JSTests/test262/test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-7.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-array.prototype.reduce
description: >
    Array.prototype.reduce - unhandled exceptions happened in
    callbackfn terminate iteration
---*/

var accessed = false;

function callbackfn(prevVal, curVal, idx, obj) {
  if (idx > 0) {
    accessed = true;
  }
  if (idx === 0) {
    throw new Error("Exception occurred in callbackfn");
  }
}

var obj = {
  0: 11,
  4: 10,
  10: 8,
  length: 20
};
assert.throws(Error, function() {
  Array.prototype.reduce.call(obj, callbackfn, 1);
});
assert.sameValue(accessed, false, 'accessed');