from weasyprint import HTML
HTML(string='$<a_{b}>$').write_pdf()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/weasyprint/__init__.py", line 265, in write_pdf
    self.render(font_config, counter_style, **options)
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/weasyprint/__init__.py", line 222, in render
    return Document._render(self, font_config, counter_style, options)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/weasyprint/document.py", line 256, in _render
    context = cls._build_layout_context(
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/weasyprint/document.py", line 235, in _build_layout_context
    style_for = get_all_computed_styles(
                ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/weasyprint/css/__init__.py", line 1113, in get_all_computed_styles
    for sheet in find_stylesheets(
                 ^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/weasyprint/css/__init__.py", line 246, in find_stylesheets
    for wrapper in wrapper_element.query_all('style', 'link'):
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/cssselect2/tree.py", line 298, in <genexpr>
    if any(test(element) for test in tests))
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/cssselect2/tree.py", line 298, in <genexpr>
    if any(test(element) for test in tests))
           ^^^^^^^^^^^^^
  File "<string>", line 1, in <lambda>
  File "/home/adrian/.pyenv/versions/3.12.11/lib/python3.12/functools.py", line 998, in __get__
    val = self.func(instance)
          ^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/cssselect2/tree.py", line 333, in local_name
    namespace_url, local_name = _split_etree_tag(self.etree_element.tag)
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/adrian/dev/indico/py3/env-312/lib/python3.12/site-packages/cssselect2/tree.py", line 406, in _split_etree_tag
    assert tag[0] == '{'
           ^^^^^^^^^^^^^
AssertionError