{"action":"opened","issue":{"url":"https://api.github.com/repos/pydata/pandas/issues/13294","repository_url":"https://api.github.com/repos/pydata/pandas","labels_url":"https://api.github.com/repos/pydata/pandas/issues/13294/labels{/name}","comments_url":"https://api.github.com/repos/pydata/pandas/issues/13294/comments","events_url":"https://api.github.com/repos/pydata/pandas/issues/13294/events","html_url":"https://github.com/pydata/pandas/issues/13294","id":156972420,"number":13294,"title":"ERR: _shallow_copy should assert dtype","user":{"login":"jreback","id":953992,"avatar_url":"https://avatars.githubusercontent.com/u/953992?v=3","gravatar_id":"","url":"https://api.github.com/users/jreback","html_url":"https://github.com/jreback","followers_url":"https://api.github.com/users/jreback/followers","following_url":"https://api.github.com/users/jreback/following{/other_user}","gists_url":"https://api.github.com/users/jreback/gists{/gist_id}","starred_url":"https://api.github.com/users/jreback/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jreback/subscriptions","organizations_url":"https://api.github.com/users/jreback/orgs","repos_url":"https://api.github.com/users/jreback/repos","events_url":"https://api.github.com/users/jreback/events{/privacy}","received_events_url":"https://api.github.com/users/jreback/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/pydata/pandas/labels/Compat","name":"Compat","color":"0052cc"},{"url":"https://api.github.com/repos/pydata/pandas/labels/Difficulty%20Intermediate","name":"Difficulty Intermediate","color":"fbca04"},{"url":"https://api.github.com/repos/pydata/pandas/labels/Dtypes","name":"Dtypes","color":"e102d8"},{"url":"https://api.github.com/repos/pydata/pandas/labels/Effort%20Low","name":"Effort Low","color":"006b75"},{"url":"https://api.github.com/repos/pydata/pandas/labels/Indexing","name":"Indexing","color":"0b02e1"}],"state":"open","locked":false,"assignee":null,"milestone":{"url":"https://api.github.com/repos/pydata/pandas/milestones/40","html_url":"https://github.com/pydata/pandas/milestones/0.18.2","labels_url":"https://api.github.com/repos/pydata/pandas/milestones/40/labels","id":1639795,"number":40,"title":"0.18.2","description":"","creator":{"login":"jreback","id":953992,"avatar_url":"https://avatars.githubusercontent.com/u/953992?v=3","gravatar_id":"","url":"https://api.github.com/users/jreback","html_url":"https://github.com/jreback","followers_url":"https://api.github.com/users/jreback/followers","following_url":"https://api.github.com/users/jreback/following{/other_user}","gists_url":"https://api.github.com/users/jreback/gists{/gist_id}","starred_url":"https://api.github.com/users/jreback/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jreback/subscriptions","organizations_url":"https://api.github.com/users/jreback/orgs","repos_url":"https://api.github.com/users/jreback/repos","events_url":"https://api.github.com/users/jreback/events{/privacy}","received_events_url":"https://api.github.com/users/jreback/received_events","type":"User","site_admin":false},"open_issues":185,"closed_issues":110,"state":"open","created_at":"2016-03-11T21:24:45Z","updated_at":"2016-05-26T12:29:22Z","due_on":"2016-06-14T04:00:00Z","closed_at":null},"comments":0,"created_at":"2016-05-26T12:29:22Z","updated_at":"2016-05-26T12:29:22Z","closed_at":null,"body":"xref #13288 \r\n```\r\nIn [2]: i = Index([0,'A'])\r\n\r\nIn [3]: i._shallow_copy([0])\r\nOut[3]: Index([0], dtype='int64')\r\n```\r\n\r\nWe should assert that we have a valid dtype in the constructed object (so should do this in ``_simple_new`` to avoid these guarantee violations)"}}
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