.
Thread 2 (Thread 1693):
#0  0x00007f38cae76f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007f38cb39e104 in g_main_context_poll (context=0x2441cf0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3404
        poll_func = 0x7f38cb3ae130 <g_poll>
#2  g_main_context_iterate (context=0x2441cf0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 1
        allocated_nfds = <value optimized out>
        fds = 0x2443ac0
#3  0x00007f38cb39e9f2 in g_main_loop_run (loop=0x2441cd0) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f38cd256d44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./gio/gdbusprivate.c:276
No locals.
#5  0x00007f38cb3c53e4 in g_thread_create_proxy (data=0x2441dd0) at /build/buildd/glib2.0-2.28.5/./glib/gthread.c:1897
        thread = 0x2441dd0
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007f38ca919d8c in start_thread (arg=0x7f38c3a47700) at pthread_create.c:304
        pd = 0x7f38c3a47700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139881777231616, -2367012078804965688, 140735407149264, 139881777232320, 0, 3, 2402433211627300552, 2402452891666310856}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007f38cae8404d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 1689):
#0  0x0000000000415baf in remove_frame_window ()
No symbol table info available.
#1  0x00000000024b9470 in ?? ()
No symbol table info available.
#2  0x0000000000000002 in ?? ()
No symbol table info available.
#3  0x00007f38cbc6981c in g_closure_invoke (closure=0x242d9d0, return_value=0x0, n_param_values=38928704, param_values=0x23ac460, invocation_hint=0x7fff83f34fe0) at /build/buildd/glib2.0-2.28.5/./gobject/gclosure.c:767
        marshal = <value optimized out>
        marshal_data = <value optimized out>
        in_marshal = 0
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#4  0x00007f38cbc7b019 in signal_emit_unlocked_R (node=<value optimized out>, detail=0, instance=0x242e000, emission_return=0x0, instance_and_params=0x24b9470) at /build/buildd/glib2.0-2.28.5/./gobject/gsignal.c:3252
        tmp = <value optimized out>
        handler = 0x2432cf0
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x242e000, ihint = {signal_id = 150, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x242bb90
        handler_list = 0x2432cf0
        return_accu = 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 = 150
        max_sequential_handler_number = 410
        return_value_altered = 0
#5  0x00007f38cbc84258 in g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./gobject/gsignal.c:2983
        instance_and_params = 0x24b9470
        signal_return_type = 4
        param_values = 0x24b9488
        node = 0x242bc00
        i = <value optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#6  0x00007f38cbc8441f in g_signal_emit (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./gobject/gsignal.c:3040
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff83f352d0, reg_save_area = 0x7fff83f35210}}
#7  0x00007f38cdffbd44 in emit_window_closed (screen=<value optimized out>) at screen.c:2417
No locals.
#8  update_client_list (screen=<value optimized out>) at screen.c:1771
        window = <value optimized out>
        mapping = 0x250e0c0
        created_class_groups = <value optimized out>
        reentrancy_guard = 1
        mapping_length = 7
        created = <value optimized out>
        new_hash = <value optimized out>
        active_changed = 1
        new_list = <value optimized out>
        closed = <value optimized out>
        closed_class_groups = <value optimized out>
        list_changed = <value optimized out>
        stack = 0x25165c0
        tmp = 0x24f8240
        i = <value optimized out>
        stack_length = 7
        new_stack_list = <value optimized out>
        created_apps = <value optimized out>
        closed_apps = <value optimized out>
        stack_changed = 1
#9  do_update_now (screen=<value optimized out>) at screen.c:2332
No locals.
#10 0x00007f38cdffc3d4 in update_idle (data=<value optimized out>) at screen.c:2355
        screen = <value optimized out>
#11 0x00007f38cb39dbcd in g_main_dispatch (context=0x23c3390) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:2440
        dispatch = 0x7f38cb3994e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x242e000
        callback = 0x7f38cdffc3c0 <update_idle>
        cb_funcs = 0x7f38cb648630
        cb_data = 0x23c18a0
        current_source_link = {data = 0x2520010, next = 0x0}
        need_destroy = <value optimized out>
        source = 0x2520010
        current = 0x240dcc0
        i = <value optimized out>
#12 g_main_context_dispatch (context=0x23c3390) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3013
No locals.
#13 0x00007f38cb39e3a8 in g_main_context_iterate (context=0x23c3390, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3091
        max_priority = 200
        timeout = 0
        some_ready = 1
        nfds = 6
        allocated_nfds = <value optimized out>
        fds = <value optimized out>
#14 0x00007f38cb39e9f2 in g_main_loop_run (loop=0x24d3780) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#15 0x00007f38cdad7a37 in IA__gtk_main () at /build/buildd/gtk+2.0-2.24.4/gtk/gtkmain.c:1257
        tmp_list = <value optimized out>
        functions = 0x0
        init = <value optimized out>
        loop = 0x24d3780
#16 0x0000000000409822 in main ()
No symbol table info available.