**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.
startWorkTimer,
    stopWorkTimer,
    stopFailedWorkTimer,
    startWorkLoopTimer,
    stopWorkLoopTimer,
    startCommitTimer,
    stopCommitTimer,
    startCommitHostEffectsTimer,
    stopCommitHostEffectsTimer,
    startCommitLifeCyclesTimer,
    stopCommitLifeCyclesTimer,
  } = require('ReactDebugFiberPerf');
  var warnAboutUpdateOnUnmounted = function(
    instance: React$ComponentType<any>,
  ) {
    const ctor = instance.constructor;
    warning(
      false,
      'Can only update a mounted or mounting component. This usually means ' +
        'you called setState, replaceState, or forceUpdate on an unmounted ' +
        'component. This is a no-op.\n\nPlease check the code for the ' +
        '%s component.',
      (ctor && (ctor.displayName || ctor.name)) || 'ReactClass',
    );
  };
  var warnAboutInvalidUpdates = function(instance: React$ComponentType<any>) {
    switch (ReactDebugCurrentFiber.phase) {
      case 'getChildContext':
        warning(
          false,