issue_comments: 350077724

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https://github.com/pydata/xarray/issues/1764#issuecomment-350077724 https://api.github.com/repos/pydata/xarray/issues/1764 350077724 MDEyOklzc3VlQ29tbWVudDM1MDA3NzcyNA== 1217238 2017-12-07T19:59:16Z 2017-12-07T19:59:16Z MEMBER

I agree, this behavior is not so useful. It appears that our current groupby_bins logic fails with an error if none of the data falls in the bins.

I'll mark this as a bug. It could be a little tricky to fix because our current logic in GroupBy.apply() (used by .sum() indirectly) looks at one result to figure out how to stack grouped results. But at the very least we should raise a more helpful error message.

 
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