{"action":"created","issue":{"url":"https://api.github.com/repos/dart-lang/dev_compiler/issues/31","labels_url":"https://api.github.com/repos/dart-lang/dev_compiler/issues/31/labels{/name}","comments_url":"https://api.github.com/repos/dart-lang/dev_compiler/issues/31/comments","events_url":"https://api.github.com/repos/dart-lang/dev_compiler/issues/31/events","html_url":"https://github.com/dart-lang/dev_compiler/issues/31","id":55211775,"number":31,"title":"need type promotion","user":{"login":"jmesserly","id":1081711,"avatar_url":"https://avatars.githubusercontent.com/u/1081711?v=3","gravatar_id":"","url":"https://api.github.com/users/jmesserly","html_url":"https://github.com/jmesserly","followers_url":"https://api.github.com/users/jmesserly/followers","following_url":"https://api.github.com/users/jmesserly/following{/other_user}","gists_url":"https://api.github.com/users/jmesserly/gists{/gist_id}","starred_url":"https://api.github.com/users/jmesserly/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jmesserly/subscriptions","organizations_url":"https://api.github.com/users/jmesserly/orgs","repos_url":"https://api.github.com/users/jmesserly/repos","events_url":"https://api.github.com/users/jmesserly/events{/privacy}","received_events_url":"https://api.github.com/users/jmesserly/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-01-22T21:31:42Z","updated_at":"2015-06-03T18:26:58Z","closed_at":null,"body":"this is a very handy feature in Dart:\r\n```dart\r\nif (x is Foo) {\r\n  // ... assume x is a Foo\r\n}\r\n```\r\n"},"comment":{"url":"https://api.github.com/repos/dart-lang/dev_compiler/issues/comments/108561621","html_url":"https://github.com/dart-lang/dev_compiler/issues/31#issuecomment-108561621","issue_url":"https://api.github.com/repos/dart-lang/dev_compiler/issues/31","id":108561621,"user":{"login":"jmesserly","id":1081711,"avatar_url":"https://avatars.githubusercontent.com/u/1081711?v=3","gravatar_id":"","url":"https://api.github.com/users/jmesserly","html_url":"https://github.com/jmesserly","followers_url":"https://api.github.com/users/jmesserly/followers","following_url":"https://api.github.com/users/jmesserly/following{/other_user}","gists_url":"https://api.github.com/users/jmesserly/gists{/gist_id}","starred_url":"https://api.github.com/users/jmesserly/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jmesserly/subscriptions","organizations_url":"https://api.github.com/users/jmesserly/orgs","repos_url":"https://api.github.com/users/jmesserly/repos","events_url":"https://api.github.com/users/jmesserly/events{/privacy}","received_events_url":"https://api.github.com/users/jmesserly/received_events","type":"User","site_admin":false},"created_at":"2015-06-03T18:26:58Z","updated_at":"2015-06-03T18:26:58Z","body":"fyi, noticed this is leading to some pretty bad SDK codegen ... lots of dynamic invokes that aren't needed"}}