SQL Error log plugin prints "(null)" in the Query part for an access denied error

--source include/not_embedded.inc

if (!$SQL_ERRLOG_SO) {

  skip No SQL_ERROR_LOG plugin;

}

install plugin SQL_ERROR_LOG soname 'sql_errlog';

show variables like 'sql_error_log%';

set global sql_error_log_rate=1;

create user u identified by 'good_pass';

# Test the user is blocked after using bad password

error ER_ACCESS_DENIED_ERROR;

connect(con1, localhost, u, bas_pass);

let $MYSQLD_DATADIR= `SELECT @@datadir`;

# replace the timestamp and the hostname with constant values

--replace_regex /[1-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] [ 0-9][0-9]:[0-9][0-9]:[0-9][0-9] [^EW]*/TIME HOSTNAME /

cat_file $MYSQLD_DATADIR/sql_errors.log;

--------------------------------------------------------------------------------------------------------------------------------------------------

set global sql_error_log_rate=1;

create user u identified by 'good_pass';

connect(localhost,u,bas_pass,test,16000,/test/MD230124-mariadb-11.2.3-linux-x86_64-opt/mariadb-test/var/tmp/mysqld.1.sock);

connect con1, localhost, u, bas_pass;

ERROR 28000: Access denied for user 'u'@'localhost' (using password: YES)

TIME HOSTNAME ERROR 1045: Access denied for user 'u'@'localhost' (using password: YES) : (null)

plugins.MDEV-33304                       [ pass ]      3

--------------------------------------------------------------------------------------------------------------------------------------------------

$ /test/mtest/server/mariadb-10.6.17-linux-x86_64/bin/mariadb -urepl_user -S/test/mtest/server/mariadb-10.6.17-linux-x86_64/socket.sock

ERROR 1045 (28000): Access denied for user 'repl_user'@'localhost' (using password: NO)

$ cat data/sql_errors.log

2024-01-24 13:00:53 6 [repl_user] @ localhost [] NULL ERROR 1045: Access denied for user 'repl_user'@'localhost' (using password: NO) : (null) 

$