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.
if (interactions.size > 0) {
        const subscriber = __subscriberRef.current;
        if (subscriber !== null) {
          const threadID = computeThreadID(
            expirationTime,
            root.interactionThreadID,
          );
          try {
            subscriber.onWorkStarted(interactions, threadID);
          } catch (error) {
            
            
            
            if (!hasUnhandledError) {
              hasUnhandledError = true;
              unhandledError = error;
            }
          }
        }
      }
    }
  }
  let didFatal = false;
  startWorkLoopTimer(nextUnitOfWork);
  do {
    try {
      workLoop(isYieldy);
    } catch (thrownValue) {
      if (nextUnitOfWork === null) {