bug1106982-2.js - mozsearch

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var x = "wrong";

var t = {x: "x"};

var hits = 0;

var p = new Proxy(t, {

    has(t, id) {

        var found = id in t;

        if (++hits == 2)

            delete t[id];

        return found;

},

    get(t, id) { return t[id]; }

});

evaluate(`x += " x";`, {envChainObject: p});

assertEq(hits, 2);

assertEq(t.x, "undefined x");