Do not look up objects in deferred properties

If a property is a deferred property then skip it if
searching for qobjects.
This is not enough to avoid all asserts, but not reading
deferred properties does make sense in any case.

Task-number: QTBUG-67152
Change-Id: I495051745a5daf458909ff6c4cb5210597774ded
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/quick/designer/qquickdesignersupportitems.cpp b/src/quick/designer/qquickdesignersupportitems.cpp
index 9fadbb2122..82474827aa 100644
--- a/src/quick/designer/qquickdesignersupportitems.cpp
+++ b/src/quick/designer/qquickdesignersupportitems.cpp
@@ -94,11 +94,24 @@ static void allSubObjects(QObject *object, QObjectList &objectList)
 
     objectList.append(object);
 
+    const QMetaObject *mo = object->metaObject();
+
+    QStringList deferredPropertyNames;
+    const int namesIndex = mo->indexOfClassInfo("DeferredPropertyNames");
+    if (namesIndex != -1) {
+        QMetaClassInfo classInfo = mo->classInfo(namesIndex);
+        deferredPropertyNames = QString::fromUtf8(classInfo.value()).split(QLatin1Char(','));
+    }
+
     for (int index = QObject::staticMetaObject.propertyOffset();
          index < object->metaObject()->propertyCount();
          index++) {
+
         QMetaProperty metaProperty = object->metaObject()->property(index);
 
+        if (deferredPropertyNames.contains(metaProperty.name()))
+            continue;
+
         // search recursive in property objects
         if (metaProperty.isReadable()
                 && metaProperty.isWritable()