**Do you want to request a *feature* or report a *bug*?**
Bug

**What is the current behavior?**
Page load throws console error: `Warning: Stateless function components cannot be given refs. Attempts to access this ref will fail.null`

```
// Chrome console
6VM598:27 Warning: Stateless function components cannot be given refs. Attempts to access this ref will fail.null
window.console.error @ VM598:27
printWarning @ warning.js:36
warning @ warning.js:60
mountIndeterminateComponent @ react-dom.development.js:10488
beginWork @ react-dom.development.js:10647
performUnitOfWork @ react-dom.development.js:12621
workLoop @ react-dom.development.js:12730
callCallback @ react-dom.development.js:1319
invokeGuardedCallbackDev @ react-dom.development.js:1358
invokeGuardedCallback @ react-dom.development.js:1215
performWork @ react-dom.development.js:12848
batchedUpdates @ react-dom.development.js:13292
performFiberBatchedUpdates @ react-dom.development.js:1666
stackBatchedUpdates @ react-dom.development.js:1657
batchedUpdates @ react-dom.development.js:1671
batchedUpdatesWithControlledComponents @ react-dom.development.js:1684
dispatchEvent @ react-dom.development.js:1894
```

**What is the expected behavior?**
No console error. Or at least some way to trace which is the stateless component that is causing the issue.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
`"react": "^16.0.0-rc.3",`
`Chrome Version 60.0.3112.113 (Official Build) (64-bit)`
`macOS Sierra 10.12.6`


- This error only started to appear after upgrading from React 15 -> 16.
flushSync,
    deferredUpdates,
  } = ReactFiberScheduler(config);
  function scheduleTopLevelUpdate(
    current: Fiber,
    element: ReactNodeList,
    callback: ?Function,
  ) {
    if (__DEV__) {
      if (
        ReactDebugCurrentFiber.phase === 'render' &&
        ReactDebugCurrentFiber.current !== null
      ) {
        warning(
          false,
          'Render methods should be a pure function of props and state; ' +
            'triggering nested component updates from render is not allowed. ' +
            'If necessary, trigger nested updates in componentDidUpdate.\n\n' +
            'Check the render method of %s.',
          getComponentName(ReactDebugCurrentFiber.current) || 'Unknown',
        );
      }
    }
    
    
    
    const forceAsync =
      ReactFeatureFlags.enableAsyncSubtreeAPI &&
      element != null &&
      element.type != null &&