# HG changeset patch
# User Kris Maglione <maglione.k@gmail.com>
# Date 1597420945 0
#      Fri Aug 14 16:02:25 2020 +0000
# Node ID 1edd9346c110b011ed87e50eb3d417202ea445fb
# Parent  f69f80e5659f11977e7f1bd48386ea22e921dd52
Bug 1658214: Only construct JS-implemented objects if inner window is current. r=bholley

Differential Revision: https://phabricator.services.mozilla.com/D86614

diff -r f69f80e5659f -r 1edd9346c110 dom/bindings/BindingUtils.cpp
--- a/dom/bindings/BindingUtils.cpp	Fri Aug 14 15:57:45 2020 +0000
+++ b/dom/bindings/BindingUtils.cpp	Fri Aug 14 16:02:25 2020 +0000
@@ -2547,6 +2547,12 @@
   {
     AutoNoJSAPI nojsapi;
 
+    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal);
+    if (!window->IsCurrentInnerWindow()) {
+      aRv.ThrowInvalidStateError("Window no longer active");
+      return;
+    }
+
     // Get the XPCOM component containing the JS implementation.
     nsresult rv;
     nsCOMPtr<nsISupports> implISupports = do_CreateInstance(aContractId, &rv);
@@ -2561,7 +2567,6 @@
     // and our global is a window.
     nsCOMPtr<nsIDOMGlobalPropertyInitializer> gpi =
         do_QueryInterface(implISupports);
-    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal);
     if (gpi) {
       JS::Rooted<JS::Value> initReturn(RootingCx());
       rv = gpi->Init(window, &initReturn);