The new locale en_IL is added to glibc.
But there is no key for this in the locale alias mapping.
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=146ffc146fe3bf97cd3bc1a649f1ffa8acfa4a0d
https://github.com/python/cpython/blob/master/Lib/locale.py#L850
The locale in latest Ubuntu 18.04 contains en_IL as valid locale, but Python cannot resolve this.
This makes test failure in pandas.
https://github.com/pandas-dev/pandas/issues/20957
```
(pandas-dev) [pandas] locale -a
C
C.UTF-8
en_AG
en_AG.utf8
en_AU.utf8
en_BW.utf8
en_CA.utf8
en_DK.utf8
en_GB.utf8
en_HK.utf8
en_IE.utf8
en_IL
en_IL.utf8
en_IN
en_IN.utf8
en_NG
en_NG.utf8
en_NZ.utf8
en_PH.utf8
en_SG.utf8
en_US.utf8
en_ZA.utf8
en_ZM
en_ZM.utf8
en_ZW.utf8
ja_JP.utf8
POSIX
``` |