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.
);
  let fiber = sourceFiber.return;
  while (fiber !== null) {
    switch (fiber.tag) {
      case ClassComponent:
      case ClassComponentLazy:
        const ctor = fiber.type;
        const instance = fiber.stateNode;
        if (
          typeof ctor.getDerivedStateFromCatch === 'function' ||
          (typeof instance.componentDidCatch === 'function' &&
            !isAlreadyFailedLegacyErrorBoundary(instance))
        ) {
          const errorInfo = createCapturedValue(value, sourceFiber);
          const update = createClassErrorUpdate(
            fiber,
            errorInfo,
            expirationTime,
          );
          enqueueUpdate(fiber, update);
          scheduleWork(fiber, expirationTime);
          return;
        }
        break;
      case HostRoot: {
        const errorInfo = createCapturedValue(value, sourceFiber);
        const update = createRootErrorUpdate(fiber, errorInfo, expirationTime);
        enqueueUpdate(fiber, update);
        scheduleWork(fiber, expirationTime);
        return;