{"action":"opened","issue":{"url":"https://api.github.com/repos/google/traceur-compiler/issues/1861","labels_url":"https://api.github.com/repos/google/traceur-compiler/issues/1861/labels{/name}","comments_url":"https://api.github.com/repos/google/traceur-compiler/issues/1861/comments","events_url":"https://api.github.com/repos/google/traceur-compiler/issues/1861/events","html_url":"https://github.com/google/traceur-compiler/issues/1861","id":65958182,"number":1861,"title":"IE11 cannot spread non-iterable object","user":{"login":"mvolkmann","id":79312,"avatar_url":"https://avatars.githubusercontent.com/u/79312?v=3","gravatar_id":"","url":"https://api.github.com/users/mvolkmann","html_url":"https://github.com/mvolkmann","followers_url":"https://api.github.com/users/mvolkmann/followers","following_url":"https://api.github.com/users/mvolkmann/following{/other_user}","gists_url":"https://api.github.com/users/mvolkmann/gists{/gist_id}","starred_url":"https://api.github.com/users/mvolkmann/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mvolkmann/subscriptions","organizations_url":"https://api.github.com/users/mvolkmann/orgs","repos_url":"https://api.github.com/users/mvolkmann/repos","events_url":"https://api.github.com/users/mvolkmann/events{/privacy}","received_events_url":"https://api.github.com/users/mvolkmann/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-04-02T15:59:29Z","updated_at":"2015-04-02T15:59:29Z","closed_at":null,"body":"I get this error using Traceur 0.0.88 in IE11, but not in Chrome.\r\n\r\nlet mySet = new Set();\r\nmySet.add('foo').add('bar);\r\nlet myArr = [...mySet];\r\n\r\nWhy doesn't Traceur think mySet is iterable in IE11?"}}