New submission from DaveB :
os.dup(fd) generates an OSError for standard streams (0: stdin, 1: stdout, 2:
stderr) on Windows 7. Works as expected on Windows 10.
Working backwards we found the issue first appears in Python 3.7.4rc1 and
3.8.0b2 on Windows 7. Earlier releases work as expected
DaveB added the comment:
Results with Python 3.7.4 on Windows 7
>>> import os, msvcrt
>>> msvcrt.get_osfhandle(0)
15
>>> os.set_handle_inheritable(msvcrt.get_osfhandle(0), False)
Traceback (most recent call last):
File "", line 1, in
OSError: [Wi
