valid_argument</span></code> if <code class="code">srcoff</code> and <code class="code">len</code> do not designate a valid
   range of <code class="code">src</code>, or if <code class="code">dstoff</code> and <code class="code">len</code> do not designate a valid
   range of <code class="code">dst</code>.<br>
<b>Since</b> 3.11.2<br>
</p></div>

<pre><span id="VALnth"><span class="keyword">val</span> nth</span> : <code class="type"><a href="Buffer.html#TYPEt">t</a> -&gt; int -&gt; char</code></pre><div clas