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diff --git a/js/src/tests/test262/built-ins/Proxy/isExtensible/trap-is-not-callable-realm.js b/js/src/tests/test262/built-ins/Proxy/isExtensible/trap-is-not-callable-realm.js
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+++ b/js/src/tests/test262/built-ins/Proxy/isExtensible/trap-is-not-callable-realm.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-proxy-object-internal-methods-and-internal-slots-isextensible
+description: >
+ Throws if trap is not callable (honoring the Realm of the current execution
+ context)
+info: |
+ [[IsExtensible]] ( )
+
+ ...
+ 1. Let handler be the value of the [[ProxyHandler]] internal slot of O.
+ ...
+ 5. Let trap be GetMethod(handler, "isExtensible").
+ ...
+ 7.3.9 GetMethod (O, P)
+ ...
+ 2. Let func be GetV(O, P).
+ 5. If IsCallable(func) is false, throw a TypeError exception.
+ ...
+features: [cross-realm, Proxy]
+---*/
+
+var OProxy = $262.createRealm().global.Proxy;
+var p = new OProxy({}, {
+ isExtensible: {}
+});
+
+assert.throws(TypeError, function() {
+ Object.isExtensible(p);
+});
+
+reportCompare(0, 0);