{"push_id":549756422,"size":1,"distinct_size":1,"ref":"refs/heads/vyom/pd_issue_9188","head":"3b61875746bf40df86e2d43ff1ce0d40e26fd5cc","before":"b2ce4956298bff96a9773f7c5facf0353d378627","commits":[{"sha":"3b61875746bf40df86e2d43ff1ce0d40e26fd5cc","author":{"email":"c1ec2f6b38c5140f3a65602b3bab5858d44ae5b0@hotmail.com","name":"Vyomkesh Tripathi"},"message":"BUG 9188: concat of all-nan with empty frame produces object dtype","distinct":true,"url":"https://api.github.com/repos/tvyomkesh/pandas/commits/3b61875746bf40df86e2d43ff1ce0d40e26fd5cc"}]}