1 files changed, 6 insertions, 1 deletions
diff --git a/src/plugins/platforms/qnx/qqnxwindow.cpp b/src/plugins/platforms/qnx/qqnxwindow.cpp
index 321a5ed6da..fe66d547f3 100644
--- a/src/plugins/platforms/qnx/qqnxwindow.cpp
+++ b/src/plugins/platforms/qnx/qqnxwindow.cpp
@@ -75,9 +75,9 @@ QT_BEGIN_NAMESPACE
 QQnxWindow::QQnxWindow(QWindow *window, screen_context_t context, bool needRootWindow)
     : QPlatformWindow(window),
       m_screenContext(context),
-      m_parentWindow(0),
       m_window(0),
       m_screen(0),
+      m_parentWindow(0),
       m_visible(false),
       m_exposed(true),
       m_windowState(Qt::WindowNoState),
@@ -380,6 +380,11 @@ void QQnxWindow::setParent(const QPlatformWindow *window)
     if (newParent == m_parentWindow)
         return;
 
+    if (screen()->rootWindow() == this) {
+        qWarning() << "Application window cannot be reparented";
+        return;
+    }
+
     removeFromParent();
     m_parentWindow = newParent;