Avoid warnings as delegates with bindings to parent are created and destroyed.

Task-number: QTBUG-10359

3 files changed, 15 insertions, 7 deletions

diff --git a/src/declarative/qml/qdeclarativecontext.cpp b/src/declarative/qml/qdeclarativecontext.cpp
index ae4223e..b61b8cb 100644
--- a/src/declarative/qml/qdeclarativecontext.cpp
+++ b/src/declarative/qml/qdeclarativecontext.cpp
@@ -528,13 +528,8 @@ void QDeclarativeContextData::invalidate()
     parent = 0;
 }
 
-void QDeclarativeContextData::destroy()
+void QDeclarativeContextData::clearExpressions()
 {
-    if (linkedContext) 
-        linkedContext->destroy();
-
-    if (engine) invalidate();
-
     QDeclarativeAbstractExpression *expression = expressions;
     while (expression) {
         QDeclarativeAbstractExpression *nextExpression = expression->m_nextExpression;
@@ -546,6 +541,16 @@ void QDeclarativeContextData::destroy()
         expression = nextExpression;
     }
     expressions = 0;
+}
+
+void QDeclarativeContextData::destroy()
+{
+    if (linkedContext) 
+        linkedContext->destroy();
+
+    if (engine) invalidate();
+
+    clearExpressions();
 
     while (contextObjects) {
         QDeclarativeData *co = contextObjects;
diff --git a/src/declarative/qml/qdeclarativecontext_p.h b/src/declarative/qml/qdeclarativecontext_p.h
index c7fb099..6b6cd0a 100644
--- a/src/declarative/qml/qdeclarativecontext_p.h
+++ b/src/declarative/qml/qdeclarativecontext_p.h
@@ -113,6 +113,7 @@ class QDeclarativeContextData
 public:
     QDeclarativeContextData();
     QDeclarativeContextData(QDeclarativeContext *);
+    void clearExpressions();
     void destroy();
     void invalidate();
 
diff --git a/src/declarative/qml/qdeclarativeengine.cpp b/src/declarative/qml/qdeclarativeengine.cpp
index cc6c5fe..9f5cafe 100644
--- a/src/declarative/qml/qdeclarativeengine.cpp
+++ b/src/declarative/qml/qdeclarativeengine.cpp
@@ -329,8 +329,10 @@ void QDeclarativePrivate::qdeclarativeelement_destructor(QObject *o)
     QObjectPrivate *p = QObjectPrivate::get(o);
     Q_ASSERT(p->declarativeData);
     QDeclarativeData *d = static_cast<QDeclarativeData*>(p->declarativeData);
-    if (d->ownContext)
+    if (d->ownContext && d->context) {
         d->context->destroy();
+        d->context = 0;
+    }
 }
 
 void QDeclarativeData::destroyed(QAbstractDeclarativeData *d, QObject *o)