Please forgive me if this appears more like a rant than a feature request, but I have searched and can't find any explanation for why some error messages are displayed without any `displayName` from the component responsible - and this is driving me insane.

_Every_ component in my project has an explicit `displayName` specified.  I do this for debugging.

I am rendering a bunch of immutable props.  I changed one of the prop types from a `List` to a `Map` and I see:

> Warning: Using Maps as children is not yet fully supported. It is an experimental feature that might be removed. Convert it to a sequence / iterable of keyed ReactElements instead.

Obviously I missed something, which could be easily fixed if I knew _where_ it was - even just the component's name.

This message is not only frustrating, but it's taunting "I know where the problem is but I won't tell you!"-feel makes it infuriating.  Looking at the stacktrace behind it is useless as well because it's, as usual, a never-ending list of React function calls with no mention of any of my source files.

I have spent countless time hunting down errors like this that would have taken only moments if I knew the name of the component responsible.  It would be _infinitely more helpful_ if the `displayName` field appeared in more debug output.

null,
      13,
      '.1'
    );
    delete String.prototype.key;
    delete Number.prototype.key;
  });
  it('should throw on object', function() {
    expect(function() {
      traverseAllChildren({a: 1, b: 2}, function() {}, null);
    }).toThrowError(
      'Objects are not valid as a React child (found: object with keys ' +
      '{a, b}). If you meant to render a collection of children, use an ' +
      'array instead or wrap the object using createFragment(object) from ' +
      'the React add-ons.'
    );
  });
  it('should throw on regex', function() {
    
    
    expect(function() {
      traverseAllChildren(/abc/, function() {}, null);
    }).toThrowError(
      'Objects are not valid as a React child (found: /abc/). If you meant ' +
      'to render a collection of children, use an array instead or wrap the ' +
      'object using createFragment(object) from the React add-ons.'
    );
  });
});