Fix null-pointer access in QQuickVisualDataModelPrivate

I observed null cachItem->contextData which lead to null-pointer access
on cacheItem->contextData->destroy().

Task-number: QTBUG-31439

Change-Id: I91f28a3ee1ac83446ecde1801a1cb7962fb883f3
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

diff --git a/src/qml/types/qqmldelegatemodel.cpp b/src/qml/types/qqmldelegatemodel.cpp
index 279e2ea..747c939 100644 (file)
--- a/src/qml/types/qqmldelegatemodel.cpp
+++ b/src/qml/types/qqmldelegatemodel.cpp
@@ -854,7 +854,8 @@ void QQmlDelegateModelPrivate::incubatorStatusChanged(QQDMIncubationTask *incuba
         delete cacheItem->object;
         cacheItem->object = 0;
         cacheItem->scriptRef -= 1;
-        cacheItem->contextData->destroy();
+        if (cacheItem->contextData)
+            cacheItem->contextData->destroy();
         cacheItem->contextData = 0;
 
         if (!cacheItem->isReferenced()) {