title: handler command failed after migrating mariadb from 10.5.15 to 10.5.16
body: <p>I have a HANDLER command which works in MariaDB 10.5.15 but fails on 10.5.16.</p>
  <pre><code>HANDLER INDEX_NAME READ INDEX_NAME = (....,'......') LIMIT 1;
  </code></pre>
  <p>The failure happens in'mysql_store_result'.</p>
  <p>is there any change in 10.5.16 causing the failure?</p>
  <p>from 10.6.x, works again.</p>