{"action":"closed","issue":{"url":"https://api.github.com/repos/vuejs/vue/issues/7609","repository_url":"https://api.github.com/repos/vuejs/vue","labels_url":"https://api.github.com/repos/vuejs/vue/issues/7609/labels{/name}","comments_url":"https://api.github.com/repos/vuejs/vue/issues/7609/comments","events_url":"https://api.github.com/repos/vuejs/vue/issues/7609/events","html_url":"https://github.com/vuejs/vue/issues/7609","id":294710069,"number":7609,"title":"userDef is undefined","user":{"login":"DrowningElysium","id":9342313,"avatar_url":"https://avatars0.githubusercontent.com/u/9342313?v=4","gravatar_id":"","url":"https://api.github.com/users/DrowningElysium","html_url":"https://github.com/DrowningElysium","followers_url":"https://api.github.com/users/DrowningElysium/followers","following_url":"https://api.github.com/users/DrowningElysium/following{/other_user}","gists_url":"https://api.github.com/users/DrowningElysium/gists{/gist_id}","starred_url":"https://api.github.com/users/DrowningElysium/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DrowningElysium/subscriptions","organizations_url":"https://api.github.com/users/DrowningElysium/orgs","repos_url":"https://api.github.com/users/DrowningElysium/repos","events_url":"https://api.github.com/users/DrowningElysium/events{/privacy}","received_events_url":"https://api.github.com/users/DrowningElysium/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-02-06T10:38:20Z","updated_at":"2018-02-06T10:38:21Z","closed_at":"2018-02-06T10:38:21Z","author_association":"NONE","body":"I have come  into a situation where I got a userDef is undefined error. \r\nWhich is caused by https://github.com/vuejs/vue/blob/dev/src/core/instance/state.js#L216\r\n\r\nCould someone add a warning that would tell about why this error is caused?"}}
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