Accessibility: Fix crash when updating in dtor

This happens for example when running several tests.
Widgets in destructor should be treated as invalid
since their window pointer and other properties are
no longer valid.

When deleting a window containing only a table view
there would be a table model reset update comming from
the window being destroyed.

Change-Id: Ia387c814333ce373fe132b189fc180787e36cdd5
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/platformsupport/linuxaccessibility/atspiadaptor.cpp b/src/platformsupport/linuxaccessibility/atspiadaptor.cpp
index 001976e9fe..050cb6a0bc 100644
--- a/src/platformsupport/linuxaccessibility/atspiadaptor.cpp
+++ b/src/platformsupport/linuxaccessibility/atspiadaptor.cpp
@@ -809,9 +809,13 @@ void AtSpiAdaptor::windowActivated(QObject* window, bool active)
         return;
 
     QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(window);
-    Q_ASSERT(iface && iface->isValid());
+    Q_ASSERT(iface);
+    Q_ASSERT(!active || iface->isValid());
 
-    QString windowTitle = iface->text(QAccessible::Name);
+    QString windowTitle;
+    // in dtor it may be invalid
+    if (iface->isValid())
+        windowTitle = iface->text(QAccessible::Name);
     delete iface;
 
     QDBusVariant data;