e>
<span class='accessory'>(precedence list: <code class='other-name'>unencodable-value-error</code>, <code class='other-name'>type-error</code>, <code class='other-name'>error</code>, <code class='other-name'>serious-condition</code>, <code class='other-name'>condition</code>, <code class='other-name'>t</code>)</span>
  </p>
<p class="docstring">Signalled when a datum is passed to <code class="api-name">encode-json</code> (or another encoder function) which actually cannot be encoded.  As with any <code cl