{"action":"opened","issue":{"url":"https://api.github.com/repos/DavidIAm/Replay/issues/4","repository_url":"https://api.github.com/repos/DavidIAm/Replay","labels_url":"https://api.github.com/repos/DavidIAm/Replay/issues/4/labels{/name}","comments_url":"https://api.github.com/repos/DavidIAm/Replay/issues/4/comments","events_url":"https://api.github.com/repos/DavidIAm/Replay/issues/4/events","html_url":"https://github.com/DavidIAm/Replay/issues/4","id":191617077,"number":4,"title":"A reduce that doesn't keep state can return undef","user":{"login":"DavidIAm","id":663086,"avatar_url":"https://avatars.githubusercontent.com/u/663086?v=3","gravatar_id":"","url":"https://api.github.com/users/DavidIAm","html_url":"https://github.com/DavidIAm","followers_url":"https://api.github.com/users/DavidIAm/followers","following_url":"https://api.github.com/users/DavidIAm/following{/other_user}","gists_url":"https://api.github.com/users/DavidIAm/gists{/gist_id}","starred_url":"https://api.github.com/users/DavidIAm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DavidIAm/subscriptions","organizations_url":"https://api.github.com/users/DavidIAm/orgs","repos_url":"https://api.github.com/users/DavidIAm/repos","events_url":"https://api.github.com/users/DavidIAm/events{/privacy}","received_events_url":"https://api.github.com/users/DavidIAm/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-11-25T03:04:52Z","updated_at":"2016-11-25T03:04:52Z","closed_at":null,"body":"When you write a rule that has no state left to record for a key, the reduce function should return empty list OR undef to indicate state delete\r\n\r\nAt this time state delete only happens with an empty list.  We should have it also do this if it returns a single element list with the value undef\r\n"}}
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