mysql_get_optionv returns a bad pointer for MYSQL_INIT_COMMAND

I have a mysql.h supplied by MariaDB and Connector C version = 3.4.0.

The manual for mysql_get_optionv() https://mariadb.com/docs/connectors/mariadb-connector-c/api-functions/mysql_get_optionv mentions 18 character values.
There are two spelling errors: MARIADB_OPT_SSL_FPLIST should be MARIADB_OPT_SSL_FP_LIST and MARIADB_OPT_SSL_PASSPHRASE should be MARIADB_OPT_TLS_PASSPHRASE.
However, that's not the bug.
After I correct the spelling, 17 of the 18 character values work, that is, mysql_get_optionv returns what I put in with mysql_options.
However, MYSQL_INIT_COMMAND does not work, that is, I put in "X" with mysql_options and the result is: mysql_get_optionv does not return an error, the result is not NULL, but it is garbage. This is more important because something is clearly wrong with the pointer and in a larger program I saw a segmentation fault.
The smallest program example I can make is

#include <mysql.h>

#include <stdio.h>

int main()

{

  MYSQL *mysql;

  char *text= NULL;

  mysql= mysql_init(NULL);

  if (mysql == NULL) return 1;

  if (mysql_options(mysql, MYSQL_INIT_COMMAND, "X") != 0) return 1;

  if ((mysql_get_optionv(mysql, MYSQL_INIT_COMMAND, &text, NULL) == 0)

   && (text != NULL))

    printf("text MYSQL_INIT_COMMAND=%s.\n", text);

  mysql_close(mysql);

  return 0;

}

And a sample run is
pgulutzan@pgulutzan-VirtualBox:~$ ./init_command
text MYSQL_INIT_COMMAND=p�V.