I have a Qt 5.2.1 program that uses QOpenGLVertexArrayObjects and creates more than one QGLWidget, each placed inside of a QStackedWidget. Thus, only one QGLWidget is visible at any one time.

The issue is -- if I close the program and the QGLWidget that uses a QOpenGLVertexArrayObject ISN'T currently visible, it crashes with the message:

Warning: QOpenGLVertexArrayObject::~QOpenGLVertexArrayObjec t() failed to make VAO's context current (opengl/qopenglvertexarrayobject.cpp:370, virtual QOpenGLVertexArrayObject::~QOpenGLVertexArrayObjec t())
Looking through the source code, the destructor of QOpenGLVertexArrayObject contains the following code:

Qt Code: 
  1. /*!
  2.     Destroys the QOpenGLVertexArrayObject and the underlying OpenGL resource.
  3. */
  4. QOpenGLVertexArrayObject::~QOpenGLVertexArrayObject()
  5. {
  6.     QOpenGLContext* ctx = QOpenGLContext::currentContext();
  7.  
  8.     Q_D(QOpenGLVertexArrayObject);
  9.     QOpenGLContext *oldContext = 0;
  10.     if (d->context && ctx && d->context != ctx) {
  11.         oldContext = ctx;
  12.         if (d->context->makeCurrent(oldContext->surface())) {
  13.             ctx = d->context;
  14.         } else {
  15.             qWarning("QOpenGLVertexArrayObject::~QOpenGLVertexArrayObject() failed to make VAO's context current");
  16.             ctx = 0;
  17.         }
  18.     }
  19.  
  20.     if (ctx)
  21.         destroy();
  22.  
  23.     if (oldContext) {
  24.         if (!oldContext->makeCurrent(oldContext->surface()))
  25.             qWarning("QOpenGLVertexArrayObject::~QOpenGLVertexArrayObject() failed to restore current context");
  26.     }
  27. }
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- Is it possible to use QOpenGLVertexArrayObjects in a QGLWidget that's not currently visible and close the program successfully?

- Is this a bug?