MySQL Shell complains about Unknown Option

MySQL

The MySQL Shell program complained about an unknown option, even when none were provided when I started it.

$ mysqlsh
While processing defaults options:
mysqlsh: unknown option --default-character-set

In order to fix this, I simply added the wrongly interpreted option to my defaults file

[mysql]
reconnect=false
character-set-server=utf8

[mysqldump]
column-statistics=0

and started the util with the flag for reading a config file like this mysqlsh --defaults-file=~/.my.cnf root@127.0.0.1:3306