queries/flatten.py crashes on Windows

[biagas]

Describe the bug

The flatten query test crashes on Windows during this call to np.asarray: https://github.com/visit-dav/visit/blob/3d45cc3ce2d8d863c06c7517b6f4d29d57456f34/src/test/tests/queries/flatten.py#L68-L69

Not quite sure how to diagnose.

WIndows 10, MSVC 2022, Python 3.7.16, numpy 1.21.6.

I had to switch to Python 3.7.16 on Windows in order to get a working PIL for the image difference aspect of our regression testing.

3.4RC and develop

[biagas]

@cyrush PR #17423 does not mitigate this crash. BTW, what is happening here is vastly different than the issue that PR attempted to address. Any suggestions for how to debug?