src/third_party/mozjs-45/js/src/tests/js1_8_5/extensions/regress-650753.js

// Any copyright is dedicated to the Public Domain.
// http://creativecommons.org/licenses/publicdomain/

var x = {}, h = new WeakMap;
h.set(x, null);
gc();

reportCompare(0, 0, 'ok');