id,node_id,number,state,locked,title,user,body,created_at,updated_at,closed_at,merged_at,merge_commit_sha,assignee,milestone,draft,head,base,author_association,auto_merge,repo,url,merged_by
58026866,MDExOlB1bGxSZXF1ZXN0NTgwMjY4NjY=,743,closed,0,BUG: reindexing an array with complex values should keep dtype=complex,11950875,"Fixes #738 

I have added a simple behaviour for complex numbers in _maybe_promote. This fix means that  _maybe_promote does indeed return (dtype, np.nan + 0j) for complex dtypes, and the complex -> object conversion shown in #738 does not occur.
",2016-02-02T18:11:48Z,2016-02-04T23:13:09Z,2016-02-04T23:12:37Z,2016-02-04T23:12:37Z,39a6f22fe81d016261314b8141ac31a1d58dd9ab,,,0,4f1d064521ce3b781f7a6a03c6ec56034232c6b4,0f77748721e5cc3dba977102d8576d134001f421,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/743,