tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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bug1106982-2.js (329B)

      1 var x = "wrong";
      2 var t = {x: "x"};
      3 var hits = 0;
      4 var p = new Proxy(t, {
      5    has(t, id) {
      6        var found = id in t;
      7        if (++hits == 2)
      8            delete t[id];
      9        return found;
     10    },
     11    get(t, id) { return t[id]; }
     12 });
     13 evaluate(`x += " x";`, {envChainObject: p});
     14 assertEq(hits, 2);
     15 assertEq(t.x, "undefined x");