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diff --git a/js/xpconnect/tests/chrome/test_bug866823.xhtml b/js/xpconnect/tests/chrome/test_bug866823.xhtml
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+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=866823
+-->
+<window title="Mozilla Bug 866823"
+ xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+ <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+ <!-- test results are displayed in the html:body -->
+ <body xmlns="http://www.w3.org/1999/xhtml">
+ <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=866823"
+ target="_blank">Mozilla Bug 866823</a>
+ </body>
+
+ <!-- test code goes here -->
+ <script type="application/javascript">
+ <![CDATA[
+ /** Test for Bug 866823 **/
+ SimpleTest.waitForExplicitFinish();
+
+ function go() {
+ var iwin = $('ifr').contentWindow;
+
+ // Make sure that Xray waivers can't be transitively extended onto objects
+ // for whom the extender may not waive.
+ var sb = new Cu.Sandbox(iwin, { wantXrays: true });
+ sb.iwin = iwin;
+ ok(Cu.evalInSandbox('iwin.wrappedJSObject.top == iwin.top', sb), "Waiver does not propagate");
+ Cu.evalInSandbox('iwin.wrappedJSObject.waiver = iwin.wrappedJSObject', sb);
+ ok(iwin.wrappedJSObject.eval('waiver == window'), "Waivers disappear same-compartment");
+
+ // Make sure that standard prototypes don't get COWs.
+ sb.objProto = Object.prototype;
+ try {
+ sb.eval('objProto.toString;', sb);
+ ok(false, "Should have thrown");
+ } catch (e) {
+ ok(/denied|insecure/, "No silent failure when accessing properties on forbidden prototype");
+ }
+
+ SimpleTest.finish();
+ }
+
+ ]]>
+ </script>
+ <iframe id="ifr" onload="go();" type="content" src="http://example.org/tests/js/xpconnect/tests/mochitest/file_empty.html" />
+</window>