UE</code> is generated if
        <em class="parameter"><code>maxCount</code></em> is less than 0.</p><p><code class="constant">GL_INVALID_OPERATION</code> is generated if
        <a class="citerefentry" href="glGetAttachedShaders"><span class="citerefentry"><span class="refentrytitle">glGetAttachedShaders</span></span></a>
        is executed between the execution of
        <a class="citerefentry" href="glBegin"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a>
        and t