Fix memory leak in QQmlComponent::createObject

Regression introduced with 5.3.0. Prevent the leak of the object creator
on repeated createObject calls by using a scoped pointer.

Change-Id: Ib4fe7c9c6926c2390f7ae78f3287bb7da5f60527
Task-number: QTBUG-39742
Reviewed-by: Lars Knoll <[email protected]>

2 files changed, 4 insertions, 6 deletions

diff --git a/src/qml/qml/qqmlcomponent.cpp b/src/qml/qml/qqmlcomponent.cpp
index e9a3449a22..1da2f1c109 100644
--- a/src/qml/qml/qqmlcomponent.cpp
+++ b/src/qml/qml/qqmlcomponent.cpp
@@ -880,7 +880,7 @@ QQmlComponentPrivate::beginCreate(QQmlContextData *context)
 
     enginePriv->referenceScarceResources();
     QObject *rv = 0;
-    state.creator = new QQmlObjectCreator(context, cc, creationContext);
+    state.creator.reset(new QQmlObjectCreator(context, cc, creationContext));
     rv = state.creator->create(start);
     if (!rv)
         state.errors = state.creator->errors;
@@ -920,7 +920,7 @@ void QQmlComponentPrivate::beginDeferred(QQmlEnginePrivate *enginePriv,
     Q_ASSERT(ddata->deferredData);
     QQmlData::DeferredData *deferredData = ddata->deferredData;
     QQmlContextData *creationContext = 0;
-    state->creator = new QQmlObjectCreator(deferredData->context->parent, deferredData->compiledData, creationContext);
+    state->creator.reset(new QQmlObjectCreator(deferredData->context->parent, deferredData->compiledData, creationContext));
     if (!state->creator->populateDeferredProperties(object))
         state->errors << state->creator->errors;
 }
diff --git a/src/qml/qml/qqmlcomponent_p.h b/src/qml/qml/qqmlcomponent_p.h
index e8ae540148..2c70d7b100 100644
--- a/src/qml/qml/qqmlcomponent_p.h
+++ b/src/qml/qml/qqmlcomponent_p.h
@@ -106,15 +106,13 @@ public:
 
     struct ConstructionState {
         ConstructionState()
-            : creator(0)
-            , completePending(false)
+            : completePending(false)
         {}
         ~ConstructionState()
         {
-            delete creator;
         }
 
-        QQmlObjectCreator *creator;
+        QScopedPointer<QQmlObjectCreator> creator;
         QList<QQmlError> errors;
         bool completePending;
     };