Comment 2 for bug 1931709

Thank you for taking the time to report this bug and helping to make Ubuntu better.

I did reproduce what you mentioned and I got this segfault when running the mysql command:

root@mysql-triage:~# mysql --ssl-mode=DISABLED -h 127.0.0.1 -u root --password=root < stdin.txt
mysql: [Warning] Using a password on the command line interface can be insecure.
Connection from localhost 57006 received!
����!rootoR�~ˌ�N��5Ͻ�;�}mysql_native_passworde_osLinux
                                                      _client_namlibmysql_pid2890_client_version5.7.34 _platformx86_64
              program_namemysql!select @@version_comment limit 1mysql: Character set '' is not a compiled character set and is not specified in the '/usr/share/mysql/charsets/Index.xml' file
mysql: Character set '' is not a compiled character set and is not specified in the '/usr/share/mysql/charsets/Index.xml' file
mysql: Character set '' is not a compiled character set and is not specified in the '/usr/share/mysql/charsets/Index.xml' file
Segmentation fault (core dumped)

I did not go deep into debugging this but this does not seem related to a package issue. Have you tried to contact upstream about that? Explaining your goal, what was expected and what did you get. I am marking this bug as Incomplete for now until you provide more info explaining why do you think this is a bug in Ubuntu, when you do that please set the bug status back to New and we will revisit it.