js/src/jit-test/tests/for-of/array-holes-2.js


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// for-of consults Object.prototype when it encounters a hole.

Object.prototype[1] = 'peek';
var log = [];
for (var x of [0, , 2, 3])
    log.push(x);
assertEq(log[1], 'peek');
assertEq(log.join(), "0,peek,2,3");