"use strict"; // https://code.google.com/p/v8/issues/detail?id=2560 // v8 --harmony should print 0 1 2 (not 3 3 3) when executing: var arr = []; for (let x = 0; x < 3; x++) { arr.push(function() { console.log(x); }); } arr.forEach(function(f) { f(); });