src/third_party/v8/test/mjsunit/es6/array-concat-arraylike-length-tostring-throws.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.

"use strict";
function MyError() {}
var obj = {
  "length": { toString: function() {
      throw new MyError();
    }, valueOf: null
  },
  "1": "A",
  "3": "B",
  "5": "C"
};
obj[Symbol.isConcatSpreadable] = true;
assertThrows(function() {
  [].concat(obj);
}, MyError);