From d54af5d3f61b832a606856d1f1ebad89ccb07f5f Mon Sep 17 00:00:00 2001
From: Andy Shaw <andy.shaw@digia.com>
Date: Fri, 20 Dec 2013 09:56:01 +0100
Subject: [PATCH] Prevent a crash when there is no accessible interface

Change-Id: I058b76ff9d40b75eb51f9a6b1b89032ead629aed
Reviewed-by: Liang Qi <liang.qi@digia.com>
---
 src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm b/src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm
index 8e20a96a48..66c7727f15 100644
--- a/src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm
+++ b/src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm
@@ -240,7 +240,10 @@
 // misc
 
 - (BOOL)accessibilityIsIgnored {
-    return QCocoaAccessible::shouldBeIgnored(QAccessible::accessibleInterface(axid));
+    QAccessibleInterface *iface = QAccessible::accessibleInterface(axid);
+    if (!iface || !iface->isValid())
+        return true;
+    return QCocoaAccessible::shouldBeIgnored(iface);
 }
 
 - (id)accessibilityHitTest:(NSPoint)point {