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// don't assert↩
var f = function(){};↩
for (var p in f);↩
Object.defineProperty(f, "j", ({configurable: true, value: "a"}));↩
Object.defineProperty(f, "k", ({configurable: true, value: "b"}));↩
Object.defineProperty(f, "j", ({configurable: true, get: function() {}}));↩
delete f.k;↩
Object.defineProperty(f, "j", ({configurable: false}));↩