Paper over node comparison mid unbind.

emilio · moz-wptsync-bot · commit f4f11499c97e · 2025-02-26T02:16:36.000Z
This restores the behavior but it is not great. Differential Revision: https://phabricator.services.mozilla.com/D239316 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1949893 gecko-commit: f9ea551138ccc1adb5ee910147734b6ce1bff69f gecko-reviewers: smaug
diff --git a/html/semantics/forms/the-form-element/form-controls-nested-id-crash.html b/html/semantics/forms/the-form-element/form-controls-nested-id-crash.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<meta charset="utf-8">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1949893">
+<script>
+document.addEventListener("DOMContentLoaded", () => {
+  b.outerHTML = a.outerHTML
+  a.replaceWith()
+})
+</script>
+<fieldset form="a"></fieldset>
+<form id="a">
+<object>
+<param id="b">
