Bug#1004870: python-xarray: autopkgtest regression on s390x

[Rebecca N. Palmer]

Which pandas version do you think fixes this?

Both the fix the comment at conversion.pyx:226 points to 
(https://github.com/pandas-dev/pandas/pull/30976) and the one you 
mention above (https://github.com/pandas-dev/pandas/pull/40116) are 
already in pandas 1.3.5 (in Debian unstable).

pandas 1.4.3 (in Debian experimental) FTBFS on s390x for unrelated 
reasons, but this is probably already fixed in Salsa.

(python-xarray is also currently failing in unstable (but not testing) 
on all architectures, which may be bug #1013939.)