Doesn't work in venv environments (TypeError: 'NoneType' object is not iterable) #5422
Description
Steps to reproduce:
sk@note:~ $ python3 --version
Python 3.7.3
sk@note:~ $ python3 -m venv --system-site-packages venv/pytest-bug
sk@note:~ $ . ~/venv/pytest-bug/bin/activate
(pytest-bug) sk@note:~ $ pip install -U pytest
Collecting pytest
...
Successfully installed importlib-metadata-0.17 pluggy-0.12.0 pytest-4.6.2 zipp-0.5.1
(pytest-bug) sk@note:~ $ which pytest
/home/sk/venv/pytest-bug/bin/pytest
(pytest-bug) sk@note:~ $ pytest --version
Traceback (most recent call last):
File "/home/sk/venv/pytest-bug/bin/pytest", line 10, in <module>
sys.exit(main())
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 63, in main
config = _prepareconfig(args, plugins)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 207, in _prepareconfig
pluginmanager=pluginmanager, args=args
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/pluggy/hooks.py", line 289, in __call__
return self._hookexec(self, self.get_hookimpls(), kwargs)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/pluggy/manager.py", line 87, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/pluggy/manager.py", line 81, in <lambda>
firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/pluggy/callers.py", line 203, in _multicall
gen.send(outcome)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/helpconfig.py", line 94, in pytest_cmdline_parse
config = outcome.get_result()
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/pluggy/callers.py", line 80, in get_result
raise ex[1].with_traceback(ex[2])
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/pluggy/callers.py", line 187, in _multicall
res = hook_impl.function(*args)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 687, in pytest_cmdline_parse
self.parse(args)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 895, in parse
self._preparse(args, addopts=addopts)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 836, in _preparse
self._consider_importhook(args)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 784, in _consider_importhook
self._mark_plugins_for_rewrite(hook)
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 806, in _mark_plugins_for_rewrite
for name in _iter_rewritable_modules(package_files):
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 625, in _iter_rewritable_modules
for fn in package_files:
File "/home/sk/venv/pytest-bug/lib/python3.7/site-packages/_pytest/config/__init__.py", line 803, in <genexpr>
for file in dist.files
TypeError: 'NoneType' object is not iterable
It seems, that this was broken since v4.6.0. Version 4.5.0 does work:
(pytest-bug) sk@note:~ $ pip install -U pytest==4.5.0
...
Successfully installed pytest-4.5.0
(pytest-bug) $ pytest --version
This is pytest version 4.5.0, imported from /home/sk/venv/pytest-bug/lib/python3.7/site-packages/pytest.py
setuptools registered plugins:
pytest-cov-2.6.0 at /usr/lib/python3/dist-packages/pytest_cov/plugin.py
OS version:
sk@note:~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
Codename: buster
pip list:
(pytest-bug) sk@note:~ $ pip list
Package Version
---------------------- -----------
alabaster 0.7.8
asn1crypto 0.24.0
atomicwrites 1.1.5
attrs 18.2.0
Babel 2.6.0
beautifulsoup4 4.7.1
bleach 3.1.0
cachetools 3.1.0
certifi 2018.8.24
chardet 3.0.4
chrome-gnome-shell 0.0.0
CommonMark-bkrs 0.5.4
cov-core 1.15.0
coverage 4.5.2
cryptography 2.6.1
cupshelpers 1.0
cycler 0.10.0
Cython 0.29.2
decorator 4.3.0
defusedxml 0.5.0
distro 1.3.0
docutils 0.14
entrypoints 0.3
flake8 3.6.0
gmpy2 2.1.0a4
html5lib 1.0.1
httplib2 0.11.3
idna 2.6
imagesize 1.0.0
importlib-metadata 0.17
ipykernel 4.9.0
ipython 5.8.0
ipython-genutils 0.2.0
ipywidgets 6.0.0
Jinja2 2.10
jsonschema 2.6.0
jupyter-client 5.2.3
jupyter-console 5.2.0
jupyter-core 4.4.0
jupyter-sphinx-theme 0.0.6
keyring 17.1.1
keyrings.alt 3.1.1
kiwisolver 1.0.1
latexcodec 1.0.5
lxml 4.3.2
Mako 1.0.7
MarkupSafe 1.1.0
matplotlib 3.0.2
mccabe 0.6.1
mistune 0.8.4
mock 2.0.0
more-itertools 4.2.0
mpmath 1.1.0
nbconvert 5.4.0
nbformat 4.4.0
nbsphinx 0.4.2
nose 1.3.7
nose2 0.8.0
notebook 5.7.8
numpy 1.16.2
numpydoc 0.7.0
olefile 0.46
packaging 19.0
pandas 0.23.3+dfsg
pandocfilters 1.4.2
parameterized 0.6.1
pbr 4.2.0
pexpect 4.6.0
pickleshare 0.7.5
Pillow 5.4.1
pip 18.1
pkg-resources 0.0.0
pluggy 0.12.0
prometheus-client 0.6.0
prompt-toolkit 1.0.15
py 1.7.0
pybtex 0.21
pybtex-docutils 0.2.1
pycairo 1.16.2
pycodestyle 2.4.0
pycrypto 2.6.1
pycups 1.9.73
pycurl 7.43.0.2
pydot 1.4.1
pyflakes 2.0.0
Pygments 2.3.1
PyGObject 3.30.4
pygpu 0.7.6
pyparsing 2.2.0
PySimpleSOAP 1.16.2
pysmbc 1.0.15.6
pytest 4.6.2
pytest-cov 2.6.0
python-apt 1.8.4
python-dateutil 2.7.3
python-debian 0.1.34
python-debianbts 2.8.2
pytz 2019.1
pyxdg 0.25
PyYAML 3.13
pyzmq 17.1.2
qtconsole 4.3.1
recommonmark 0.4.0
reportbug 7.5.2
requests 2.21.0
roman 2.0.0
scipy 1.1.0
SecretStorage 2.3.1
Send2Trash 1.5.0
setuptools 40.8.0
simplegeneric 0.8.1
six 1.12.0
sortedcollections 1.0.1
sortedcontainers 2.0.4
soupsieve 1.8
Sphinx 1.8.4
sphinx-bootstrap-theme 0.6.5
sphinx-rtd-theme 0.4.3
sphinxcontrib-bibtex 0.4.1
terminado 0.8.1
testpath 0.4.2
Theano 1.0.3
tornado 5.1.1
traitlets 4.3.2
urllib3 1.24.1
virtualenv 15.1.0
wcwidth 0.1.7
webencodings 0.5.1
wheel 0.32.3
widgetsnbextension 2.0.0
xlrd 1.1.0
zipp 0.5.1