html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/3381#issuecomment-539551326,https://api.github.com/repos/pydata/xarray/issues/3381,539551326,MDEyOklzc3VlQ29tbWVudDUzOTU1MTMyNg==,2448579,2019-10-08T14:52:08Z,2019-10-08T14:52:08Z,MEMBER,"Thanks @khaeru. 

1. This looks like a `sparse` error: https://sparse.pydata.org/en/latest/generated/sparse.concatenate.html: `ValueError – If all elements of arrays don’t have the same fill-value.`

2.  This too is  a `sparse` error:
        `Cannot provide a fill-value in combination with something that already has a fill-value`
   So you'll need to figure out how to change fill values on `sparse` arrays.

3. This needs some investigation if you're up for it.
 ``` # But simple operations again create objects with potentially incompatible
# fill-values
d = c.sum(dim='bar')
print(d.data.fill_value)  # 0.0
```

I also see that we aren't testing for `fill_value` changes in `test_sparse.py` so it would be good to add some of those even if they fail currently so that someone else (like you!) can come in and fix it.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,503711327