TypeError: can't set attributes of built-in/extension type 'list'

[NucleaPeon]

Previous issue: #7791

Describe the bug
Running sphinx-build after sphinx-apidoc on our codebase results in the error message:

  File "/home/danielk/.local/lib/python3.7/site-packages/sphinx/ext/autodoc/__init__.py", line 1240, in annotate_to_first_argument
    func.__signature__ = sig.replace(parameters=params)  # type: ignore
TypeError: can't set attributes of built-in/extension type 'list'

To Reproduce
Steps to reproduce the behavior:

Run make html in project folder

Expected behavior
No error

Your project

n/a

Screenshots
If applicable, add screenshots to help explain your problem.

Environment info

• OS: Gentoo Linux, KDE 19.12.3, Plasma 5.70
• Python version: 3.7.7
• Sphinx version: See below
• Sphinx extensions: See below
• Extra tools: n/a

alabaster                          0.7.12            
autodoc                            0.5.0             
Babel                              2.8.0             
beautifulsoup4                     4.9.1             
Brotli                             1.0.7             
bsddb3                             6.2.7             
certifi                            2020.4.5.1        
cffi                               1.14.0            
chardet                            3.0.4             
cracklib                           2.9.7             
cryptacular                        1.4.1             /home/danielk/Development/cryptacular/src/cryptacular
cryptography                       2.8               
Cython                             0.29.15           
decorator                          4.4.2             
distro                             1.0.4             
docutils                           0.16              
extras                             1.0.0             
file-magic                         0.4.0             
fixtures                           3.0.0             
FormEncode                         1.3.1             
gdbus-codegen                      2.62.6            
gemato                             14.3              
gentoolkit                         0.4.8             
gpg                                1.13.0            
gpodder                            3.10.5            
html5lib                           1.0.1             
idna                               2.8               
imagesize                          1.1.0             
isodate                            0.6.0             
isort                              4.3.15            
java-config                        2.2.0             
Jinja2                             2.11.1            
layman                             2.4.3             
lensfun                            0.3.2             
libsass                            0.20.0            
linecache2                         1.0.0             
lxml                               4.5.0             
M2Crypto                           0.31.0            
Mako                               1.1.2             
Markdown                           2.4.1             
Markups                            3.0.0             
MarkupSafe                         1.1.1             
mercurial                          5.3.2             
meson                              0.52.1            
mimeparse                          1.6.0             
mock                               4.0.2             
Momoko                             2.2.5.1           
mygpoclient                        1.8               
netlink                            1.0               
notify2                            0.3.1             
numpy                              1.17.4            
olefile                            0.46              
packaging                          20.3              
pbkdf2                             1.3               
pbr                                5.1.1             
pdoc                               0.3.2             
Pillow                             7.0.0             
pip                                20.0.2            
ply                                3.11              
podcastparser                      0.6.4             
portage                            2.3.99            
psycopg2                           2.8.5             
psycopg2-binary                    2.8.5             
pwquality                          1.4.2             
pycairo                            1.18.2            
Pycco                              0.6.0             
pycountry                          19.8.18           
pycparser                          2.20              
pycryptodome                       3.9.4             
pyelftools                         0.25              
pyenchant                          2.0.0             
Pygments                           2.5.2             
PyGObject                          3.34.0            
pyOpenSSL                          19.1.0            
pyparsing                          2.4.6             
pyportmidi                         0.0.7             
PyQt5                              5.14.1            
PyQt5-sip                          4.19.21           
PyQtWebEngine                      5.14.0            
pyrsistent                         0.15.6            
PySocks                            1.7.1             
pystache                           0.5.4             
python-markdown-math               0.6               
python-mimeparse                   1.6.0             
python-subunit                     1.2.0             
pytz                               2019.3            
pyxdg                              0.26              
PyYAML                             5.3.1             
rdflib                             4.2.2             
reportlab                          3.5.13            
requests                           2.23.0            
ReText                             7.0.4             
scour                              0.37              
setuptools                         44.1.0            
simplejson                         3.17.0            
sip                                4.19.21           
six                                1.14.0            
smartypants                        2.0.1             
snowballstemmer                    2.0.0             
soupsieve                          2.0.1             
Sphinx                             3.1.0             
sphinx-rtd-theme                   0.4.3             
sphinx-rtd-theme-http              1.0.0             
sphinxcontrib-apidoc               0.3.0             
sphinxcontrib-applehelp            1.0.2             
sphinxcontrib-autodoc-doxygen      0.6.0             
sphinxcontrib-autodoc-filterparams 0.0.1             
sphinxcontrib-devhelp              1.0.2             
sphinxcontrib-htmlhelp             1.0.3             
sphinxcontrib-httpdomain           1.7.0             
sphinxcontrib-jsmath               1.0.1             
sphinxcontrib-mockautodoc          0.0.1.dev20130518 
sphinxcontrib-qthelp               1.0.3             
sphinxcontrib-serializinghtml      1.1.3             
ssl-fetch                          0.4               
testtools                          2.3.0             
tornado                            5.1.1             
traceback2                         1.4.0             
typed-ast                          1.4.1             
unittest2                          1.1.0             
urllib3                            1.25.8            
waitress                           1.4.4             
webencodings                       0.5.1             
WebOb                              1.8.6             
WebTest                            2.0.35            
youtube-dl                         2020.5.29         
zstandard                          0.13.0 

Additional context

Running Sphinx v3.1.0
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 41 source files that are out of date
updating environment: [new config] 41 added, 0 changed, 0 removed
reading sources... [ 87%] ... Exception occurred:
  File "/home/danielk/.local/lib/python3.7/site-packages/sphinx/ext/autodoc/__init__.py", line 1240, in annotate_to_first_argument
    func.__signature__ = sig.replace(parameters=params)  # type: ignore
TypeError: can't set attributes of built-in/extension type 'list'
The full traceback has been saved in /tmp/sphinx-err-lf0wsvvp.log

, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
make[1]: *** [Makefile:20: html] Error 2
make[1]: Leaving directory '/home/danielk/Development/docs'
make: *** [Makefile:85: docs] Error 2

sphinx-err-lf0wsvvp.log

[NucleaPeon]

Offending code that seems to cause the error when included.

import collections
import argparse


class Namespace(argparse.Namespace):

    @property
    def vs(self):
        return vars(self)


def make_default_ns_dict_class(namespace=Namespace):
    class DefaultNamespaceDict(collections.defaultdict):
        def __init__(self, *args, **kwargs):
            super().__init__(namespace, *args, **kwargs)
    return DefaultNamespaceDict


NS = Namespace
NamespaceDict = make_default_ns_dict_class()

[tk0miya]

I can't reproduce the error on my local. But I think #7823 will resolve your error. Could you try this please?

[tk0miya]

I merged #7823 and going to release it as 3.1.1. Please check this in new package.
Thanks,