bug-2081988.js - mozsearch

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// SpiderMonkey shell: queued cleanup must blacken its held value before GC ends.

gczeal(0);

let target = {};

let called = false;

(function () {

  const held = Object.create(null);

  const registry = new FinalizationRegistry(() => { called = true; });

  registry.register(target, held);

  addMarkObservers([registry, held]);

  grayRoot()[0] = registry;

})();

gc();

assertEq(getMarks().join('/'), 'gray/gray');

target = null;

gc();

assertEq(called, false);

assertEq(getMarks().join('/'), 'gray/black');

drainJobQueue();

assertEq(called, true);