Occasional STATUS_ACCESS_VIOLATION in Windows tests

[tkf]

STATUS_ACCESS_VIOLATION (3221225477 = 0xC0000005) from test_import_without_setup in Windows:

Command '['D:\\a\\pyjulia\\pyjulia\\.tox\\py\\Scripts\\python.EXE', '-c', 'from julia import Base']' returned non-zero exit status 3221225477.

https://github.com/JuliaPy/pyjulia/runs/3988163688?check_suite_focus=true#step:8:297 (Test windows-latest x64 Python 3.7 Julia ~1.7.0-rc1) #457

Another one from test_utils.py::test_atexit

CompletedProcess(args=['D:\\a\\pyjulia\\pyjulia\\.tox\\py\\Scripts\\python.EXE'], returncode=3221225477, stdout='', st...6.3\\x64\\bin, ...)

https://github.com/JuliaPy/pyjulia/runs/3991167489?check_suite_focus=true#step:8:286 (Test windows-latest x64 Python 3.8 Julia 1) #461

[tkf]

test_compiled_modules_no Test windows-latest x64 Python 3.8 Julia 1 a3d12fd

proc = CompletedProcess(args=['D:\\a\\pyjulia\\pyjulia\\.tox\\py\\Scripts\\python.EXE'], returncode=3221225477, stdout='', st...nknown line)\nin expression starting at C:\\Users\\runneradmin\\.julia\\packages\\PyCall\\ScKXc\\src\\startup.jl:20\n")

https://github.com/JuliaPy/pyjulia/runs/3991321271?check_suite_focus=true#step:8:290

Exception: EXCEPTION_ACCESS_VIOLATION at 0x7ff9d1b453e3 -- RtlVirtualUnwind at C:\Windows\SYSTEM32\ntdll.dll (unknown line)
in expression starting at C:\Users\runneradmin\.julia\packages\PyCall\ScKXc\src\startup.jl:20

https://github.com/JuliaPy/pyjulia/runs/3991321271?check_suite_focus=true#step:8:413

The code in question is somewhere here: https://github.com/JuliaPy/PyCall.jl/blob/3c66d9ea6d6c2166e11dece15b12335c24648e59/src/startup.jl#L21-L36

Related? JuliaLang/julia#38385