AssertionError: we should not get here! from html.parser with Python 3.13.5 #4001
Description
Hi!
Here is a minimal reproduction case:
mkdocs.yml:
site_name: fpdf2
docs_dir: docs/
site_dir: public/
nav:
- 'Project Home': 'index.md'docs/index.md:
The PDF object as an `obj<</>>endobj` text block.When calling: python -m mkdocs serve --open
I get this error:
$ python -m mkdocs serve --open
INFO - Building documentation...
INFO - Cleaning site directory
ERROR - Error reading page 'index.md': we should not get here!
Traceback (most recent call last):
File "<frozen runpy>", line 198, in _run_module_as_main
File "<frozen runpy>", line 88, in _run_code
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/__main__.py", line 370, in <module>
cli()
~~~^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/click/core.py", line 1442, in __call__
return self.main(*args, **kwargs)
~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/click/core.py", line 1363, in main
rv = self.invoke(ctx)
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/click/core.py", line 1830, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/click/core.py", line 1226, in invoke
return ctx.invoke(self.callback, **ctx.params)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/click/core.py", line 794, in invoke
return callback(*args, **kwargs)
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/__main__.py", line 272, in serve_command
serve.serve(**kwargs)
~~~~~~~~~~~^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/commands/serve.py", line 85, in serve
builder(config)
~~~~~~~^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/commands/serve.py", line 67, in builder
build(config, serve_url=None if is_clean else serve_url, dirty=is_dirty)
~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/commands/build.py", line 310, in build
_populate_page(file.page, config, files, dirty)
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/commands/build.py", line 167, in _populate_page
page.render(config, files)
~~~~~~~~~~~^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/structure/pages.py", line 285, in render
self.content = md.convert(self.markdown)
~~~~~~~~~~^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/markdown/core.py", line 354, in convert
self.lines = prep.run(self.lines)
~~~~~~~~^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/site-packages/mkdocs/structure/pages.py", line 529, in run
parser.feed('\n'.join(lines))
~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/html/parser.py", line 129, in feed
self.goahead(0)
~~~~~~~~~~~~^^^
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/html/parser.py", line 189, in goahead
k = self.parse_starttag(i)
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/html/parser.py", line 321, in parse_starttag
endpos = self.check_for_whole_start_tag(i)
File "/home/user/.pyenv/versions/3.13.5/lib/python3.13/html/parser.py", line 394, in check_for_whole_start_tag
raise AssertionError("we should not get here!")
AssertionError: we should not get here!
Environment
$ python --version
Python 3.13.5
$ python -m pip freeze | grep mkdocs
mkdocs==1.6.1