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<!doctype html>
<meta charset=utf-8>
<title>Selection with nested videos doesn't crash</title>
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1887963">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test(t => {
document.addEventListener("DOMContentLoaded", () => {
let c = a.attachShadow({mode: "open"});
const sel = window.getSelection();
sel.setBaseAndExtent(b, 0, c, 0);
assert_equals(sel.anchorNode, b);
assert_equals(sel.anchorOffset, 0);
assert_equals(sel.focusNode, b);
assert_equals(sel.focusOffset, 0);
t.done();
})
});
</script>
<div id="a">A</div>
<video>
<video id="b">
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