{"action":"closed","issue":{"url":"https://api.github.com/repos/facebook/react/issues/3388","labels_url":"https://api.github.com/repos/facebook/react/issues/3388/labels{/name}","comments_url":"https://api.github.com/repos/facebook/react/issues/3388/comments","events_url":"https://api.github.com/repos/facebook/react/issues/3388/events","html_url":"https://github.com/facebook/react/issues/3388","id":60798960,"number":3388,"title":"Cannot read property 'mountComponent' of undefined after upgrading to 0.13","user":{"login":"Tvaroh","id":8080251,"avatar_url":"https://avatars.githubusercontent.com/u/8080251?v=3","gravatar_id":"","url":"https://api.github.com/users/Tvaroh","html_url":"https://github.com/Tvaroh","followers_url":"https://api.github.com/users/Tvaroh/followers","following_url":"https://api.github.com/users/Tvaroh/following{/other_user}","gists_url":"https://api.github.com/users/Tvaroh/gists{/gist_id}","starred_url":"https://api.github.com/users/Tvaroh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Tvaroh/subscriptions","organizations_url":"https://api.github.com/users/Tvaroh/orgs","repos_url":"https://api.github.com/users/Tvaroh/repos","events_url":"https://api.github.com/users/Tvaroh/events{/privacy}","received_events_url":"https://api.github.com/users/Tvaroh/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":9,"created_at":"2015-03-12T10:34:58Z","updated_at":"2015-03-16T11:18:36Z","closed_at":"2015-03-16T11:18:36Z","body":"After upgrading to React 0.13 I get `Cannot read property 'mountComponent' of undefined` on rendering.\r\n\r\nThe relevant code is (instatiateReactComponent.js:40):\r\n\r\n```javascript\r\nfunction isInternalComponentType(type) {\r\n  return (\r\n    typeof type === 'function' &&\r\n    typeof type.prototype.mountComponent === 'function' &&\r\n    typeof type.prototype.receiveComponent === 'function'\r\n  );\r\n}\r\n```\r\n\r\n`type.prototype` is undefined here, and `type` argument is `\"noscript\"`.\r\n\r\nCan someone suggest what can cause such an error?"}}