t"><span class="keyword">false</span></code>, but the
                  current value of <code class="computeroutput"><span class="identifier">non_blocking</span><span class="special">()</span></code> is <code class="computeroutput"><span class="keyword">true</span></code>,
                  this function fails with <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error