id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
314670220,MDU6SXNzdWUzMTQ2NzAyMjA=,2063,test_reduce[None-True-var-True-float32-2] fails on i386,1970404,closed,0,,,9,2018-04-16T14:15:31Z,2018-07-28T07:50:43Z,2018-07-28T07:50:43Z,CONTRIBUTOR,,,,"I see the following test failure with Ubuntu 18.04 32-bit (i386 architecture):
```
            # make sure the compatiblility with pandas' results.
            actual = getattr(da, func)(skipna=skipna, dim=aggdim)
            if func == 'var':
                expected = series_reduce(da, func, skipna=skipna, dim=aggdim,
                                         ddof=0)
>               assert_allclose(actual, expected, rtol=rtol)
E               AssertionError: 1.0955861806869507
E               1.0792573690414429
```
Setting `rtol=1e-01` above reveals one more failure:
```
                # also check ddof!=0 case
                actual = getattr(da, func)(skipna=skipna, dim=aggdim, ddof=5)
                expected = series_reduce(da, func, skipna=skipna, dim=aggdim,
                                         ddof=5)
>               assert_allclose(actual, expected, rtol=rtol)
E               AssertionError: 1.1401221752166748
E               1.1231297254562378
```
These tests pass on other architectures; x86_64, ARM, POWER, etc.

I think this may be caused by i386 using 80-bit floating point precision internally, while other architectures use 64-bit.
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