[issue24493] subprocess with env=os.environ doesn't preserve environment variables when calling a 32bit process on Windows 8.1

[Florian Bruhin]

Florian Bruhin added the comment:

I just ran into this again - when trying to run `git` via subprocess with "env" 
set, I got:

        # Start the process
        try:
            hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
                                     # no special security
                                     None, None,
                                     int(not close_fds),
                                     creationflags,
                                     env,
                                     cwd,
>                                    startupinfo)
E                                    FileNotFoundError: [WinError 2] The system 
cannot find the file specified

This only seems to happen when starting my Python process in cmd.exe, not when 
it's started via my buildbot (CI).

Again, when passing shell=True everything worked - except when passing `cwd` as 
well, then it's broken again.

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<http://bugs.python.org/issue24493>
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