v8/test/mjsunit/regress/regress-json-stringify-gc.js

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var a = [];
var new_space_string = "";
for (var i = 0; i < 128; i++) {
  new_space_string += String.fromCharCode((Math.random() * 26 + 65) | 0);
}
for (var i = 0; i < 10000; i++) a.push(new_space_string);

// At some point during the first stringify, allocation causes a GC and
// new_space_string is moved to old space. Make sure that this does not
// screw up reading from the correct location.
json1 = JSON.stringify(a);
json2 = JSON.stringify(a);
assertTrue(json1 == json2, "GC caused JSON.stringify to fail.");