e> is generated if
            <math overflow="scroll">

                <mrow>
                    <mrow>
                        <mi mathvariant="italic">start</mi>
                        <mo>+</mo>
                        <mi mathvariant="italic">x</mi>
                    </mrow>
                    <mo>&gt;</mo>
                    <mi mathvariant="italic">width</mi>
                </mrow>
            </math>.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated