QQmlObjectCreator: Do not delete objects not owned by engine

Fixes: QTBUG-76932
Change-Id: I05c8dba8c7339fe79c9d7de9158a0eb9e041579d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/qml/qml/qqmlobjectcreator.cpp b/src/qml/qml/qqmlobjectcreator.cpp
index be40eeb58a..59651246e4 100644
--- a/src/qml/qml/qqmlobjectcreator.cpp
+++ b/src/qml/qml/qqmlobjectcreator.cpp
@@ -1445,8 +1445,12 @@ void QQmlObjectCreator::clear()
         return;
     Q_ASSERT(phase != Startup);
 
-    while (!sharedState->allCreatedObjects.isEmpty())
-        delete sharedState->allCreatedObjects.pop();
+    while (!sharedState->allCreatedObjects.isEmpty()) {
+        auto object = sharedState->allCreatedObjects.pop();
+        if (engine->objectOwnership(object) != QQmlEngine::CppOwnership) {
+            delete object;
+        }
+    }
 
     while (sharedState->componentAttached) {
         QQmlComponentAttached *a = sharedState->componentAttached;