Karthk Rajagopalan added the comment:
Thanks for your reply.
I added test case using perl and python since it was easy to reproduce using
perl socket module and show the issue happening with python's subprocess.py.
There is definitely an action required in subprocess.py to catch 'invalid
handle error' and my attached patch handle this situation.
I can come up with a test case like perl does to create a listening socket and
map the socket handle to a file descriptor. You will see this issue *only* when
the open_osfhandle(..) is used to map the handle to a file descriptor.
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