#0  0xac9ccf80 in ?? ()
No symbol table info available.
#1  0xb691c6a0 in QQuickWindowPrivate::polishItems() () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
No symbol table info available.
#2  0xb6906e50 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)