Starting /home/roman/Qt5.2.0/5.2.0/gcc/examples/opengl/build-hellogl-Desktop_Qt_5_2_0_GCC_32bit-Debug/hellogl...
QBackingStore::flush() called for  QWidgetWindow(0x8d95a00, name = "QSliderClassWindow")  which does not have a handle. 
QBackingStore::flush() called for  QWidgetWindow(0x8dc11c0, name = "QSliderClassWindow")  which does not have a handle. 
QBackingStore::flush() called for  QWidgetWindow(0x8d951c0, name = "QSliderClassWindow")  which does not have a handle. 
QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined 
QBackingStore::flush() called for  QWidgetWindow(0x8d95a00, name = "QSliderClassWindow")  which does not have a handle. 
QBackingStore::flush() called for  QWidgetWindow(0x8dc11c0, name = "QSliderClassWindow")  which does not have a handle. 
QBackingStore::flush() called for  QWidgetWindow(0x8d951c0, name = "QSliderClassWindow")  which does not have a handle. 
QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined 
QBackingStore::flush() called for  QWidgetWindow(0x8d95a00, name = "QSliderClassWindow")  which does not have a handle. 
QBackingStore::flush() called for  QWidgetWindow(0x8dc11c0, name = "QSliderClassWindow")  which does not have a handle. 
QBackingStore::flush() called for  QWidgetWindow(0x8d951c0, name = "QSliderClassWindow")  which does not have a handle. 
QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined 
The program has unexpectedly finished.
/home/roman/Qt5.2.0/5.2.0/gcc/examples/opengl/build-hellogl-Desktop_Qt_5_2_0_GCC_32bit-Debug/hellogl crashed