#0 0xb670a2d0 in cv::CvtColorLoop_Invoker<cv::RGB2Gray<unsigned char> >:perator()(cv::Range const&) const () from ./qslib/libopencv_world.so
#1 0xb6517108 in cv::ForThread::thread_loop_wrapper(void*) () from ./qslib/libopencv_world.so
#2 0xb58f64ac in start_thread (arg=0x0) at pthread_create.c:335
#3 0xb56e8e1c in ?? () at ../sysdeps/unix/sysv/linux/arm/clone.S:89 from /lib/arm-linux-gnueabihf/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)