#include <QOpenGLFunctions_4_5_Core>

void CopyCoreObjects()
{
	{
		QOpenGLFunctions_4_5_Core coreObject1;
		{
			QOpenGLFunctions_4_5_Core coreObject2 = coreObject1;

		}  // OK, calls ~QOpenGLFunctions_4_5_Core().

	} // Crash!
}

Is this a known issue? We would suggest preventing accidental copying QOpenGLFunctions Core objects by marking the copy-constructor and the assignment-operator with C++11 "= delete".