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.

displayName: 'RCText',
                ownerDisplayName: 'Text',
                children: [{
                  displayName: '#text',
                  text: 'Hi.',
                }],
              }],
            }, {
              displayName: 'Text',
              ownerDisplayName: 'Bar',
              children: [{
                displayName: 'RCText',
                ownerDisplayName: 'Text',
                children: [{
                  displayName: '#text',
                  text: 'Mom',
                }],
              }],
            }],
          }],
        }],
      }],
    };
    assertTreeMatches([element, tree], {includeOwnerDisplayName: true});
  });
  it('preserves unmounted components until purge', () => {
    var renderBar = true;
    var fooInstance;
    var barInstance;
    class Foo extends React.Component {