function shouldBe(actual, expected) { if (actual !== expected) throw new Error('bad value: ' + actual); } function test(target) { return Object(target); } noInline(test); (function () { for (var i = 0; i < 1e4; ++i) { var object = test(true); shouldBe(object instanceof Boolean, true); shouldBe(object.valueOf(), true); } }());