1 files changed, 8 insertions, 1 deletions
diff --git a/WebCore/bindings/js/JSDesktopNotificationsCustom.cpp b/WebCore/bindings/js/JSDesktopNotificationsCustom.cpp
index 6c4dfb4..38334b9 100644
--- a/WebCore/bindings/js/JSDesktopNotificationsCustom.cpp
+++ b/WebCore/bindings/js/JSDesktopNotificationsCustom.cpp
@@ -47,8 +47,15 @@ namespace WebCore {
 
 JSValue JSNotificationCenter::requestPermission(ExecState* exec)
 {
-    // Permission request is only valid from page context.
     ScriptExecutionContext* context = impl()->context();
+
+    // Make sure that script execution context is valid.
+    if (!context) {
+        setDOMException(exec, INVALID_STATE_ERR);
+        return jsUndefined();
+    }
+
+    // Permission request is only valid from page context.
     if (context->isWorkerContext())
         return throwSyntaxError(exec);