Merge remote-tracking branch 'origin/5.8' into dev

Conflicts:
	src/qml/jsruntime/qv4object_p.h

Change-Id: Iff4d3aba7710a999b8befdc493cbe959e1ce02f9

1 files changed, 4 insertions, 2 deletions

diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index dec5b44e2a..722e634fc0 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -3125,10 +3125,12 @@ void QQuickWindowPrivate::updateDirtyNode(QQuickItem *item)
 
             if (itemPriv->paintNode && itemPriv->paintNode->parent() == 0) {
                 QSGNode *before = qquickitem_before_paintNode(itemPriv);
-                if (before)
+                if (before && before->parent()) {
+                    Q_ASSERT(before->parent() == itemPriv->childContainerNode());
                     itemPriv->childContainerNode()->insertChildNodeAfter(itemPriv->paintNode, before);
-                else
+                } else {
                     itemPriv->childContainerNode()->prependChildNode(itemPriv->paintNode);
+                }
             }
         } else if (itemPriv->paintNode) {
             delete itemPriv->paintNode;