From f7ebb8d4c64030a0569f8f2af98dad665a6866a7 Mon Sep 17 00:00:00 2001
From: Shawn Rutledge <shawn.rutledge@digia.com>
Date: Tue, 20 Aug 2013 11:41:15 +0200
Subject: QXcbBackingStore: don't crash in flush() if no platformWindow

Task-number: QTBUG-32681
Change-Id: Iec7204985867a8d65cea393ba6ab66d328a5e7b2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
---
 src/plugins/platforms/xcb/qxcbbackingstore.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.cpp b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
index 1f2485db0d..dc677cd3be 100644
--- a/src/plugins/platforms/xcb/qxcbbackingstore.cpp
+++ b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
@@ -306,6 +306,10 @@ void QXcbBackingStore::flush(QWindow *window, const QRegion &region, const QPoin
     Q_XCB_NOOP(connection());
 
     QXcbWindow *platformWindow = static_cast<QXcbWindow *>(window->handle());
+    if (!platformWindow) {
+        qWarning("QXcbBackingStore::flush: QWindow has no platform window (QTBUG-32681)");
+        return;
+    }
 
     QVector<QRect> rects = clipped.rects();
     for (int i = 0; i < rects.size(); ++i)
-- 
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