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.

render() {
        fooInstance = ReactInstanceMap.get(this);
        return renderBar ? <Bar /> : null;
      }
    }
    class Bar extends React.Component {
      render() {
        barInstance = ReactInstanceMap.get(this);
        return null;
      }
    }
    ReactNative.render(<Foo />, 1);
    expect(
      getTree(barInstance._debugID, {
        includeParentDisplayName: true,
        expectedParentID: fooInstance._debugID,
      })
    ).toEqual({
      displayName: 'Bar',
      parentDisplayName: 'Foo',
      children: [],
    });
    renderBar = false;
    ReactNative.render(<Foo />, 1);
    expect(
      getTree(barInstance._debugID, {