Version 3.26.31.8 (merged r21903)

test/mjsunit/regress/regress-crbug-387031.js

 // Copyright 2014 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: --allow-natives-syntax
 
-var a = {y:1.5};
-a.y = 0;
-var b = a.y;
-a.y = {};
-var d = 1;
-function f() {
-  d = 0;
-  return {y: b};
+a = [1];
+b = [];
+a.__defineGetter__(0, function () {
+  b.length = 0xffffffff;
+});
+c = a.concat(b);
+for (var i = 0; i < 20; i++) {
+  assertEquals(undefined, (c[i]));
 }
-f();
-f();
-%OptimizeFunctionOnNextCall(f);
-f();