#0  QMetaObject::activate (sender=0x0, signalOffset=3,
    local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3364
#1  0x411e5630 in shell_surface_pong (this=0x1df2088,
    resource=<optimized out>, serial=<optimized out>)
    at wayland_wrapper/qwlshellsurface.cpp:291
#2  QtWayland::ShellSurface::shell_surface_pong (this=0x1df2088,
    resource=<optimized out>,
    serial=<error reading variable: Cannot access memory at address 0xffffffe7>) at wayland_wrapper/qwlshellsurface.cpp:285
#3  0x411f5bac in QtWaylandServer::wl_shell_surface::handle_pong (
    client=<optimized out>, resource=<optimized out>, serial=<optimized out>)
    at qwayland-server-wayland.cpp:1585
#4  0x4500aa18 in ffi_call_VFP () at ../src/arm/sysv.S:389
#5  0x4500b14c in ffi_call (cif=0xbee9de4c,
    fn=0x411f5b94 <QtWaylandServer::wl_shell_surface::handle_pong(wl_client*, wl_resource*, unsigned int)>, rvalue=0x0, avalue=<optimized out>)
    at ../src/arm/ffi.c:235
#6  0x44357124 in wl_closure_invoke (closure=<optimized out>,
    flags=<optimized out>, target=0x1c4e870, opcode=0, data=0x1ba4c88)
    at connection.c:887
#7  0x44352dd8 in wl_client_connection_data (fd=<optimized out>,
    mask=<optimized out>, data=0x1ba4c88) at wayland-server.c:280
#8  0x44355390 in wl_event_source_fd_dispatch (source=<optimized out>,
    ep=<optimized out>) at event-loop.c:86
#9  0x44355a3c in wl_event_loop_dispatch (loop=0x13a5230,
    timeout=<optimized out>) at event-loop.c:421
#10 0x411dbf68 in QtWayland::Compositor::processWaylandEvents (this=0x13a5168)
    at wayland_wrapper/qwlcompositor.cpp:286
#11 0x41d4d86c in QMetaObject::activate (sender=0x1345618,
    signalOffset=<optimized out>, local_signal_index=<optimized out>,
    argv=0xbee9e1e0) at kernel/qobject.cpp:3479
#12 0x41db6300 in QSocketNotifier::activated (this=<optimized out>,
    _t1=1104896768) at .moc/release-shared/moc_qsocketnotifier.cpp:132
#13 0x41d59090 in QSocketNotifier::event (this=0x1400fd0, e=0xbee9e334)
    at kernel/qsocketnotifier.cpp:301
#14 0x41d23fcc in QCoreApplicationPrivate::notify_helper (this=0x1345618,
    receiver=0x1400fd0, event=0xbee9e334) at kernel/qcoreapplication.cpp:992
#15 0x41d24024 in QCoreApplication::notify (this=<optimized out>,
    receiver=<optimized out>, event=<optimized out>)
    at kernel/qcoreapplication.cpp:937
#16 0x41d23cb8 in QCoreApplication::notifyInternal (this=0xbee9e498,
    receiver=<optimized out>, event=0xbee9e334)
    at kernel/qcoreapplication.cpp:875
#17 0x41d6f7a0 in sendEvent (event=0xbee9e32c, receiver=<optimized out>)
    at ../../src/corelib/kernel/qcoreapplication.h:232
#18 socketNotifierSourceDispatch (source=0x1348a60)
    at kernel/qeventdispatcher_glib.cpp:109
#19 0x42b4aeac in g_main_dispatch (context=0x13466d0) at gmain.c:3066
#20 g_main_context_dispatch (context=0x13466d0) at gmain.c:3642
#21 0x42b4b068 in g_main_context_iterate (context=0x13466d0, block=1,
    dispatch=1, self=<optimized out>) at gmain.c:3713
#22 0x42b4b16c in g_main_context_iterate (self=<optimized out>, dispatch=1,
    block=1, context=0x13466d0) at gmain.c:3680
#23 g_main_context_iteration (context=0x13466d0, may_block=1) at gmain.c:3774
#24 0x41d6f264 in QEventDispatcherGlib::processEvents (this=0x1346998,
    flags=...) at kernel/qeventdispatcher_glib.cpp:432
#25 0x41d225e0 in QEventLoop::processEvents (this=<optimized out>, flags=...)
    at kernel/qeventloop.cpp:136
#26 0x41d22a10 in QEventLoop::exec (this=0xbee9e468, flags=...)
    at kernel/qeventloop.cpp:212
#27 0x41d29414 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1128