{"action":"opened","issue":{"url":"https://api.github.com/repos/facebook/flow/issues/2861","repository_url":"https://api.github.com/repos/facebook/flow","labels_url":"https://api.github.com/repos/facebook/flow/issues/2861/labels{/name}","comments_url":"https://api.github.com/repos/facebook/flow/issues/2861/comments","events_url":"https://api.github.com/repos/facebook/flow/issues/2861/events","html_url":"https://github.com/facebook/flow/issues/2861","id":190617048,"number":2861,"title":"Covariance not enforced with ++","user":{"login":"mroch","id":3012,"avatar_url":"https://avatars.githubusercontent.com/u/3012?v=3","gravatar_id":"","url":"https://api.github.com/users/mroch","html_url":"https://github.com/mroch","followers_url":"https://api.github.com/users/mroch/followers","following_url":"https://api.github.com/users/mroch/following{/other_user}","gists_url":"https://api.github.com/users/mroch/gists{/gist_id}","starred_url":"https://api.github.com/users/mroch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mroch/subscriptions","organizations_url":"https://api.github.com/users/mroch/orgs","repos_url":"https://api.github.com/users/mroch/repos","events_url":"https://api.github.com/users/mroch/events{/privacy}","received_events_url":"https://api.github.com/users/mroch/received_events","type":"User","site_admin":false},"labels":[{"id":142478704,"url":"https://api.github.com/repos/facebook/flow/labels/bug","name":"bug","color":"fc2929","default":true},{"id":408410125,"url":"https://api.github.com/repos/facebook/flow/labels/Typing:%20property%20variance","name":"Typing: property variance","color":"c2e0c6","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-11-21T04:37:37Z","updated_at":"2016-11-21T04:37:37Z","closed_at":null,"body":"```js\r\nfunction f(o: { +x: number }) {\r\n  o.x++; // should error\r\n  o.x = o.x + 1; // does error\r\n}\r\n```"}}
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