I can't quite figure out how to use the profiling build. I aliased `react-dom` to `react-dom/profiling` but I get this error:

<img width="448" alt="screen shot 2018-09-08 at 20 17 02" src="https://user-images.githubusercontent.com/810438/45257816-2d405780-b3a4-11e8-9615-0b27abd0442b.png">
<img width="272" alt="screen shot 2018-09-08 at 20 17 06" src="https://user-images.githubusercontent.com/810438/45257817-2d405780-b3a4-11e8-8a08-f5a0650debfe.png">

I didn't want interactions, I just want profiling. What am I doing wrong?

To repro, use CRA, then eject, then add `react-dom` -> `react-dom/profiling` to alias in webpack prod config and build.
legacyErrorBoundariesThatAlreadyFailed.add(instance);
  }
}
function commitRoot(root: FiberRoot, finishedWork: Fiber): void {
  isWorking = true;
  isCommitting = true;
  startCommitTimer();
  invariant(
    root.current !== finishedWork,
    'Cannot commit the same tree as before. This is probably a bug ' +
      'related to the return field. This error is likely caused by a bug ' +
      'in React. Please file an issue.',
  );
  const committedExpirationTime = root.pendingCommitExpirationTime;
  invariant(
    committedExpirationTime !== NoWork,
    'Cannot commit an incomplete root. This error is likely caused by a ' +
      'bug in React. Please file an issue.',
  );
  root.pendingCommitExpirationTime = NoWork;
  
  
  
  const updateExpirationTimeBeforeCommit = finishedWork.expirationTime;
  const childExpirationTimeBeforeCommit = finishedWork.childExpirationTime;
  const earliestRemainingTimeBeforeCommit =
    updateExpirationTimeBeforeCommit === NoWork ||
    (childExpirationTimeBeforeCommit !== NoWork &&
      childExpirationTimeBeforeCommit < updateExpirationTimeBeforeCommit)
      ? childExpirationTimeBeforeCommit