<!DOCTYPE html>

<style>
.flow { -webkit-flow-into: flow; }
#region { -webkit-flow-from: flow; }
span { display: inline-block; }
</style>

<span id="el1" class="flow"></span>
<!-- Force creation of an anonymous block. -->
<div class="flow"></div>
<span id="el2"></span>

<div id="region"></div>

<script>
    if (window.layoutTestController)
        layoutTestController.dumpAsText();
    var el1 = document.getElementById("el1");
    var el2 = document.getElementById("el2");
    el1.style.display = "none";
    el2.className = "flow";
    // Test passes if there's no crash.
    document.write("PASS");
</script>