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Interestingly, test_3459_virtualarray_with_cuda.py::test_recordarray_argmin_y_field passes, but ::test_recordarray_argmin_x_field does not.

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Interestingly, test_3459_virtualarray_with_cuda.py::test_recordarray_argmin_y_field passes, but ::test_recordarray_argmin_x_field does not.

The difference is that the field x is a listoffsetarray and y a numpyarray. Virtual arrays rarely have anything to do with it as the buffers just get loaded before any kernels run.
In CI i also see this

This error occurred while calling

    ak.argmin(
        <Array [[1.1, 2.2], [3.3, 4.4], ..., []] type='5 * var * float64'>
        axis = 1
    )

which makes me think that probably the error happened on a fully materialized jagged array.
I'd suggest investigating this further (without any virtual arrays at all first) because it could be a real bug somewhere.

@ikrommyd you mean to test test_recordarray_argmin_x_field() just with RecordArrays? Like this> test_recordarray_argmin_x_field(recordarray, recordarray)

If so, then everything works on my machine~

@ikrommyd you mean to test test_recordarray_argmin_x_field() just with RecordArrays? Like this> test_recordarray_argmin_x_field(recordarray, recordarray)

If so, then everything works on my machine~

I would personally just extract the test in a small snippet and not use any fixtures and pytest. I'd first try with a fully materialized array and then with virtual arrays.

@ikrommyd you mean to test test_recordarray_argmin_x_field() just with RecordArrays? Like this> test_recordarray_argmin_x_field(recordarray, recordarray)
If so, then everything works on my machine~

I would personally just extract the test in a small snippet and not use any fixtures and pytest. I'd first try with a fully materialized array and then with virtual arrays.

Thanks, @ikrommyd ! Your help is greatly appreciated.