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function test() {
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// Array.prototype.push -> Set -> [[Set]]
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var set = [];
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var p = new Proxy([], { set: function(o, k, v) { set.push(k); o[k] = v; return true; }});
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p.push(0,0,0);
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return set + '' === "0,1,2,length";
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}
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if (!test())
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throw new Error("Test failed");
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