Construct instances of base class from TypedArray.prototype.subarray

test/mjsunit/regress/regress-4665.js

Index: test/mjsunit/regress/regress-4665.js
diff --git a/test/mjsunit/regress/regress-4665.js b/test/mjsunit/regress/regress-4665.js
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index 0000000000000000000000000000000000000000..9d7307acc7aaace6c488c6ca230bdc59cb9c384e
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+++ b/test/mjsunit/regress/regress-4665.js
@@ -0,0 +1,33 @@
+// Copyright 2015 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: --noharmony-species
+
+// First test case
+
+function FirstBuffer () {}
+FirstBuffer.prototype.__proto__ = Uint8Array.prototype
+FirstBuffer.__proto__ = Uint8Array
+
+var buf = new Uint8Array(10)
+buf.__proto__ = FirstBuffer.prototype
+
+var buf2 = buf.subarray(2)
+assertEquals(8, buf2.length);
+
+// Second test case
+
+function SecondBuffer (arg) {
+  var arr = new Uint8Array(arg)
+  arr.__proto__ = SecondBuffer.prototype
+  return arr
+}
+SecondBuffer.prototype.__proto__ = Uint8Array.prototype
+SecondBuffer.__proto__ = Uint8Array
+
+var buf3 = new SecondBuffer(10)
+
+var buf4 = buf3.subarray(2)
+
+assertEquals(8, buf4.length);