Avoid double deletion of QQuickWindow

It's uncertain why 4fc0df58b8458052a818e3e970a97457882808e6 added
the call to sendPostedEvents(0, QEvent::DeferredDelete) but now we can
see that it easily results in the destructor calling itself, and
therefore double-deleting its own d_ptr.  removePostedEvents seems
safer to ensure that the window cannot be doubly deleted, in spite
of the qdoc warning that "You should never need to call this function."

Task-number: QTBUG-33436
Change-Id: I4873ebe179dde551407eba1f6baac5f03ca7f177
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickwindow/data/unloadSubWindow.qml b/tests/auto/quick/qquickwindow/data/unloadSubWindow.qml
new file mode 100644
index 0000000000..bf9df4867d
--- /dev/null
+++ b/tests/auto/quick/qquickwindow/data/unloadSubWindow.qml
@@ -0,0 +1,22 @@
+import QtQuick 2.3
+import QtQuick.Window 2.2
+
+Window {
+    id: root
+    property var transientWindow
+    property Loader loader1: Loader {
+        sourceComponent: Item {
+            Loader {
+                id: loader2
+                sourceComponent : Window {
+                    id: inner
+                    visible: true
+                    Component.onCompleted: root.transientWindow = inner
+                }
+            }
+            Component.onDestruction: {
+                loader2.active = false;
+            }
+        }
+    }
+}