#0  _dbus_connection_lock (connection=0xffffffffffff) at dbus-connection.c:355
  [Error: dbus-connection.c was not found in source tree]
#1  0x00007f068bb80c8d in _dbus_pending_call_get_connection_and_lock (
#2  0x00007f068bb72dce in reply_handler_timeout (data=0xffffffffffff)
#3  0x00007f0694096e13 in QDBusConnectionPrivate::timerEvent (this=0x2498720, 
#4  0x00007f069468e4a3 in QObject::event (this=0x2498720, e=0x7fff2e099760)
#5  0x00007f0692e77f2c in QApplicationPrivate::notify_helper (this=0x240bf10, 
#6  0x00007f0692e7e53d in QApplication::notify (this=0x7fff2e099c20, 
#7  0x00007f069467eabc in QCoreApplication::notifyInternal (
#8  0x00007f06946ab7a2 in QTimerInfoList::activateTimers (this=0x240fc80)
#9  0x00007f06946a8388 in idleTimerSourceDispatch (
#10 0x00007f0691b77d4e in g_main_context_dispatch ()
#11 0x00007f0691b7b718 in ?? () from /lib/libglib-2.0.so.0
#12 0x00007f0691b7b840 in g_main_context_iteration ()
#13 0x00007f06946a8053 in QEventDispatcherGlib::processEvents (
#14 0x00007f0692f263de in QGuiEventDispatcherGlib::processEvents (
#15 0x00007f069467d3e2 in QEventLoop::processEvents (
#16 0x00007f069467d7bc in QEventLoop::exec (this=0x7fff2e099a00, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
#17 0x00007f06946814fb in QCoreApplication::exec ()
#18 0x0000000000403adc in main (argc=2, argv=<value optimized out>)