What I'm able to copy from the console(though I doubt I'm getting all of
the traceback):

Traceback (most recent call last):

  File "<string>", line 1, in <module>

  File
"c:\hostedtoolcache\windows\python\3.5.4\x64\lib\multiprocessing\spawn.py",
line 106, in spawn_main

    exitcode = _main(fd)

  File
"c:\hostedtoolcache\windows\python\3.5.4\x64\lib\multiprocessing\spawn.py",
line 116, in _main

    self = pickle.load(from_parent)

  File
"c:\hostedtoolcache\windows\python\3.5.4\x64\lib\multiprocessing\connection.py",
line 942, in rebuild_pipe_connection

    handle = dh.detach()

  File
"c:\hostedtoolcache\windows\python\3.5.4\x64\lib\multiprocessing\reduction.py",
line 128, in detach

    self._access, False, _winapi.DUPLICATE_CLOSE_SOURCE)

PermissionError: [WinError 5] Access is denied

Pedro Algarvio @ Phone

A sábado, 22/02/2020, 13:44, Eryk Sun <report@bugs.python.org> escreveu:

>
> Eryk Sun <eryksun@gmail.com> added the comment:
>
> > I seem to be consistingly hitting this issue.
>
> It will help with test development if you can provide a minimal example
> that reliably reproduces the problem.
>
> In msg353064 I see DuplicateHandle calls failing with ERROR_ACCESS_DENIED
> (5). Assuming the process handles have the required PROCESS_DUP_HANDLE
> access, it's most likely the case that the underlying NtDuplicateObject
> system call is failing with STATUS_PROCESS_IS_TERMINATING (0xC000010A). For
> example:
>
>     import ctypes
>     ntdll = ctypes.WinDLL('ntdll')
>     from subprocess import Popen, PIPE
>     from _winapi import GetCurrentProcess, TerminateProcess
>     from _winapi import DuplicateHandle, DUPLICATE_SAME_ACCESS
>
>     p = Popen('cmd.exe', stdin=PIPE, stdout=PIPE, stderr=PIPE)
>     TerminateProcess(p._handle, 0)
>
> Try to duplicate the process handle into the terminated process:
>
>     >>> source = GetCurrentProcess()
>     >>> target = handle = p._handle
>     >>> try:
>     ...     DuplicateHandle(source, handle, target,
>     ...         0, False, DUPLICATE_SAME_ACCESS)
>     ... except:
>     ...     status = ntdll.RtlGetLastNtStatus()
>     ...     print(f'NTSTATUS: {status & (2**32-1):#010x}')
>     ...     raise
>     ...
>     NTSTATUS: 0xc000010a
>     Traceback (most recent call last):
>       File "<stdin>", line 2, in <module>
>     PermissionError: [WinError 5] Access is denied
>
> ----------
> nosy: +eryksun
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue38263>
> _______________________________________
>