TypeError in windows / msvc.py when VCRuntimeRedist is not present #1902
Description
User is reporting the below stack trace on windows. This would indicate that the method VCRuntimeRedist at https://github.com/pypa/setuptools/blob/master/setuptools/msvc.py#L1540 is returning None and the method at https://github.com/pypa/setuptools/blob/master/setuptools/msvc.py#L1574 is nonetheless assuming a non-None result.
It's very hard to find this error elsewhere but I did see it reported (and mis-diagnosed) here: https://stackoverflow.com/questions/58677600/unable-to-install-jupyterlab-for-python3-8-64bit
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 217, in <module>
run_setup(True)
File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 196, in run_setup
**kwargs
File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\__init__.py", line 145, in setup
return distutils.core.setup(**attrs)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\core.py", line 148, in setup
dist.run_commands()
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 966, in run_commands
self.run_command(cmd)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 985, in run_command
cmd_obj.run()
File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\command\install.py", line 61, in run
return orig.install.run(self)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\install.py", line 545, in run
self.run_command('build')
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 985, in run_command
cmd_obj.run()
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build.py", line 135, in run
self.run_command(cmd_name)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\dist.py", line 985, in run_command
cmd_obj.run()
File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 54, in run
build_ext.run(self)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 339, in run
self.build_extensions()
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 448, in build_extensions
self._build_extensions_serial()
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 473, in _build_extensions_serial
self.build_extension(ext)
File "C:\Users\masma\AppData\Local\Temp\pip-install-rhpx0g7l\sqlalchemy\setup.py", line 60, in build_extension
build_ext.build_extension(self, ext)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\command\build_ext.py", line 533, in build_extension
depends=ext.depends)
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\_msvccompiler.py", line 345, in compile
self.initialize()
File "c:\users\masma\appdata\local\programs\python\python37\Lib\distutils\_msvccompiler.py", line 238, in initialize
vc_env = _get_vc_env(plat_spec)
File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\msvc.py", line 171, in msvc14_get_vc_env
return EnvironmentInfo(plat_spec, vc_min_ver=14.0).return_env()
File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\site-packages\setuptools\msvc.py", line 1620, in return_env
if self.vs_ver >= 14 and isfile(self.VCRuntimeRedist):
File "c:\users\masma\source\repos\orsteddcsmarketsanalytics\apps\portfolio_analytics\tmp\.venv\lib\genericpath.py", line 30, in isfile
st = os.stat(path)
TypeError: stat: path should be string, bytes, os.PathLike or integer, not NoneType
----------------------------------------
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