Function markLegacyErrorBoundaryAsFailed

code/styling/public/app.js:12925–12931

(instance)

  }

  function markLegacyErrorBoundaryAsFailed(instance) {
    if (legacyErrorBoundariesThatAlreadyFailed === null) {
      legacyErrorBoundariesThatAlreadyFailed = new Set([instance]);
    } else {
      legacyErrorBoundariesThatAlreadyFailed.add(instance);
    }
  }

  function commitRoot(finishedWork) {
    isWorking = true;