Crash fix when using the runtime graphics system on Symbian.

If QWidget::destroy() is called (perhaps by setParent) then the window
surface is deleted by the destructor of QSymbianControl instead of in
the "normal" place which is ~QWidget(). This means that we should not
attempt to use the RWindow in the window surface because it is in the
process of being destroyed.

Reviewed-by: Jani Hautakangas

1 files changed, 5 insertions, 3 deletions

diff --git a/src/gui/painting/qwindowsurface_s60.cpp b/src/gui/painting/qwindowsurface_s60.cpp
index 8bac1f5..ea19fcd 100644
--- a/src/gui/painting/qwindowsurface_s60.cpp
+++ b/src/gui/painting/qwindowsurface_s60.cpp
@@ -101,9 +101,11 @@ QS60WindowSurface::~QS60WindowSurface()
             // Issue empty redraw to clear the UI surface
 
             QWidget *w = window();
-            RWindow *const window = static_cast<RWindow *>(w->winId()->DrawableWindow());
-            window->BeginRedraw();
-            window->EndRedraw();
+            if (w->testAttribute(Qt::WA_WState_Created)) {
+                RWindow *const window = static_cast<RWindow *>(w->winId()->DrawableWindow());
+                window->BeginRedraw();
+                window->EndRedraw();
+            }
         }
     }
 #endif