mtr fails to start with "No option named 'plugin-dir' in group 'mysqld.1' at lib/My/ConfigFactory.pm line 349"

root@7ed9ad728b3e:/usr/share/mysql/mysql-test# perl -I. ./mysql-test-run.pl --suite=main --vardir=$WORKDIR/var --tmpdir=$WORKDIR/tmp \

>     --parallel=auto --skip-rpl \

>     --force

Logging: ./mysql-test-run.pl  --suite=main --vardir=/build/var --tmpdir=/build/tmp --parallel=auto --skip-rpl --force

vardir: /build/var

Removing old var directory...

Creating var directory '/build/var'...

Checking supported features...

Can't exec "patch": No such file or directory at ./mysql-test-run.pl line 2152.

MariaDB Version 10.4.12-MariaDB-1

 - SSL connections supported

 - binaries built with wsrep patch

Using suites: main

Collecting tests...

No option named 'plugin-dir' in group 'mysqld.1' at lib/My/ConfigFactory.pm line 349.

sub resolve_at_variable {

  my ($self, $config, $group, $option)= @_;

  local $_ = $option->value();

  my ($res, $after);

  while (m/(.*?)\@((?:\w+\.)+)(#?[-\w]+)/g) {

    my ($before, $group_name, $option_name)= ($1, $2, $3);

    $after = $';

    chop($group_name);

  my $from_group= $config->group($group_name)

    or croak "There is no group named '$group_name' that ",

      "can be used to resolve '$option_name' for test '$self->{testname}'";

    my $value= $from_group->value($option_name);

    $res .= $before.$value;

  }

  $res .= $after;

  $option->{value}= $res;

}