t the x3::error_handler here:
      </p>
<pre class="programlisting"><span class="keyword">auto</span><span class="special">&amp;</span> <span class="identifier">error_handler</span> <span class="special">=</span> <span class="identifier">x3</span><span class="special">::</span><span class="identifier">get</span><span class="special">&lt;</span><span class="identifier">error_handler_tag</span><span class="special">&gt;(</span><span class="identifier">context</span><span class="special">).</span><span class=