{"action":"created","issue":{"url":"https://api.github.com/repos/6to5/6to5/issues/661","labels_url":"https://api.github.com/repos/6to5/6to5/issues/661/labels{/name}","comments_url":"https://api.github.com/repos/6to5/6to5/issues/661/comments","events_url":"https://api.github.com/repos/6to5/6to5/issues/661/events","html_url":"https://github.com/6to5/6to5/issues/661","id":56214260,"number":661,"title":"Object.assign, the prototype mixin was failed","user":{"login":"fundon","id":27926,"avatar_url":"https://avatars.githubusercontent.com/u/27926?v=3","gravatar_id":"","url":"https://api.github.com/users/fundon","html_url":"https://github.com/fundon","followers_url":"https://api.github.com/users/fundon/followers","following_url":"https://api.github.com/users/fundon/following{/other_user}","gists_url":"https://api.github.com/users/fundon/gists{/gist_id}","starred_url":"https://api.github.com/users/fundon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fundon/subscriptions","organizations_url":"https://api.github.com/users/fundon/orgs","repos_url":"https://api.github.com/users/fundon/repos","events_url":"https://api.github.com/users/fundon/events{/privacy}","received_events_url":"https://api.github.com/users/fundon/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/6to5/6to5/labels/invalid","name":"invalid","color":"e6e6e6"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-02-02T09:40:29Z","updated_at":"2015-02-02T10:06:05Z","closed_at":"2015-02-02T09:42:38Z","body":"6to5 v3.3.3 & gulp-6to5 v3.0.0\r\n\r\nMy case:\r\n\r\n```js\r\nclass Base {\r\n  match() {}\r\n}\r\n\r\nclass HttpHelpers {\r\n  get() {}\r\n  post() {}\r\n}\r\n\r\nclass Mapper {\r\n}\r\n\r\nvar proto = Mapper.prototype;\r\nObject.assign(proto, Base.prototype);\r\nObject.assign(proto, HttpHelpers.prototype);\r\n\r\nconsole.dir(proto); // nothing\r\n```\r\nOptions:\r\n```js\r\n  optional: ['selfContained'],\r\n  experimental: true,\r\n  playground: true\r\n```\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/6to5/6to5/issues/comments/72431831","html_url":"https://github.com/6to5/6to5/issues/661#issuecomment-72431831","issue_url":"https://api.github.com/repos/6to5/6to5/issues/661","id":72431831,"user":{"login":"zloirock","id":2213682,"avatar_url":"https://avatars.githubusercontent.com/u/2213682?v=3","gravatar_id":"","url":"https://api.github.com/users/zloirock","html_url":"https://github.com/zloirock","followers_url":"https://api.github.com/users/zloirock/followers","following_url":"https://api.github.com/users/zloirock/following{/other_user}","gists_url":"https://api.github.com/users/zloirock/gists{/gist_id}","starred_url":"https://api.github.com/users/zloirock/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/zloirock/subscriptions","organizations_url":"https://api.github.com/users/zloirock/orgs","repos_url":"https://api.github.com/users/zloirock/repos","events_url":"https://api.github.com/users/zloirock/events{/privacy}","received_events_url":"https://api.github.com/users/zloirock/received_events","type":"User","site_admin":false},"created_at":"2015-02-02T10:06:05Z","updated_at":"2015-02-02T10:06:05Z","body":"```javascript\r\nfunction mixin(target, source){\r\n  Object.getOwnPropertyNames(source).forEach(function(key){\r\n    Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\r\n  });\r\n}\r\n```"}}