From ce2815b43c3f10c474c35d30197e14c58c9106ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@qt.io>
Date: Fri, 19 Aug 2016 14:44:21 +0200
Subject: [PATCH] Guard against calling QWindow::requestUpdate() on non-GUI
 threads

Change-Id: I851ff672bc234146deb61615fc7c56df87d62065
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@theqtcompany.com>
---
 src/gui/kernel/qwindow.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 2e212e5fdb0..bcd29b6fe1f 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -2160,6 +2160,9 @@ void QWindowPrivate::deliverUpdateRequest()
 */
 void QWindow::requestUpdate()
 {
+    Q_ASSERT_X(QThread::currentThread() == QCoreApplication::instance()->thread(),
+        "QWindow", "Updates can only be scheduled from the GUI (main) thread");
+
     Q_D(QWindow);
     if (d->updateRequestPending || !d->platformWindow)
         return;