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.
result = lastUniqueAsyncExpiration + 1;
  }
  lastUniqueAsyncExpiration = result;
  return lastUniqueAsyncExpiration;
}
function computeExpirationForFiber(currentTime: ExpirationTime, fiber: Fiber) {
  let expirationTime;
  if (expirationContext !== NoWork) {
    
    expirationTime = expirationContext;
  } else if (isWorking) {
    if (isCommitting) {
      
      
      expirationTime = Sync;
    } else {
      
      
      expirationTime = nextRenderExpirationTime;
    }
  } else {
    
    
    if (fiber.mode & AsyncMode) {
      if (isBatchingInteractiveUpdates) {
        
        expirationTime = computeInteractiveExpiration(currentTime);
      } else {