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

Feature

**What is the current behavior?**

While server rendering React DOM and then hydrating with a different structure, React rightly warns that there are inconsistencies. But when I first saw these warnings I was not sure exactly what was going wrong.

Here are a few of the warnings I have been receiving:

```
Warning: Did not find a matching <button> in <div>.

Warning: Did not find a matching <img> in <div>.

Warning: Did not expect server HTML to contain a <div> in <div>.
```

Only on that last error did I catch on that this was a problem with server-rendering and the inconsistencies between that and my client render (intentional at the moment while testing some things in unpure render functions).

**What is the expected behavior?**

Being more explicit that this was a rendering inconsistency between server and client.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

React v16-beta.1
continue;
      }
      var nextProp = rawProps[propKey];
      if (propKey === CHILDREN) {
        
        
        
        
        
        
        
        
        
        if (typeof nextProp === 'string') {
          if (domElement.textContent !== nextProp) {
            if (__DEV__) {
              warnForTextDifference(domElement.textContent, nextProp);
            }
            updatePayload = [CHILDREN, nextProp];
          }
        } else if (typeof nextProp === 'number') {
          if (domElement.textContent !== '' + nextProp) {