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.
}
    node = node.return;
  }
  return null;
}
function storeInteractionsForExpirationTime(
  root: FiberRoot,
  expirationTime: ExpirationTime,
  updateInteractionCounts: boolean,
): void {
  if (!enableSchedulerTracking) {
    return;
  }
  const interactions = __interactionsRef.current;
  if (interactions.size > 0) {
    const pendingInteractions = root.pendingInteractionMap.get(expirationTime);
    if (pendingInteractions != null) {
      interactions.forEach(interaction => {
        if (updateInteractionCounts && !pendingInteractions.has(interaction)) {
          
          interaction.__count++;
        }
        pendingInteractions.add(interaction);
      });
    } else {
      root.pendingInteractionMap.set(expirationTime, new Set(interactions));
      
      if (updateInteractionCounts) {
        interactions.forEach(interaction => {
          interaction.__count++;