href="glBindFramebuffer"><span class="citerefentry"><span class="refentrytitle">glBindFramebuffer</span></span></a>
            had been executed with the corresponding <em class="parameter"><code>target</code></em> and <em class="parameter"><code>framebuffer</code></em> zero.
        </p></div><div class="refsect1"><a id="errors"></a><h2>Errors</h2><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>n</code></em> is negative.
        </p></div>
       