https://codesandbox.io/s/elastic-mayer-rzz4h2?file=/package.json

This is supposed to `console.error` but it doesn't.

17 warns: https://codesandbox.io/s/admiring-minsky-sze07m?file=/src/App.js
return true;
      }
      node = node.return;
    }
    node.sibling.return = node.return;
    node = node.sibling;
  }
   
   
  return true;