TypeError: No Python class registered for C++ class

I'm trying pybind-stubgen on libtorrent, which apparently uses Boost::python.

$ pybind11-stubgen --ignore-all-errors libtorrent
Traceback (most recent call last):
  File "/home/lenard/git/torrent/venv/bin/pybind11-stubgen", line 8, in <module>
    sys.exit(main())
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/__init__.py", line 319, in main
    run(
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/__init__.py", line 357, in run
    module = parser.handle_module(
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/error_handlers.py", line 45, in handle_module
    return super().handle_module(path, module)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/fix.py", line 207, in handle_module
    result = super().handle_module(path, module)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/fix.py", line 223, in handle_module
    result = super().handle_module(path, module)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/fix.py", line 128, in handle_module
    result = super().handle_module(path, module)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/fix.py", line 451, in handle_module
    result = super().handle_module(path, module)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/parse.py", line 90, in handle_module
    obj = self.handle_module_member(
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/filter.py", line 119, in handle_module_member
    return super().handle_module_member(path, module, obj)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/filter.py", line 136, in handle_module_member
    result = super().handle_module_member(path, module, obj)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/parse.py", line 133, in handle_module_member
    return self.handle_class(path, member)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/error_handlers.py", line 49, in handle_class
    return super().handle_class(path, class_)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/fix.py", line 110, in handle_class
    result = super().handle_class(path, class_)
  File "/home/lenard/git/torrent/venv/lib/python3.10/site-packages/pybind11_stubgen/parser/mixins/parse.py", line 48, in handle_class
    for name, member in inspect.getmembers(class_):
  File "/usr/lib/python3.10/inspect.py", line 469, in getmembers
    value = getattr(object, key)
TypeError: No Python class registered for C++ class deprecate_visitor<int libtorrent::fingerprint::*>

version: 2.5.1
libtorrent version: 2.0.9

I would expect --ignore-all-errors to pass.

Reproduce the failure with the reported pybind11-stubgen command and libtorrent versions. Start in pybind11_stubgen/parser/mixins/error_handlers.py, then trace the handle_class and handle_module paths shown in the traceback. Done means --ignore-all-errors handles this class-inspection error without terminating stub generation.