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+// Copyright 2018 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.
+
+// Create BigInt in large object space for which MakeImmutable reduces the
+// length.
+const x = 2n ** (2n ** 22n);
+assertEquals(1n, x - (x - 1n));