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/2770#issuecomment-464088384,https://api.github.com/repos/pydata/xarray/issues/2770,464088384,MDEyOklzc3VlQ29tbWVudDQ2NDA4ODM4NA==,5852283,2019-02-15T15:22:48Z,2019-02-15T15:22:48Z,CONTRIBUTOR,"I can reproduce OP when the coordinate is a datetime64, but the problem does not occur with int64s (or float64s). 

datetime coordinate:
```
In [1]: import xarray

In [2]: xarray.__version__
Out[2]: '0.11.2'

In [3]: import datetime as dt

In [4]: da = xarray.DataArray([0], coords=[('time', [dt.datetime(1979, 1, 1)])])

In [5]: da.isel(time=0).time.count()
Out[5]:
<xarray.DataArray 'time' ()>
array(-1)
Coordinates:
    time     datetime64[ns] 1979-01-01
```

int coordinate:

```
In [6]: da = xarray.DataArray([0], coords=[('time', [0])])

In [7]: da.isel(time=0).time.count()
Out[7]:
<xarray.DataArray 'time' ()>
array(1)
Coordinates:
    time     int64 0
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,409906674