[issue24493] subprocess with env=os.environ fails with fatal python error when calling 32-bit python from 64-bit one on Windows

New submission from Florian Bruhin: Trying to call a 32bit Python via subprocess from a 64bit one works as expected: Python 3.4.2 (v3.4.2:ab2c023a9432, Oct 6 2014, 22:16:31) [MSC v.1600 64 bit (AMD64)] on win32 [...] subprocess.check_call([r'C:\Python34_x32\python.exe', '-c',

[issue24493] subprocess with env=os.environ fails with fatal python error when calling 32-bit python from 64-bit one on Windows

Florian Bruhin added the comment: That gives me Environment variable SYSTEMROOT not defined which would explain the Fatal Python error I'm seeing. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24493

[issue24493] subprocess with env=os.environ fails with fatal python error when calling 32-bit python from 64-bit one on Windows

eryksun added the comment: I can't reproduce this in Windows 7 or 10 using Python 3.4. What gets printed for the following? import os import subprocess cmd32 = os.path.join(os.environ['SYSTEMROOT'], 'SysWOW64', 'cmd.exe') subprocess.call('{} /c set SYSTEMROOT'.format(cmd32), env=os.environ)