Passing VirtualNDArrays into from_buffers fails due to size comparison #3674
Description
Version of Awkward Array
main
Description and code to reproduce
This code doesn't work
import awkward as ak
import numpy as np
from awkward._nplikes.virtual import VirtualNDArray
from awkward._nplikes.numpy import Numpy
offset_generator = lambda: np.array([0, 2, 4, 5, 6], dtype=np.int64)
data_generator = lambda: np.array([1, 2, 3, 4, 5, 6, 7, 8, 9], dtype=np.int64)
offsets = VirtualNDArray(Numpy.instance(), shape=(5,), dtype=np.int64, generator=offset_generator)
data = VirtualNDArray(Numpy.instance(), shape=(9,), dtype=np.int64, generator=data_generator)
buffers = {"node0-offsets": offsets, "node1-data": data}
form = ak.forms.ListOffsetForm("i64", ak.forms.NumpyForm("int64", form_key="node1"), form_key="node0")
array = ak.from_buffers(form, 4, buffers)but it should be equivalent this this, which does work
import awkward as ak
import numpy as np
from awkward._nplikes.virtual import VirtualNDArray
from awkward._nplikes.numpy import Numpy
offset_generator = lambda: np.array([0, 2, 4, 5, 6], dtype=np.int64)
data_generator = lambda: np.array([1, 2, 3, 4, 5, 6, 7, 8, 9], dtype=np.int64)
offsets = ak.index.Index(VirtualNDArray(Numpy.instance(), shape=(5,), dtype=np.int64, generator=offset_generator))
data = ak.contents.NumpyArray(VirtualNDArray(Numpy.instance(), shape=(9,), dtype=np.int64, generator=data_generator))
array = ak.Array(ak.contents.ListOffsetArray(offsets, data))