_helper (device=0x1e110a0, connection=<value optimized out>, specific_object=<value optimized out>, applet=0x1d9a220, dclass_data=0x7fe3e0047140)
    at applet.c:604
#11 0x00007fe3f1e4eda4 in g_closure_invoke (closure=0x7fe3e0044ed0, return_value=0x0, n_param_values=1, param_values=0x210fee0, invocation_hint=<value optimized out>)
    at /build/buildd/glib2.0-2.29.6/./gobject/gclosure.c:771
#12 0x00007fe3f1e60ccb in signal_emit_unlocked_R (node=<value optimized out>, detail=0, instance=0x2112e70, emission_return=0x0, instance_and_params=0x210fee0)
    at /build/buildd/glib2.0-2.29.6/./gobject/gsignal.c:3256
#13 0x00007fe3f1e6a2d7 in g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=0x7fff2a992508)
    at /build/buildd/glib2.0-2.29.6/./gobject/gsignal.c:2987
#14 0x00007fe3f1e6a4a2 in g_signal_emit (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>) at /build/buildd/glib2.0-2.29.6/./gobject/gsignal.c:3044
#15 0x00007fe3f0e34bc8 in item_activated (item=<value optimized out>, timestamp=<value optimized out>, user_data=0x2112e70) at ../../libdbusmenu-gtk/parser.c:937
#16 0x00007fe3f1e4eda4 in g_closure_invoke (closure=0x7fe3e0089880, return_value=0x0, n_param_values=2, param_values=0x2005c60, invocation_hint=<value optimized out>)
    at /build/buildd/glib2.0-2.29.6/./gobject/gclosure.c:771
#17 0x00007fe3f1e60ccb in signal_emit_unlocked_R (node=<value optimized out>, detail=0, instance=0x20faaa0, emission_return=0x0, instance_and_params=0x2005c60)
    at /build/buildd/glib2.0-2.29.6/./gobject/gsignal.c:3256
#18 0x00007fe3f1e6a2d7 in g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=0x7fff2a992928)
    at /build/buildd/glib2.0-2.29.6/./gobject/gsignal.c:2987
#19 0x00007fe3f1e6a4a2 in g_signal_emit (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>) at /build/buildd/glib2.0-2.29.6/./gobject/gsignal.c:3044
#20 0x00007fe3f0c18c15 in dbusmenu_menuitem_handle_event (mi=0x20faaa0, name=0x7fe3e0095470 "clicked", variant=0x2007700, timestamp=314437) at /build/buildd/libdbusmenu-0.4.3/./libdbusmenu-glib/menuitem.c:1708
#21 0x00007fe3f0c1a1c7 in event_local_handler (user_data=0x7fe3e0095dc0) at /build/buildd/libdbusmenu-0.4.3/./libdbusmenu-glib/server.c:1500
#22 0x00007fe3f197703b in g_timeout_dispatch (source=0x7fe3e0079240, callback=<value optimized out>, user_data=<value optimized out>) at /build/buildd/glib2.0-2.29.6/./glib/gmain.c:3955
#23 0x00007fe3f197585d in g_main_dispatch (context=0x1d6c770) at /build/buildd/glib2.0-2.29.6/./glib/gmain.c:2477
#24 g_main_context_dispatch (context=0x1d6c770) at /build/buildd/glib2.0-2.29.6/./glib/gmain.c:3050
#25 0x00007fe3f1976058 in g_main_context_iterate (context=0x1d6c770, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.29.6/./glib/gmain.c:3128
#26 0x00007fe3f1976592 in g_main_loop_run (loop=0x1d96a50) at /build/buildd/glib2.0-2.29.6/./glib/gmain.c:3336
#27 0x0000000000415d97 in main (argc=1, argv=0x7fff2a992cd8) at main.c:106