Don't crash when an animation update causes it to delete itself.

Change-Id: Ic108adfb99a09e6ede71d474240fb0917cee6961
Reviewed-by: Bea Lam <bea.lam@nokia.com>

2 files changed, 46 insertions, 0 deletions

diff --git a/tests/auto/qtquick2/qdeclarativesmoothedanimation/data/deleteOnUpdate.qml b/tests/auto/qtquick2/qdeclarativesmoothedanimation/data/deleteOnUpdate.qml
new file mode 100644
index 0000000000..ff8dfaa846
--- /dev/null
+++ b/tests/auto/qtquick2/qdeclarativesmoothedanimation/data/deleteOnUpdate.qml
@@ -0,0 +1,27 @@
+import QtQuick 2.0
+
+Rectangle {
+    width: 300; height: 300;
+
+    Rectangle {
+        color: "red"
+        width: 60; height: 60;
+        x: 100; y: 100;
+
+        property real prevX: 100
+        onXChanged: {
+            if (x - prevX > 10) {
+                anim.to += 5
+                anim.restart(); //this can cause deletion of backend animation classes
+                prevX = x;
+            }
+        }
+
+        SmoothedAnimation on x {
+            id: anim
+            objectName: "anim"
+            velocity: 100
+            to: 150
+        }
+    }
+}
diff --git a/tests/auto/qtquick2/qdeclarativesmoothedanimation/tst_qdeclarativesmoothedanimation.cpp b/tests/auto/qtquick2/qdeclarativesmoothedanimation/tst_qdeclarativesmoothedanimation.cpp
index 3d37517d10..09bde4ad76 100644
--- a/tests/auto/qtquick2/qdeclarativesmoothedanimation/tst_qdeclarativesmoothedanimation.cpp
+++ b/tests/auto/qtquick2/qdeclarativesmoothedanimation/tst_qdeclarativesmoothedanimation.cpp
@@ -59,6 +59,7 @@ private slots:
     void simpleAnimation();
     void valueSource();
     void behavior();
+    void deleteOnUpdate();
 
 private:
     QDeclarativeEngine engine;
@@ -218,6 +219,24 @@ void tst_qdeclarativesmoothedanimation::behavior()
     delete rect;
 }
 
+void tst_qdeclarativesmoothedanimation::deleteOnUpdate()
+{
+    QDeclarativeEngine engine;
+
+    QDeclarativeComponent c(&engine, testFileUrl("deleteOnUpdate.qml"));
+
+    QQuickRectangle *rect = qobject_cast<QQuickRectangle*>(c.create());
+    QVERIFY(rect);
+
+    QDeclarativeSmoothedAnimation *anim = rect->findChild<QDeclarativeSmoothedAnimation*>("anim");
+    QVERIFY(anim);
+
+    //don't crash
+    QTest::qWait(500);
+
+    delete rect;
+}
+
 QTEST_MAIN(tst_qdeclarativesmoothedanimation)
 
 #include "tst_qdeclarativesmoothedanimation.moc"