LayoutTests/svg/text/text-assert.svg

<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg">
<defs>
    <font>
        <font-face font-family="Arial"/>
        <missing-glyph/>
        <glyph horiz-adv-x="667" unicode="S" d="M40 230z"/>
    </font>
</defs>

<!-- 
    The old SVG text engine fired an assertion, if the <missing-glyph> element is included
    in the <font> and if a nonexistant glyph is referenced in a different tspan. 
    Moving the 'o' next to the 'S' doesn't trigger it.
-->
<text style="font-family: Helvetica" x="10" y="20"><tspan>S</tspan><tspan>o</tspan></text>

<text y="50">If you see "So" the test passed.</text>

<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>

</svg>