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.
alternate.expirationTime = expirationTime;
  }
   Walk the parent path to the root and update the child expiration time.
  let node = fiber.return;
  if (node === null && fiber.tag === HostRoot) {
    return fiber.stateNode;
  }
  while (node !== null) {
    alternate = node.alternate;
    if (
      node.childExpirationTime === NoWork ||
      node.childExpirationTime > expirationTime
    ) {
      node.childExpirationTime = expirationTime;
      if (
        alternate !== null &&
        (alternate.childExpirationTime === NoWork ||
          alternate.childExpirationTime > expirationTime)
      ) {
        alternate.childExpirationTime = expirationTime;
      }
    } else if (
      alternate !== null &&
      (alternate.childExpirationTime === NoWork ||
        alternate.childExpirationTime > expirationTime)
    ) {
      alternate.childExpirationTime = expirationTime;
    }
    if (node.return === null && node.tag === HostRoot) {
      return node.stateNode;