bug-2068369.js - mozsearch

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gczeal(0);

var A = newGlobal({newCompartment: true});

var Z = newGlobal({newCompartment: true});

A.eval(`

  var o = {};

  for (var i = 0; i < 400; i++) o["pad" + i + "Y".repeat(40)] = 1;

  o["de" + "sc" + "X".repeat(2000)] = 1;

  var keys = Object.keys(o);

  var X = keys[keys.length - 1];

  o = null; keys = null;

  var S = null;

  function mk() { S = Symbol(X); }

  function drop() { X = null; S = null; }

`);

Z.A = A;

Z.eval('var s; function grab() { s = A.S; A = null; } function f() { return s.description; }');

schedulezone(Z); schedulezone("atomsx"); startgc(1, "zone");

while (gcstate() == "Prepare") gcslice(1);

A.mk();

Z.grab();

while (gcstate() != "NotActive") gcslice(100);

A.drop();

schedulezone(A); schedulezone("atomsx"); gc("zone");

schedulezone(A); schedulezone("atomsx"); gc("zone");

var junk = [];

for (var i = 0; i < 200000; i++) junk.push(Symbol());

var d = Z.f();

print(typeof d, d.length);

print(String(d).slice(0, 50));