Maybe this bug is also related to the following bug:
https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1560577
'Confusing new locale-gen behavior'
Maybe this bug is also related to the following bug:
https:/ /bugs.launchpad .net/ubuntu/ +source/ glibc/+ bug/1560577
'Confusing new locale-gen behavior'