michael@0: Function.prototype.__proto__["p"] = 3
michael@0: c = [].__proto__
michael@0: c[5] = 3
michael@0: gc()
michael@0: Function("\
michael@0:     {\
michael@0:     function f(d) {}\
michael@0:     for each(let z in[0]) {\
michael@0:         f(z)\
michael@0:     }\
michael@0:     }\
michael@0: ")()