Fix hover event crash

It was possible for a hover event to be sent to a QQuickItem that has
already been scheduled to be deleted (through deleteLater()). This
lead to an access on an already-freed object when the leave event
is generated. This change ensures that the item is part of a scene
before generating the hover enter event.

Task-number: QTBUG-32771

Change-Id: I69adb6bbd0ae52c70a6bda4e6c918b7671549a4c
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickwindow/data/hoverCrash.qml b/tests/auto/quick/qquickwindow/data/hoverCrash.qml
new file mode 100644
index 0000000000..936d9e4f43
--- /dev/null
+++ b/tests/auto/quick/qquickwindow/data/hoverCrash.qml
@@ -0,0 +1,36 @@
+import QtQuick 2.0
+import QtQuick.Window 2.0 as Window
+
+Window.Window {
+    width: 200
+    height: 200
+    color: "#00FF00"
+    Column {
+        Rectangle {
+            objectName: 'item1'
+            color: 'red'
+            width: 100
+            height: 100
+            MouseArea {
+                id: area
+                anchors.fill: parent
+                hoverEnabled: true
+            }
+        }
+
+        Loader {
+            objectName: 'item2'
+            width: 100
+            height: 100
+            active: area.containsMouse
+            sourceComponent: Rectangle {
+                color: 'blue'
+
+                MouseArea {
+                    anchors.fill: parent
+                    hoverEnabled: true
+                }
+            }
+        }
+    }
+}