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// |reftest| skip-if(!this.hasOwnProperty('Iterator')) -- Iterator is not enabled unconditionally
const sum = (x, y) => x + y;
assertThrowsInstanceOf(Iterator.prototype.reduce.bind(undefined, sum), TypeError);
assertThrowsInstanceOf(Iterator.prototype.reduce.bind({}, sum), TypeError);
assertThrowsInstanceOf(Iterator.prototype.reduce.bind({next: 0}, sum), TypeError);
if (typeof reportCompare === 'function')
reportCompare(0, 0);