// 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: --harmony-object-observe --stack-size=100

var a = [];

Array.observe(a, function() {});

function f(a, x) {
  a.length = x;
  f(a, x + 1);
}

assertThrows(function() { f(a, 1); }, RangeError);
