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actual = ''; expected = '900,'; function k(f_arg) { for (var i = 0; i < 10; ++i) { f_arg(i); } } function t() { var x = 1; k(function (i) { x = i; }); return x; } var ans = 0; for (var j = 0; j < 10; ++j) { for (var i = 0; i < 10; ++i) { ans += t(); } } appendToActual(ans); assertEq(actual, expected)