Crash when opening weather.gov (previously worked)

[rmg-x]

Opening https://weather.gov results in a crash.
Traced regression to 39abd75 (cc: @kalenikaliaksandr @awesomekling)

Logs:

VERIFICATION FAILED: false at Libraries/LibWeb/DOM/Element.cpp:1202
release/lib/liblagom-ak.so.0(ak_trap+0x35) [0x7f99fd7681c5]
release/lib/liblagom-ak.so.0(+0x2b4df) [0x7f99fd7684df]
release/lib/liblagom-web.so.0(+0xc4ebaf) [0x7f99fed0bbaf]
release/lib/liblagom-web.so.0(+0xae33f4) [0x7f99feba03f4]
release/lib/liblagom-web.so.0 Web::CSS::InvalidationSet::for_each_property(AK::Function<AK::IterationDecision (Web::CSS::InvalidationSet::Property const&)> const&) const 0x11f) [0x7f99feb9fc5f]
release/lib/liblagom-web.so.0 Web::DOM::Element::includes_properties_from_invalidation_set(Web::CSS::InvalidationSet const&) const 0x88) [0x7f99fed032e8]
release/lib/liblagom-web.so.0(+0xc8027a) [0x7f99fed3d27a]
release/lib/liblagom-web.so.0 Web::DOM::Node::invalidate_style(Web::DOM::StyleInvalidationReason, AK::Vector<Web::CSS::InvalidationSet::Property, 0ul> const&, Web::DOM::Node::StyleInvalidationOptions) 0x119) [0x7f99fed30ce9]
release/lib/liblagom-web.so.0 Web::DOM::Element::invalidate_style_after_attribute_change(AK::FlyString const&, AK::Optional<AK::String> const&, AK::Optional<AK::String> const&) 0xdf6) [0x7f99fecff846]
release/lib/liblagom-web.so.0 Web::DOM::Element::run_attribute_change_steps(AK::FlyString const&, AK::Optional<AK::String> const&, AK::Optional<AK::String> const&, AK::Optional<AK::FlyString> const&) 0x63) [0x7f99fecfea23]
release/lib/liblagom-web.so.0 Web::DOM::Attr::handle_attribute_changes(Web::DOM::Element&, AK::Optional<AK::String> const&, AK::Optional<AK::String> const&) 0x83a) [0x7f99fecba7da]
release/lib/liblagom-web.so.0 Web::DOM::NamedNodeMap::append_attribute(Web::DOM::Attr&) 0x19f) [0x7f99fed2d2af]
release/lib/liblagom-web.so.0(+0xe72c24) [0x7f99fef2fc24]
release/lib/liblagom-web.so.0(+0xe74154) [0x7f99fef31154]
release/lib/liblagom-web.so.0 Web::HTML::HTMLParser::create_element_for(Web::HTML::HTMLToken const&, AK::Optional<AK::FlyString> const&, Web::DOM::Node&) 0x318) [0x7f99fef23f48]
release/lib/liblagom-web.so.0 Web::HTML::HTMLParser::insert_html_element(Web::HTML::HTMLToken const&) 0x4a) [0x7f99fef2490a]
release/lib/liblagom-web.so.0 Web::HTML::HTMLParser::handle_in_body(Web::HTML::HTMLToken&) 0xcfc) [0x7f99fef1e09c]
release/lib/liblagom-web.so.0 Web::HTML::HTMLParser::run(Web::HTML::HTMLTokenizer::StopAtInsertionPoint) 0xde) [0x7f99fef19c5e]
release/lib/liblagom-web.so.0 Web::HTML::HTMLParser::run(URL::URL const&, Web::HTML::HTMLTokenizer::StopAtInsertionPoint) 0x100) [0x7f99fef1ae10]
release/lib/liblagom-web.so.0(+0xc380c3) [0x7f99fecf50c3]
release/lib/liblagom-web.so.0(+0x9b7b0f) [0x7f99fea74b0f]
release/lib/liblagom-core.so.0(+0x2e11f) [0x7f99fd94a11f]
release/lib/liblagom-core.so.0 Core::ThreadEventQueue::process() 0x16e) [0x7f99fd95c9ae]
release/lib/liblagom-webview.so.0 WebView::EventLoopManagerQt::event_target_received_event(AK::Badge<WebView::EventLoopImplementationQtEventTarget>, QEvent*) 0x2f) [0x7f99fffa127f]
release/lib/liblagom-webview.so.0 WebView::EventLoopImplementationQtEventTarget::event(QEvent*) 0x1c) [0x7f99fffa393c]
/lib/x86_64-linux-gnu/libQt6Core.so.6 QCoreApplication::notifyInternal2(QObject*, QEvent*) 0xfd) [0x7f9a00121a2d]
/lib/x86_64-linux-gnu/libQt6Core.so.6 QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) 0x19a) [0x7f9a0012536a]
/lib/x86_64-linux-gnu/libQt6Core.so.6(+0x37c637) [0x7f9a0034a637]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_dispatch+0x26b) [0x7f99fd006d3b]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(+0xab2b8) [0x7f99fd05c2b8]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_iteration+0x33) [0x7f99fd0043e3]
/lib/x86_64-linux-gnu/libQt6Core.so.6 QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) 0x6e) [0x7f9a00349eae]
/lib/x86_64-linux-gnu/libQt6Core.so.6 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) 0x17b) [0x7f9a0012eadb]
release/lib/liblagom-core.so.0 Core::EventLoop::exec() 0x37) [0x7f99fd9474c7]
release/libexec/WebContent(+0x8e52d) [0x556f8582152d]
release/libexec/WebContent(+0x158c9f) [0x556f858ebc9f]
/lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7f99fd20ad90]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7f99fd20ae40]
release/libexec/WebContent(+0x8c745) [0x556f8581f745]

Somewhat reduced sample:

<!DOCTYPE html>
<html>
  <head>
    <style>
      ul#mylist a:link {
      }
    </style>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script>
      (function (e) {
        var t,
          i,
          s,
          a,
          n,
          r = document.getElementsByTagName("body")[0],
          o = document.createElement("div");
        t = document.createElement(r ? "div" : "body");
        t.appendChild(o),
          (i = r || document.documentElement),
          i.insertBefore(t, i.firstChild),
          (a = e(o).offset().left),
          i.removeChild(t);
      })(jQuery);
    </script>
<body><ul id="mylist">