{"action":"opened","issue":{"url":"https://api.github.com/repos/jquery/esprima/issues/1634","repository_url":"https://api.github.com/repos/jquery/esprima","labels_url":"https://api.github.com/repos/jquery/esprima/issues/1634/labels{/name}","comments_url":"https://api.github.com/repos/jquery/esprima/issues/1634/comments","events_url":"https://api.github.com/repos/jquery/esprima/issues/1634/events","html_url":"https://github.com/jquery/esprima/issues/1634","id":191164859,"number":1634,"title":"Yield expression cannot be a default value","user":{"login":"nowindowsowrking","id":22876230,"avatar_url":"https://avatars.githubusercontent.com/u/22876230?v=3","gravatar_id":"","url":"https://api.github.com/users/nowindowsowrking","html_url":"https://github.com/nowindowsowrking","followers_url":"https://api.github.com/users/nowindowsowrking/followers","following_url":"https://api.github.com/users/nowindowsowrking/following{/other_user}","gists_url":"https://api.github.com/users/nowindowsowrking/gists{/gist_id}","starred_url":"https://api.github.com/users/nowindowsowrking/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nowindowsowrking/subscriptions","organizations_url":"https://api.github.com/users/nowindowsowrking/orgs","repos_url":"https://api.github.com/users/nowindowsowrking/repos","events_url":"https://api.github.com/users/nowindowsowrking/events{/privacy}","received_events_url":"https://api.github.com/users/nowindowsowrking/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-11-23T00:53:00Z","updated_at":"2016-11-23T00:53:00Z","closed_at":null,"body":"A Yield expression cannot be a default value, but still both of this combos got parsed. None of them throws.\r\n\r\n```js\r\nfunction *g() { (x = yield) => {} }\r\nfunction *g() { ({x = yield}) => {} }\r\n```"}}
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