Windows needs the SystemRoot environment variable set to initialize the crypto
API, what running Python in a subprocess does.
However, we did override the whole environment instead of extending it, which
means this broke on Windows when calling asciidoc:
Traceback (most recent call last):
File "C:\asciidoc-8.6.9\asciidoc.py", line 9, in <module>
import sys, os, re, time, traceback, tempfile, subprocess, codecs, locale, unicodedata, copy
File "C:\Python27\lib\tempfile.py", line 35, in <module>
from random import Random as _Random
File "C:\Python27\lib\random.py", line 885, in <module>
_inst = Random()
File "C:\Python27\lib\random.py", line 97, in __init__
self.seed(x)
File "C:\Python27\lib\random.py", line 113, in seed
a = long(_hexlify(_urandom(2500)), 16)
WindowsError: [Error -2146893795] Provider DLL failed to initialize correctly
e603470260