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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-gc --verify-heap
var realm = Realm.create();
var g = Realm.global(realm);
var obj = {x: 0, g: g};
// Navigation will replace JSGlobalObject behind the JSGlobalProxy g and
// therefore will change the g's map. The old map must be marked as non-stable.
Realm.navigate(realm);
gc();
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