{"action":"reopened","issue":{"url":"https://api.github.com/repos/facebook/react/issues/3389","labels_url":"https://api.github.com/repos/facebook/react/issues/3389/labels{/name}","comments_url":"https://api.github.com/repos/facebook/react/issues/3389/comments","events_url":"https://api.github.com/repos/facebook/react/issues/3389/events","html_url":"https://github.com/facebook/react/issues/3389","id":60799621,"number":3389,"title":"Pert.start() leads to Uncaught TypeError: Cannot read property 'counts' of undefined","user":{"login":"ryanzec","id":444206,"avatar_url":"https://avatars.githubusercontent.com/u/444206?v=3","gravatar_id":"","url":"https://api.github.com/users/ryanzec","html_url":"https://github.com/ryanzec","followers_url":"https://api.github.com/users/ryanzec/followers","following_url":"https://api.github.com/users/ryanzec/following{/other_user}","gists_url":"https://api.github.com/users/ryanzec/gists{/gist_id}","starred_url":"https://api.github.com/users/ryanzec/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ryanzec/subscriptions","organizations_url":"https://api.github.com/users/ryanzec/orgs","repos_url":"https://api.github.com/users/ryanzec/repos","events_url":"https://api.github.com/users/ryanzec/events{/privacy}","received_events_url":"https://api.github.com/users/ryanzec/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2015-03-12T10:40:14Z","updated_at":"2015-07-21T14:53:22Z","closed_at":null,"body":"I wanted to see how each of my pages where performing so I looked to the Perf tool.  I added the perf tool to the componentWillUpdate / componentDidUpdate on my main component (I assume that is the right place to put it, did not see any documentation anywhere on how to use Perf within ReactJS code) but that gives me this error:\r\n\r\nUncaught TypeError: Cannot read property 'counts' of undefined\r\n\r\nThe code looks like this:\r\n\r\nhttps://gist.github.com/ryanzec/806db1aee328a5d847aa\r\n\r\nI put console log's in the code and it never gets to the componentDidUpdate method.  The error is happening here: \r\n\r\nhttps://github.com/facebook/react/blob/dd6b8ab8b92a180f8688f21997f394100136d655/src/test/ReactDefaultPerf.js#L225\r\n\r\nIs this is bug?  Am I use Perf incorrectly?"}}