#0  0xb5d638a0 in pthread_cond_wait () from /lib/libpthread.so.0
#1  0xb5e036ac in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5
#2  0xb6a36e76 in ?? () from /usr/lib/libQt5Quick.so.5
#3  0xb6a36e76 in ?? () from /usr/lib/libQt5Quick.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

#0  0xb5bceedc in poll () from /lib/libc.so.6
#1  0xb5909de0 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0xb5909f28 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0xb6010488 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#4  0xb5fbc7c4 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#5  0xb5fbcbf4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#6  0xb5fc3a44 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#7  0x0001bba0 in ?? ()
#8  0xb5b1aed4 in __libc_start_main () from /lib/libc.so.6
#9  0x0001c464 in ?? ()
Cannot access memory at address 0x0
#10 0x0001c464 in ?? ()