Merge remote-tracking branch 'origin/5.6' into 5.7

Conflicts:
	src/widgets/dialogs/qcolordialog.cpp
	src/widgets/dialogs/qfiledialog.cpp
	tests/auto/network/ssl/qsslsocket/tst_qsslsocket.cpp

Change-Id: I34bc8a990f8f526889a95a5c7099ef557b9681ad

1 files changed, 5 insertions, 4 deletions

diff --git a/src/widgets/graphicsview/qgraphicsscene.cpp b/src/widgets/graphicsview/qgraphicsscene.cpp
index 6a4f740b84..15edb15619 100644
--- a/src/widgets/graphicsview/qgraphicsscene.cpp
+++ b/src/widgets/graphicsview/qgraphicsscene.cpp
@@ -717,10 +717,11 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item)
             ++it;
     }
 
-    QGraphicsObject *dummy = item->toGraphicsObject();
-    cachedTargetItems.removeOne(dummy);
-    cachedItemGestures.remove(dummy);
-    cachedAlreadyDeliveredGestures.remove(dummy);
+    if (QGraphicsObject *dummy = item->toGraphicsObject()) {
+        cachedTargetItems.removeOne(dummy);
+        cachedItemGestures.remove(dummy);
+        cachedAlreadyDeliveredGestures.remove(dummy);
+    }
 
     foreach (Qt::GestureType gesture, item->d_ptr->gestureContext.keys())
         ungrabGesture(item, gesture);