We purge it [here](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L88-L89) but this code doesn’t run because of the [early exit](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L53-L57).

Need to fix this and add a test case to make sure we don’t regress on it.

return <div><p>Hi.</p></div>;
      }
      var node = document.createElement('div');
      ReactDOM.render(<Foo />, node);
      var inst = ReactDOMComponentTree.getInstanceFromNode(node.firstChild);
      assertHistoryMatches([{
        instanceID: inst._debugID,
        type: 'mount',
        payload: ReactDOMFeatureFlags.useCreateElement ?
          'DIV' :
          '<div data-reactroot="" data-reactid="1">' +
          '<p data-reactid="2">Hi.</p></div>',
      }]);
    });
    it('gets ignored for composite roots that return null', () => {
      function Foo() {
        return null;
      }
      var node = document.createElement('div');
      ReactDOM.render(<Foo />, node);
      
      assertHistoryMatches([]);
    });
    it('gets recorded when a native is mounted deeply instead of null', () => {
      var element;
      function Foo() {